Performance
Performance has been tested on the AMD platform, including the Ryzen 9 7950X processor, ASRock X870E Taichi Lite motherboard, Colorful RTX4080 Advanced OC 16GB graphics card, Kingston Renegade 2TB NVMe SSD, and FSP 1350W 80+ Platinum PSU.
All results were performed on the KLEVV CRAS V RGB ROG Ed. 48GB DDR5-7200 memory kit. Our stable overclocking limit was 8000MT/s, but it’s a CPU limitation. At this clock, the memory could run at respectable timings of CL38-48-48 at the 1.40/1.40V VDD/VDDQ. The voltage is suitable for daily usage in PC cases with good airflow.
We will start with the AIDA64 Memory and Cache benchmark, which is probably the best application for checking memory bandwidth and latency.
The results in the AIDA64 benchmark almost always look better at higher frequencies, so it is no wonder that our overclocked settings give higher bandwidth. It does not always translate into a performance gain in daily work but suggests that well-balanced frequency and timings provide the best results.
The latency test already suggests that a 1:1 IMC/RAM ratio is optimal, so a manual 6400MT/s, which is the limit for a synchronous ratio. I can already say that a higher RAM frequency won’t be much better with modern AMD in most tests. Even though CRAS V gives us EXPO profiles at 7200MT/s or even higher (non-ROG series even up to 8200MT/s), we are forced to use a 1:2 ratio, so the performance isn’t significantly better than at 6400MT/s and 1:1 ratio.
AIDA64 tests are fully synthetic and usually do not present real-world performance. The following tests should give a better view of the daily performance.
As long as PCMark 10 Applications benchmarks show differences between various RAM settings, we can barely see it in 3DMark benchmarks.
The latest Cinebench 2024 reacts quite well to RAM performance. Even though scores do not seem so different, we can clearly say which memory will be faster in rendering. We must remember that this benchmark takes only a few minutes, and rendering tasks usually take much longer, so also gains from faster RAM will be more significant.
The Final Fantasy XV and Superposition benchmarks have results close to the error margin, but we are used to that on the AMD platform.
The most significant improvements are shown in games. At 1440p and high display details, we can see up to 6FPS difference between various RAM settings. At 1080p, it would be more significant.
KLEVV CRAS V provides high performance out of the box for both AMD and Intel platforms. However, I recommend a 7200MT/s version for Intel motherboards, while for AMD, I would stick with 6400MT/s at low timings.
I will tell you more about overclocking on the next page of this review.
