Fastest RAM For AM5 Thread

Hello all,

I wanted to know what the fastest RAM / timings that is possible only AM5 for 2x16GB. I know the sweet spot is 6000 but my motherboard (Asus x670e Extreme with 7950x3d) QVL lists 6400MT/s kits. They are single rank Hynix M Die kits. I just received a 6400CL34 Hynix M die kit which I will be trying soon to optimize. I know the AMD IMC max speed is 3200Mhz. To keep latency low, I would like to keep UCLK=MCLK.

G.Skill Trident Z5 RGB Series F5-6400J3239G16GA2-TZ5RK

I would like to experiment with this to see if I can get it stable at 6400 with tight timings and measure the results on Aida64. Stability tests will be performed in Memtest5 and OCCT.

I’m willing to try other M die kits if I can find higher binned ones. Before this kit, I had ordered a 6600CL34 kit thinking it would be high binned M die but they turned out to be A die. I was only able to get them stable at 6200 with very loose timings. If anyone knows of M kits that are binned higher than 6400CL32, please post them here.

Could you boot 6400 with 1.3 VSOC?

As far as I know tight timings are more important on AM5 than frequency (see e.g. the hardware unboxed video), though maybe that is specific to gaming.

If you are willing to spend on multiple kits, the 24GB modules might be faster (specifically the hynix ones)? Some kits at very high clocked XMP profiles are becoming available but I have not seen much info on how they run on AM5. They are rated at very high frequencies but they may be capable of very tight timings at 6000 or 6200 MT…

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