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DDR5 - Questions (with answers) about the new technology

  • Q: Why is my Crucial DDR5 memory running at a lower speed than advertised for next-generation computing platforms?

    A: Memory speed is not controlled exclusively by the module itself but also by the memory controller in the CPU and the BIOS/firmware on the motherboard. That’s why we always recommend you update your BIOS first when troubleshooting. If you still notice a system-level downclocking of your Crucial DDR5 memory to slower than 4800MT/s, then we have an easy solution. Simply go to the BIOS settings and enable the pre-defined XMP and you should be all set! The XMP feature is provided for easy performance recovery up to JEDEC speeds in situations like this. However, please keep in mind that this performance recovery is not guaranteed on all DDR5 systems as it is highly dependent on the CPU tier, motherboard tier and BIOS stability.

  • Q: If Crucial DDR5 Desktop Memory is a standard JEDEC memory, why does it have XMP support?

    A: Crucial DDR5 Desktop Memory is indeed the standard JEDEC memory. The XMP support is for easy performance recovery up to JEDEC speeds if and when users experience a system-level downclocking of their memory to slower speeds. However, please keep in mind that this performance recovery is not guaranteed on all DDR5 systems as it is highly dependent on the CPU tier, motherboard tier and BIOS stability.

  • Q: Do Crucial DDR5 Desktop Memory modules have heatspreaders?

    A: No, Crucial DDR5 Desktop Memory modules that launched today in 8, 16 and 32GB densities with speeds of 4800MT/s do not have heatspreaders. Crucial does not see a need for heatspreaders for our standard JEDEC Crucial DDR5 Desktop Memory. However, we continue to analyze system thermals and DIMM-to-DIMM space constraints to determine if heatspreaders will eventually be beneficial or even required for higher speeds to come.

  • Q: Can Crucial DDR5 Desktop Memory overclock beyond the advertised speeds of 4800MT/s?

    A: We do not recommend overclocking our standard JEDEC Crucial DDR5 Desktop Memory. Doing so will void its warranty.

  • Q: Didn’t DDR5 technology already launch with smartphones?

    A: Low-power DDR5 (LPDDR5) launched in 2020 in some smartphones, however, LPDDR5 technology is very different than DDR5. CPUs that support DDR5 memory are expected to be available by the end of 2021. Crucial DDR5 Desktop Memory will be available as soon as the CPUs are available.

  • Q: When will CPUs be available to support DDR5 memory?

    A: Crucial is engaged with Intel and AMD, as well as all motherboard vendors, for DDR5 launch. We expect the first CPUs and motherboards to be available to end consumers by the end of 2021.

  • Q: What’s the difference between DDR5 and DDR4 memory?

    A: DDR5 memory is not just faster than DDR4, it’s better1, marking a revolutionary jump in architecture for better channel efficiency, improved power management, and optimized performance to enable next-generation multi-core computing systems. DDR5 launch speeds deliver nearly double the bandwidth of DDR42. It also enables scaling memory performance without degrading channel efficiency at higher speeds, not just during testing, but under real-world conditions*.

    * Under memory-intensive workloads, DDR5 delivers 1.87x the bandwidth as a result of double burst length, double the banks and bank groups, and significantly higher speed than DDR4. It is enabled to support scaling memory performance with improved channel efficiency, even at higher speeds, not just during testing, but under real-world condition, as established by JEDEC, an independent standardization body that develops open standards for the microelectronics industry.

  • Q: How much faster is Crucial DDR5 memory than DDR4? How does that compare with the competition?

    A: Crucial DDR5 memory will operate at 4800MT/s at launch, which is 1.5x the maximum standard DDR4 speed4. We expect our non-overclocking competition to deliver the same speeds as well.*

    * DDR5 launch speeds of 4800MT/s are comparable to extreme-performance DDR4 memory speeds and are 1.5x (50%) faster than maximum standard DDR4 speeds of 3200MT/s. DDR5 launch speeds of 4800MT/s delivers 1.87x the bandwidth of the maximum standard DDR4 speeds of 3200MT/s.

  • Q: What densities are available for Crucial DDR5 memory? How does that compare with the competition?

    A: Crucial DDR5 memory is available in 8, 16, and 32GB at launch. We expect our non-overclocking competition to deliver the same densities as well.

  • Q: Will DDR5 speeds improve system performance?

    A: Users can see a noticeable improvement when multitasking, switching between apps, and even opening more browser tabs without system overload, when compared to DDR4 performance. Professionals can run taxing apps like editing and video rendering software without dropping frames and render images from 3D models faster than ever4. Gamers can experience smoother game play on titles with higher frame rates. Engineers and programmers can harness massive computing power while compiling complex codes.

  • Q: Is Crucial DDR5 Desktop Memory classified as ECC memory because it has the on-die ECC (ODECC) feature?

    A: No. Crucial DDR5 Desktop Memory is non-ECC memory. The ECC as it pertains to RDIMMs, LRDIMMs, ECC UDIMMs, and ECC SODIMMs is a function that requires additional DRAM at the module level so that platforms such as servers and workstations can correct for errors on individual modules (DIMMs). On-die ECC (ODECC), however, is a feature of the DDR5 component specification and should not be confused with the module-level ECC feature. Crucial DDR5 Desktop Memory is built with DDR5 components that include ODECC, however these modules do not include the additional components necessary for system level ECC.

  • Q: Is there a difference between GDDR5 and DDR5?

    A: Yes! They are not the same. GDDR is used in video RAM while DDR is for system RAM. Comparatively, DDR has lower bandwidth and lower latency while GDDR has higher bandwidth and higher latency. These differences are intentional because of the way they are uniquely used.

  • Q: Will DDR5 memory work on DDR4 systems?

    A: No. DDR5 memory and DDR4 motherboards are not compatible.

  • Q: Will Crucial DDR4 memory be discontinued?

    A: No. Crucial PC DDR4 modules will continue to be available for the vast number of systems that are still built on DDR4 motherboards.

  • Q: Will Crucial release DDR5 memory for laptops?

    A:  Crucial DDR5 Laptop Memory is on the roadmap. We are engaging with Intel and AMD, as well as all motherboard vendors and laptop manufacturers for its launch and will make our products available as soon as the CPUs are available.

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