Photo credit: hexus. What happens if you put DDR4 in a DDR5 socket? To be clear, DDR5 is not backward compatible with DDR4 because it uses a different DIMM slot. Share Here are a few reasons why you would want a DDR5 over a DDR4. ddr2, ddr3, ddr4 is the most using ram currently in the market. In comparison, DDR4 has 64-bit channels. If your motherboard is designed for DDR4 RAM, DDR3 RAM simply won't work in it. 2 Gen 2 Type-C ®, RGB FUSION 2. backward compatible with the original slower speed bins. In addition, some minor changes to the SDR interface timing were made in hindsight, and the supply voltage was reduced from 3. As the newest hot type of optical transceivers in 400G high-speed. 4 GT/s. In Xilinx SW for the memory controller definition it is suggested to use the Micron P. 0, Q-Flash Plus . On top of that, both RAM types share completely different approaches under the hood. Must Know. PC-133 is simply capable of running at a higher. The DDR4 memory performs a self-refresh to refresh its content. DDR4 is not backwards compatible with DDR3 motherboards. US. DDR4 modules don’t look different at a glance but there are some subtle differences. With the improvements on the DDR4 comes an increase in its price. DDR5 vs. Do you need desktop computer memory? Best Buy has 4GB, 8GB, & 16GB of RAM for your computer. Is DDR5 backwards compatible with DDR4? The difference betweenDDR5 andDDR4 is thatDDR5 is a completely different type of DIMM. This is why we've seen DDR2, DDR3, and DDR4 RAM after the original generation. NO. PCIe 5. For example, Corsair Vengeance RGB Pro 32GB DDR4-3600 RAM modules cost $109. Be advised that storage capacity is important, but it isn’t the only thing that will determine the overall. DDR5 does not have backward compatibility with DDR4. 0. First, let’s start with keys/notches. The 2666MHz will work, but you'll not know the exact limits of whether it'll take. DDR4 vs DDR3 DIMMs. However, the speed will be limited to the motherboard’s maximum frequency, leading to a performance decrease. Backwards compatible with 2666Mbps. 1. Table 1. Thought I put RAM in backwards, but I hadn't. 0, you can still use them with your new AM4 socket motherboard and Ryzen 7000 processor. DDR5 is not backward compatible with. 2x burst length, 2x banks, 2x bank groups. DDR3L is also pin-compatible with DDR3! DDR3 is a single voltage capable memory DIMM, which supports 1. DDR5 does not have backward compatibility with DDR4. 1,105. 5 volts as your system does not offer a low voltage. Data Rate: 3200MT/s. That's what I thought, cheers guys! Also, those kind of boards don't work with current CPUs. DDR5 has an improved overall bandwidth of up to 1. ASRock may have one but it didn’t. Memory chips have not been backwards compatible since early 2000s when they came out with DDR1. Meanwhile, the LGA1851 platform is expected to lose DDR4 compatibility (which is not surprising as we are dealing with 2nm-based CPUs and DDR4's 1. 35 VoltsI guess they have moved the notch stoping people from trying DDR 5 in 4 slots and then complains they do not work. To prevent accidental installation, the key notch on DDR4 modules is located after a different pin than DDR3 modules, ensuring it can’t slide into DDR3 slots. Unlocked multipler like K. SPD EEPROMFollow. Type Item Price CPU: AMD - Ryzen 7 2700X 3. What happens if you mix DDR3 in a DDR4 slot? All RAM isn't the same and DDR3 and DDR4 can't be used interchangeably. Just as PC100 and PC133 would default to the slower speed, if your board will even support PC3200 (many won't ), it would most definitely slow down to the PC2100 rate. 0 increases from two to three factory profiles, plus two additional rewritable profiles, which you can customize and rename. Comments (8) (Image credit: Asus) Asus is prepping at least five motherboards based on Intel's range-topping Z790 chipset that will support DDR4 memory. Although the RAM kit’s tag. Supports DDR4 3200+ (OC) (Ryzen