Hi, It seems like you are willing to do some testing (hence 3dmark program) and that means at some point you are willing to open the case and replace the RAM modules (you are at 32Gb limit already so no more RAM to be added). Still, before you buy, remove one bank of memory and test the remaining one at what frequency is working. If is still at 2400 MHz you can blame the motherboard for limiting the speed to the safe area. On the same note, when you install the RAM bank back make sure the slot is same color like the occupied one (to make sure is set for dual channel). From intel CPU tech data: "Intel® processors come in four different types: Single Channel, Dual Channel, Triple Channel, and Flex Mode. Maximum supported memory speed may be lower when populating multiple DIMMs per channel on products that support multiple memory channels." That is about CPU. The MB might come with different way to set up the RAM frequency as well but that's nu much to be done about it. Overall, figure out if it's worth it to replace the RAM other than trying to achieve a high score in 3DMark which BTW can be affected by many factors. Speaking of 3DMark, run a CPU test, then set up from task manager a higher priority for the running program - see the difference. Of course there is a chance of making the system unstable if you go for highest priority. Also, if you do the RAM removal thing take a picture of labels for that bank, it might contain useful information. Cheers
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