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It shouldn't.
Although:
- There is some variations between runs, esp. since they are so short and thus depend how the CPU will react with boosting, current voltage/temperature (if your room is hotter that day that alone will reduce boost clocks),etc.. For Corona this can easily be 2-3 seconds for 20 second run, and up to 4-5 second per minute.
- In reviews, benchmarks are run at fresh OS installation, before anything else. It's natural that there will be chance of interference from competing processes, perhaps the Defender decided to scan some files, or Photos app decided on cataloguing, on Windows started compressing files, etc.. that can be million things alone.
- Occasionally software mitigations (like Spectre for Intel CPUs, etc..) are fixed through patches that slow performance down to some degree to fix the loopholes. This is rather unfortunate.. ( I personally have these fixes disabled for my i9 for example, as they're really obscure issues)
If the discrepancy is bigger, some underlying issue can be suspected (quite often memory related).
https://www.techpowerup.com/memtest64/
Some people run it days ;- ) Also if Aida64 and Prime95 don't crash your PC (Prime has memory focused run), that's also good.
That's after enabling XMP profile and lowering the speed from 3200 to 2933 (This is the highest stable speed for 128 GB on X399, esp. low tier memory like Vengeance 3200/16)
I am on verge of barely tolerating the drivel from Burnin.
Removed because it's wrong advice, and neither do I find it funny.
Short answer: It should work.
Long answer: It should, but might not in specific cases. You have to buy identical codename, not just type, to make sure it's identical revision. So if it's called Corsair Vengeance RGB 3000 CL15 but the full code is 12456ABCD001, you have to buy that same code to be guaranteed to have identical kit. Buy it based on that full product code, nothing else.
Because otherwise, what happens between revisions, is that different manufacturer will provide the dies (which only come from Samsung, Micron, or Hynix), and they don't have to play along at their designated rating (XMP profile). It will still work, but if it's 3000 CL15 for example, it may not be stable at such.
Memory compatibility didn't use to be a problem at all, it did become though with AMD Zen architecture which uses memory to much higher degree and has far more sensitive memory controller (this was worst for X399, it's much better for 3rd gen TRX40 right now).
Also, seeing what kit you have, count with possibility that 128 GB for 2950X might not work at 3200 CL16. In that case, enable the XMP profile, and override the speed to 2933. Then you're good to go.