CPU) / 2400 (A-series APU) That was at the time of release, which was for the cpus/APU's of that current gen. All of Intel’s current 13th Gen processors support 128GB of either DDR4 or DDR5 memory. Each DIMM supports non-ECC 4/8/16/32GB DDR4 module. What makes DDR4 important is that it can easily make up for that deficit by hitting higher clock speeds than DDR3 can. DDR3 RAM uses a 240-pin connector, while DDR4 RAM uses a 288-pin connector. The speed is backward compatible but will need the motherboard to be compatible. The spec sheet for the i7 6700K says that the CPU supports RAM of up to 2133MHz. This article sums up the DDR4 vs DDR5 debate and highlights the important difference between the two technologies to help you with the upgrade question. DDR4: 2: 16 GB: 2133 MHz: Latitude 14 (E7470) DDR4: 2: 16 GB: 1600/2133MHz: Latitude E5570 & E5270: DDR4: 2 (Skylake -U. DDR5 memory modules have a different pin layout than DDR4 memory modules, which. No, DDR3 and DDR4 are not cross compatible. Does DDR4 have XMP? Yes! We’ve been working hard with all major motherboard vendors to ensure compatibility with our high speed DDR4. Recently purchased a Ryzen 9 7900x and Gigabyte B650 AORUS ELITE AX ATX Motherboard for upgrades from my Prime motherboard and i7700k but looking at specs I forgot to check Ram compatibility and also I'm still quite nooby to this stuff, I have rebuilt my PC a couple times now but when it comes down to the finer details I still have much to learn. However, PCI-Express will use speeds based on the lowest of the two versions for communication. You cannot swap across the two nibbles if you want to be compatible with x4 devices. The stick will not fit into the slot, and even if it does, your motherboard will refuse to recognize the format. Its Wired for 8x operation it can't run at 16x cause its not wired that way. In SDRAM modules, the numbers that come after the "PC" refer to the speed of the system's front-side bus. Customize. 0 specifications so overclocking. The DDR4 key notch is in a different place, and the edge connector looks like a. The placement of the DDR4 notch is different to the DDR5. In other words, if you buy a 2666 MHz memory module, and the motherboard can only support 2133 MHz, the memory will go down to 2133 MHz. * 9 th / 8 th Generation Intel Core™ Processor Family only support 300-Series. Hence, I will list which motherboards support DDR5 RAM in this article. Yes, at least as far as Ryzen is concerned, those motherboards are backward compatible. 2 Gen 1 Type-C®, Thunderbolt™ 4 support and 2. The notch has been moved to prevent accidental insertion of the wrong type of memory. Keep in mind that DDR4-3200 is the only speed rating above DDR4-2666 that does not require an odd 125MHz strap. So you can't physically fit a DDR4 module into a DDR5 slot and vice versa. $54. Following this idea, the DDR5 sticks will also NOT be FORWARD compatible either. You will not be able to change to DDR-4 . All of Intel’s current 13th Gen processors support 128GB of either DDR4 or DDR5 memory. 16. 0 slots or Thunderbolt 4 are out of the question. . Supports Intel ® Core™ 14th/ 13th /12th processors. A motherboard designed for DDR5 will not have the necessary slots, circuitry, or firmware to support DDR4 memory, and vice versa. Although DDR4 and DDR5 both use a 288-pin configuration, there is a small notch in the PCB which corresponds to the motherboard’s RAM socket. Go to advance mode. 0 support for trouble-free automatic overclocking. Obvious Reasons for Incompatibility. Second, the DDR3 memory modules will require a BIOS update to operate at their full potential on a DDR4 motherboard. It is designed for PC enthusiasts and gamers, and is backwards compatible with lower frequencies. Of course, you can go higher with some overclocking. Flipped it back around and turned it on again, worked this time. The answer is no, DDR5 has a different pin layout than DDR4 motherboard. 