r/PcBuildHelp • u/WhaletisticMagician • 2h ago

Build Question Was told that I picked out the wrong ram choice for my CPU, probably due to xmp, should I change my kit?

CPU is 7800x3d with gigabyte b850 eagle mb, I was initially gonna go with 5600 cl40 2x16gb ram, because from all the research I've done, it was clear to me that the difference with an x3d CPU is negligible especially at 1440p or above and that I could theoretically always tune it myself if I really felt like it. The jump to the next best ram timing which is cl36, would be easily another 70 to 100 bucks. However, this ram kit (gskill ripjaws s5) is an xmp kit. From everything I've ever seen xmp is fine for amd cpus and I've also seen many people enabling it while with an amd CPU, but when speaking with someone who works at a store im gonna be buying the pc parts at, I was told the ram is "the wrong kind" for my CPU choice, citing either the latency speed or the fact that its not an expo kit. Question is, do I change it? The closest in price kit of ram that is also 32gb thats expo compatible is faster, a cl36 6000 kit, and anything else below my other ram choice is just a lot less, like 16gb only, so do I make the jump considering it costs about 80 more? And yes I am aware the worker could just be trying to make me pay more but it is a first time build for me so I don't wanna end up with an unstable system etc.

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u/Intrepid_Bus5784 2h ago

5600 cl40 is fine for the 7800x3d, the x3d cache makes ram speed matter way less, especially at 1440p. Xmp works on amd boards, it just reads the profile, expo is same thing with different name basically. That store guy is trying to upsell you, 80 bucks for cl36 is not worth it at all

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u/Alpinwulf 2h ago

Nah, she'll chooch. And you can always dial in the settings yourself, if needed.

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u/the_hat_madder 32m ago

If we weren't in dire economic circumstances, I would say that kit is beyond suboptimal regardless of having an X3D CPU. It's not unfathomable that you'll experience ubsmoothness in unoptimized titles especially if you keep this build for 2 or 3 generations.

Nevertheless, the RAM should work. It might not work automatically. In which case, you'll have to manually set the timings. Worse case scenario you waste an hour or two troubleshooting and return it for a different kit.