What Speed Will My Mixed 3200 MHz and 3000 MHz RAM Run At?
Asked by
MellowCedar47
I bought 16 GB of Patriot RAM rated at 3200 MHz and 16 GB of GoodRAM rated at 3000 MHz. Since the two kits have different rated speeds, I'm unsure what frequency they will actually use together. The seller says everything will run at 3200 MHz, but I've heard it may default to a lower speed. What should I expect, and can I enable XMP or DOCP safely?
Answers
If the system boots with both kits installed, it will usually start at a safe JEDEC speed such as 2133, 2400, or 2666 MHz. You can try enabling XMP or DOCP afterward, but the fastest stable setting depends on the exact modules, motherboard, and CPU memory controller.
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Mixed RAM kits are not guaranteed to work together, even when they have similar specifications. A matched 2-stick kit is the safest option. If both kits do work, they commonly run at the highest speed that both can handle, often around 3000 MHz or lower, rather than automatically reaching 3200 MHz.
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The seller’s claim is not a guarantee. Check the memory settings in the BIOS and verify the actual speed in your operating system. XMP or DOCP may work, but if the computer crashes, fails to boot, or produces memory errors, disable it or reduce the speed. Test stability before keeping any overclocked setting.
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You can try selecting the 3000 MHz profile first, since that is the lower rated speed, but profiles are not always compatible across different kits. Avoid guessing at voltage or timings; use the motherboard’s supported settings and consult its memory compatibility list if possible.
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