0 were first released in 2019, but CPUs that support PCIe 5. Just bought a new PC with ddr4 that has an empty slot for ram. We ALL wish was true statement and a real thing nowadays, but unfortunately you have to choose one or the other when purchasing your motherboard. DDR4 is not backward compatible with DDR3 motherboards because the physical design of modules (DIMMs) for DDR4 and DDR3 are different. DDR4 RAM: 4 Basic Diffrences!Photo: Backward compatibility and forward compatibility are a PCIe standard. QSFP-DD, as the smallest form factor for 400G transceivers, offers industry’s highest bandwidth density while leveraging the backward compatibility to lower-speed QSFP pluggable modules and cables, making it popular among the fiber optic manufacturers. Select AI Tweaker/ Overclocking tab. dang it, beat me to it by a minute!Auto-overclocking with compatible notebooks (no BIOS configuration required) Frequently bought together. While the X99 platform does see a boost in minimums going from DDR4-2133 to DDR4-2666, that’s where the progress ends. 2. Supports Dual Channel DDR4 1866/ 2133/ 2400/ 2666/ 2933/ 3200. Improve your computer’s performance. 5V and 1. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla. The easiest way to tell whether a particular RAM stick will work with your motherboard is to look at the specifications. Technical Tip for DDR4 Memory backwards compatibility on ThinkSystem and System x Servers. So, you can find the best possible RAM performance by tweaking the modules and saving profiles you're. PC smoked. The stick won't fit into the slot and, even if you did get it wedged in there somehow, your motherboard won't recognize the format. The socket features a dual-channel DDR5 memory interface. So, you can insert PCIe 4. DDR3 and DDR2 are designed differently. DDR5 DIMMs are not backward compatible with DDR4 motherboards. Product Code: 16GB-DDR4-3200-Laptop. Obvious Reasons for Incompatibility. We've rounded up the best motherboards for DDR5 RAM, now that Raptor Lake and Zen 4. . 35 VoltsThe card is a 4. It is my understanding that DDR3 is not forward or backward compatible with earlier iterations; so one cannot use now. The PNY XLR8 16GB DDR4 RAM is backward compatible, too, so if you need to knock it down to a lower frequency, you can. In Xilinx SW for the memory controller definition it is suggested to use the Micron P. Q: How does XMP work on DDR4? See full list on lifewire. Where are DDR4 devices manufactured? DDR4 is produced in Micron fabs around the world, including Virginia, Japan, and. To prevent accidents the key notch in the module has actually been moved a bit. The key notch locations on both RAM sticks look very similar at first glance, but if you stack them side by. Search by OEM brand system, OEM memory part number, or memory specifications. Since this is an HP machine, you can't adjust memory frequency in the BIOS so you need to find something that supports 2933MHz JEDEC. This means that the DDR4 slot on a motherboard will not support memory modules designed for DDR3 or any earlier memory architecture. larger, more robust heatspreader as well as compatibility with our Light Bar Kit, Dominator Airflow Platinum fan, and Corsair Link for monitoring voltage and temperature (Airflow Pro required. $17. 1. Updated GDDR6 memory began to appear in AMD and Nvidia graphics cards in early 2019. But can you use DDR5 modules to upgrade a DDR4 or even a DDR3 motherboard? Q: Is DDR4 backwards compatible with DDR3? A: No. Thus DDR1/DDR2/DDR3/DDR4 all have different pin counts/locations making them physically incompatibale. Therefore, true memory latency of DDR4-3200 CL22 = 13. Exceptional performance with a frequency speed of 3200MHz (PC4-25600), and backwards compatible with lower frequencies (2666MHz, 2400MHz and 2133MHz). High performance DDR4 Laptop Memory designed for PC enthusiasts and gamers. So even if the RAM slots on the DDR5 RAM were to be physically