Overclocking – DDR5-7200
Unfortunately, things get a bit strange when overclocking the RAM kit. Although the motherboard and CPU are capable of higher clock rates than DDR5-7200, this does not work at all with this kit. Keyword “kit”, because the modules individually can be operated on e.g. 7800 Mbps and are stable in the y-cruncher VST. But as soon as you run both modules together, 7200 seems to be a hard limit.
That two modules don’t clock as high as a single one is normal, but in my experience the difference is usually about 200 Mbps, not 600+. We also had the kit exchanged again, but unfortunately the problem exists exactly the same with another kit of the same SKU. This is extremely odd since, according to Corsair, the 7600 variant uses the same PCB. However, you don’t just buy a 7600 kit for comparison and so the only thing left today is to tighten the subtimings for the OC tests.
The modules are also relatively sensitive when the voltage is increased, so that a maximum of 1.5 V is enough for stable operation. Accordingly, voltage-sensitive timings such as tCL and tREFI cannot be tightened as much as one might expect. After all, other timings can be configured relatively aggressively, such as tCWL 16, tRDRD_sg 13 and tWRPRE 40, so at the end of the day a significant performance gain over XMP is still achievable.
Overclocking RAM is not everyone’s cup of tea, and modules are only specified for operation in the XMP profile. From this point of view, the 7200 Dominator Sticks’ somewhat bitchy behavior at the limits should not be held against them too much. However, the behavior is still strange, when all the prerequisites, such as the cooler and the 10-layer board, seem so promising for overclocking.
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