compatible backward with, say, DDR4 RAM, the board would not know how to control the newer generation RAM. LPDDR4 has dual 16-bit channels resulting in a 32-bit total bus. It’s worth mentioning that DDR4 is not backwards compatible, meaning it cannot be used in computers designed for DDR3 or. Essentially, DDR3 is compatible with almost every motherboard and socket out there, but DDR4 is only compatible with boards using Intel’s X99 chipset and LGA 2011 processor socket. Previous DDR generations are backward-compatible within their generation (DDR and DDR2 for example) but it doesn't seem DDR4 is. (PC4-21300), and backwards compatible with lower frequencies (2400MHz and 2133MHz) CAS Latency of 19, 1. Intel B560. Thus DDR1/DDR2/DDR3/DDR4 all have different pin counts/locations making them physically incompatibale. 2 NVMe slot, and possibly the remaining eight as chipset bus. true memory latency of DDR5-4800 CL40 = 16. 0, DDR4, three M. But can you use DDR5 modules to upgrade a DDR4 or even a DDR3 motherboard?RAM generations are not forward or backward compatible. This should give you details regarding the type, amount, and RAM characteristics the motherboard can support. What won't be backward compatible, however, are the motherboards. On my old Sony VAIO, I even took a risk or mixing two. It’s. philetus said: "So if want to upgrade another 8gb of RAM" If you already have 2- 8GB dimms, you need to go to Matched 2-16MB dimms of 2400MHz or 2666MHz and they will run in dual channel. 5 Gb Ethernet. Both modules have key notches to lock them in place in the motherboard’s DIMM slot, but the pin layout on a DDR5 RAM module is different compared to a DDR4 module. 0 system. Currently, only Intel 600 series motherboards offer support for DDR5 RAM. Now, we are currently on a transition phase, from DDR4 to DDR5 memory. The new RAM won't be a problem, but it also might not be downclocked to 2933 depending on the kit you buy (maybe 2133 or 2400). Is DDR5 a lot faster than DDR4? The performance ofDDR5 is double that of the fastestDDR4 modules. DDR2 was introduced in 2003 and operates twice as fast as DDR due to an improved bus signal. you cannot insert DDR4 RAM in a DDR3 DIMM slot. DDR4 RAM is not backwards compatible with DDR3 motherboards and vice versa. DDR5 isn't backward compatible with DDR4, and server motherboards only support one or the other. The DDR interface accomplishes this by reading and writing data on both the rising and falling edges of the clock signal. Immediately turned it off. NOTE: DDR3L low voltage memory - NOT backward compatible with DDR3 memory What is DDR3L memory? Model Memory Type Dimm Slots Max System Memory Memory Compatibility; Latitude 3330: DDR3/DDR3L: 2:. DDR5 changes and advantages over DDR4 DIMMs. This is the list of components so far: However regarding the RAM I was unsure as to which one I should pick. As DDR4 will only work in DDR4 compatible motherboards and DDR3 will only fit in DDR3 compatible motherboards. 2 Gen 2x2 Type-C®, front panel USB 3. AM5 is not backwards compatible with AM4! If you are running anything up to the 5800x3D, it’s gotta be AM4 and DDR4. 0 doubles the bandwidth of 4. 35V. 2 with Thermal Guard, 2. 36x compared to DDR4 at the same clockspeed, giving it improved memory bus utilization. The USB 3. 0 M. DDR4 is a memory standard designed as a better, faster, more reliable replacement for DDR3. G. Upgrade to the Cutting-Edge DDR4 RAM and Embrace the Thrilling Journey of Unparalleled Performance. Extreme overclocked performance DDR4 Desktop Memory designed for PC enthusiasts and gamers and supports Intel XMP 2. (PC4-28800), and backwards compatible with: 3200MHz, 3000MHz, 2933MHz, 2800MHz, 2666MHz, 2400MHz, 2133MHz. Intel's 12th, 13th, and 14th generation Core CPUs support both DDR4 and DDR5. Now, although the performance of your GPU is predominantly determined by the card itself, there are a few minor variables and use-cases that impact that performance. DDR4 and DDR5 Alder Lake motherboards will be available, but you must decide which memory type you want to use. Any way, this is an 075E grade speed (CL=18 cycles) while the MT40A512M16LY-062E IT:E part is 062E speed grade (CL=22 cycles). 5 Gb Ethernet. 3 to 2. Its physically notched differently and the pins are mapped differently so you cannot plug it in and even if you could it would not be able to communicate with the motherboard. If the cost of DDR4-2666MHz is cheaper for you, then a DDR4-2133MHz kit, then you can go for the higher frequency ram but please keep in mind not to mix and match sticks of ram(old+new) for the sake of reliability. SKILL Trident Z Royal Series 32GB (2 x 16GB) F4-3200C16D-32GTRS. In other words, if you buy a 2666 MHz memory module, and the motherboard can only support 2133 MHz, the memory will go down to 2133 MHz. 1 is backward compatible with older HDMI versions, it's probably best to buy an HDMI 2. Take a stick of DDR4 memory, place it onto the converter card, and insert it into a motherboard’s DDR5 slot. Q: Is. 5 V. While DDR4 DIMMs top out at 3. DDR versions do not support forward or backward compatibility. 3Ghz (-0. Technical Tip for DDR4 Memory backwards compatibility on ThinkSystem and System x Servers. G. The big caveat here is on that use case scenario. Sep 24, 2008. 2V may be too high for such parts). AMD processors based on the Zen 3 architecture will only work with 500-series AM4 Motherboards, so any quite far backward compatibility will be a waste of time. 99. r/buildapc. On the other hand, with DDR4, the minimum speed is only 2133MHz. 36x compared to DDR4 at the same clockspeed, giving it improved memory bus utilization. To avoid breaking anything, only utilize the RAM version that your motherboard allows. 2 VoltsNo, you can not. The frequency of this RAM is 2666MHz, which is the sweet spot for most users. Since this is an HP machine, you can't adjust memory frequency in the BIOS so you need to find something that supports 2933MHz JEDEC. 2v (DDR4) to 1. Instead of 240 pins, each module features 288 pins. 5V operation only. That means if. 2 Answers. * Please refer to for Memory support list. 5 V. Toggle navigation. FAQ. Learn the crucial differences between DDR5 and DDR4 in this article. That comment read like one of my essays where I'm just trying to fill the word count. And you can put a GPU of today into a computer that is 10+ years old. See here : Hope this helps, for any further queries reply to the post and feel free to join us again !!When upgrading, make sure to determine what type of RAM you currently have installed. 0 Black Edition Video Card: $429. Supports up to 64 GB Memory. Essentially, it is easier to take. For example, if you use a PCIe 3. Getting DDR3 to run at 2666MHz or higher requires very careful binning of memory chips and can be very expensive, while 2666MHz is the lowest speed of our DDR4. Is DDR4 backwards compatible? DDR4 modules don’t look different at a glance but there are some subtle differences. 5V and 1. I don't know how well that would work out, because the memory controller is often. In other words, if you buy a 2666 MHz memory module, and the motherboard can only support 2133 MHz, the memory will go down to 2133 MHz. Regarding the RAM type, i. The PCI-Express interface is PCI-Express 4. You will require a motherboard that explicitly says it supports DDR5, DDR5 is not backwards compatible. One thing to keep in mind is that memory needs to be the same type - memory modules are not forward or backward compatible in terms of generation types so DDR3 will not work in DDR2 or DDR4. DDR4 in terms of latency. 0, with the socket putting out 28 lanes in total. This motherboard limitation means you'll need to choose whether you want to get the lower-cost DDR4 memory or get DDR5 with the ability to upgrade it in the future. The answer is no, DDR5 has a different pin layout than DDR4 motherboard. 36x compared to DDR4 at the same clockspeed,. Improved speed: With DDR5 technology, the minimum speed will be 4800Mhz. DDR2 runs at twice Memory bus speed and at a lower voltage than DDR. Q: Is DDR4 backwards compatible with DDR3?Apparently, AM5 is a pure-DDR5 platform, with no backwards compatibility with DDR4. 6. * Please refer to for CPU support list. Noctua's entire stack of coolers support AMD's new AM5 socket, but one. DDR4 RAM cannot fit into DDR5 slots, and vice versa. but the memory controller is also backward compatible with DDR4 memory. As to PCIe gen 4, GPUs using the PCIe slot will always be compatible with a PCIe slot regardless of its gen. The i7-5775C and i5-5675C to this day remain the only socketed desktop chips Intel ever made with a huge 128MB of L4 cache, which made it faster than Skylake + DDR4 setups for many applications. First published in September 2012 and most recently updated in January 2020, the JEDEC DDR4 standard has been defined to provide higher performance, with improved reliability and reduced power, thereby representing a significant achievement relative to previous DRAM memory technologies. 0, Q-Flash Plus . AMD and our memory partners have worked together to create the AMD Ryzen™ processor memory compatibility list. DDR5 posts will not work on DDR6 motherboards in the future (fingers crossed). It is finally here, DDR5 RAM was released on the 4th of November 2021 alongside Intel 12th gen CPUs and Z690 motherboards. So, DDR5 motherboards are not backward compatible with DDR4 due to the significant physical, electrical, and technical differences between the two memory types. DDR3L is also pin-compatible with DDR3! DDR3 is a single voltage capable memory DIMM, which supports 1. 0 slots or Thunderbolt 4 are out of the question. Here are a few reasons why you would want a DDR5 over a DDR4. This means DDR4 motherboards and DDR5 memory aren’t cross-compatible. As you can see if it wasn't for the ram an am5 processor would actually end up being cheaper. " Oh ok so there is no choice. The two paths are separate and can execute two independent 8n prefetches. Q. To avoid breaking anything, only utilize the RAM version that your motherboard allows. DDR2 has a 4-bit prefetch, which is twice that of DDR. Bandwidth: 25,600 MB/s (25. 35 mm) in length but the pins in DDR4 are spaced closer (0. ASUS ROG MAXIMUS Z690 EXTREME GLACIAL –. At this point, it is worth mentioning that RAM frequencies are backward compatible. RAM Type (ECC vs Non-ECC, Registered vs not, Buffered vs not) Minimum speeds on a board that cannot adjust the memory frequency. What makes DDR4 important is that it can easily make up for that deficit by hitting higher clock speeds than DDR3 can. Find low everyday prices and buy online for delivery or in-store pick-up. 2 slots, USB 3. 65 V range. In fact, the faster speed grade parts use the same designs as the slower speed bins, but the fast speeds are tested to tighter limits. Compatibility between RAM and computer: DDR generation. Dominator Platinum DDR4 adds a larger, more robust heatspreader as well as compatibility with our Light Bar Kit, Dominator Airflow Platinum fan, and Corsair Link for monitoring voltage and temperature (Airflow Pro required. In turn,. High performance DDR4 Desktop Memory designed for PC enthusiasts and gamers ; Exceptional performance with a frequency speed of 3200MHz (PC4-25600), and backwards compatible with lower frequencies (3000MHz, 2933MHz, 2666MHz, 2400MHz and 2133MHz) CAS Latency of 22, 1. Patriot Signature DDR4 RAM 16GB (1X16GB) 3200MHz CL22 SODIMM Laptop/Notebook Memory Module - PSD416G320081S. SDRAM is a generic term for much older pre-DDR RAM technology, with most systems that use this type of RAM since retired. RAM Type (ECC vs Non-ECC, Registered vs not, Buffered vs not) Minimum speeds on a board that cannot adjust the memory frequency. The notch has been moved to prevent accidental insertion of the wrong type of memory. Is RAM Forward Compatible? Generally, RAM isn’t forward-compatible. Socket 1200 for 10 th / 11 th Gen Intel Core™, Pentium and Celeron processors. To prevent accidents the key notch in the module has actually been moved a bit. Not only this, you cannot mix RAM with different DDR versions on any motherboard. Q: Is DDR4 backwards compatible with DDR3?G. On the downside, LPDDR4X isn’t backward compatible with LPDDR4. NOTE: DDR3L low voltage memory - NOT backward compatible with DDR3 memory What is DDR3L memory? Model Memory Type Dimm Slots Max System Memory Memory Compatibility; Latitude 3330: DDR3/DDR3L: 2:. All of the installed memory will work at 2400MHz. Intel was the first to offer support for the latest memory standard with its Alder Lake CPUs, but built in backwards compatibility with DDR4 in order to still be able to offer a more affordable. However, before upgrading to the latest standard, it’s worth noting that DDR5 RAM is not backward compatible with DDR4. Easy to install. PC Data Center Mobile: Lenovo Mobile: Motorola Smart Service Parts COMMUNITY My Account. CAS Latency. Can DDR5 fit. In the future. Below is an example using the 8Gbit Micron x16 DDR4 3200 Mb/s MT40A512M16LY- 062E device when the target operating rate is 2400 Mb/s:Hello, I'm new to the DDR4 technology and we'd like to use it on a new design with the MPSoC Ultrascale+ on the PS side. When Will It Matter?Pgh Area. Since RAM modules are NOT backward compatible, you cannot use a DDR5 RAM module on a DDR4 motherboard. The DDR4 memory performs a self-refresh to refresh its content. 16 $ 16. DDR vs. 0 Support. DDR4 and DDR3 have key notches in different places on the DIMM to prevent them from being mixed up, and Haswell-E and X99 are DDR4 only. DDR3 and DDR4 memory have different numbers of pins and run on speeds that are poles apart. In addition, the motherboards will support. Intel ® B660 Motherboard with 6+2+1 Phases Hybrid Digital VRM with MOS Heatsink, 2 x PCIe 4. This stylish-looking laptop memory offers XMP 2. The key notch locations on both RAM sticks look very similar at first glance, but if you stack them side by. Yes, 2666 is technically backwards compatible, and the BIOS will clock it down to 2133, but it won't recognize all 4 sticks for some reason. Previous DDR generations are backward-compatible within their generation (DDR and DDR2 for example) but it doesn't seem DDR4 is. DDR generation is one of factors worthy of attention when it comes to the compatibility between RAM and laptop or desktop motherboard. CPU and Motherboard Compatibility. Should i just go for some compatible Corsair Vengeance at like $30 more expensive? PCPartPicker part list / Price breakdown by merchant. 1. Join. The speed is backward compatible but will need the motherboard to be compatible. Reasons Why DDR4 is not compatible with a DDR5 motherboard As DDR4 will only work in DDR4 compatible motherboards and DDR3 will only fit in DDR3 compatible motherboards. The PCI-Express interface is PCI-Express 4. However, it does still retain backward compatibility with DDR4. Intel's latest architecture, Skylake, will support DDR4 across all of its full-fat desktop chips, but it'll also be backward-compatible with DDR3, which adds a huge amount of versatility. DDR3 is not forward compatible with DDR4 devices. The notch has been moved to prevent accidental insertion of the wrong type of memory. However, DDR5 isn't backward compatible with DDR4; motherboards only support one or the other. Within the DDR family, only DDR3 is backwards compatible with DDR2 and DDR, while DDR4 is not officially backwards compatible with any generation. Intel's upcoming Raptor Lake architecture will support both DDR4 and DDR5 memory standards, according to a leaked list of in-development. PCI-Express versions are backward compatible, meaning that you can use a PCIe 4. And it shows frankly a not impressive gain into this new memory standard. Improve your computer’s performance.