R7 2700X is limited to 2933mhz cl14 on a 3200mhz cl14 4X8GB setup
R7 2700X is limited to 2933mhz cl14 on a 3200mhz cl14 4X8GB setup
Even then, the "Ryzen-optimized" kits adhere to the same formula, mainly being B-Die units. If you could sell your kit(s) and recover most of the cost, the 2x16GB kit seems like the optimal choice—the IMC appears to have some issues with 4xDIMMs, which can limit 'good' performance.
You're essentially choosing between:
1. Spending more money (to sell the 2x8GB twice or buy a 2x16GB kit).
OR
2. Accepting lower performance by adjusting timings to reach 3200MHz.
Personally, I’d keep everything at 2933MHz and fine-tune timings if possible. It’s frustrating with the IMC, but my options are limited, so I’ll go with 2933. I’ve already run a baseline stability test confirming 2933 is fully stable, so I’ll start by tightening timings now. Thanks for your assistance!
It seems 2933 would perform quite well since the latency on the second generation Zen chips was significantly reduced, making RAM speed less critical than in the first generation. The improvement is minimal, around 2% from 3000 Mghz to 3400 Mghz. You can view this at the 4:50 minute point.
JamesSneed explains the performance expectations based on improved latency in the second generation Zen chips. He notes the RAM speed is less critical now compared to the first generation, citing a minimal performance gap of around 2%. He shares a link to a video at the 4:50 mark and mentions trying again tonight, adjusting timings if necessary.
Here are the original notes rewritten with varied phrasing while keeping the same length and structure:
The specifications are as follows:
Processor: AMD R7 2700X
Cooler: NZXT Kraken X62 280mm
Motherboard: Asus Strix ROG Hero VII X470 (1103 bios version / AGESA 1.0.0.6)
Memory: G.skill Trident RGB 3200mhz cl14 (B-die)
Graphics: AMD RX Vega 64 Asus Strix OC
Clock speeds and voltages:
Current memory clock: 2933mhz @ 14-14-14-32-48-1T
CPU overclock: PBO level 2 with -125mv undervolt (120% Current & LLC)
IMC VSOC: 1.03125-1.0375 (120% current & LLC)
RAM VDDR: 1.42V (tried 1.4V - 1.43V but I think the issue lies with the IMC)
CPU temperatures never exceeded 80°C on the hottest day and typically stay between 40°C-50°C during gaming.
I've been working hard for about six months to reach speeds above 3266mhz using just 2X8GB, though a 3200mhz @ cl14 setup worked well. After switching to 4X8GB (same clock and model, different batch) and moving from AGESA 1.0.0.2C to 1.0.0.6, I haven't consistently hit 3000mhz or maintained 100% stability. While 2933mhz isn't too low, I invested in a 3200mhz model and paid for the assurance of reaching that level. Based on what others say, my configuration should support 3200mhz with 4X8GB after some adjustments. I've experimented with various power management settings and tried relaxing timings (though I'd avoid going to CL15). I haven't tested the Ohms adjustment yet, but it might help, though the IMC appears to be a major obstacle. I attempted IMC voltages from 1V to 1.17V without success, even after adjusting power limits. I'm uncertain if I've overlooked something, but I'm giving this a shot now.
I hope someone with experience in Ryzen memory overclocking can offer advice—it would be really helpful since it's been six months and I'm eager to reach my advertised speeds.
Thank you for taking the time to read.
Your main concern is that the x470 chipset caps the RAM clock at exactly 2933mhz, making it impossible to exceed that limit regardless of adjustments. See this link for more details:
https://www.pcworld.com/article/3175005/...ipset.html
your main issue is that the x470 chipset's maximum RAM clock is precisely 2933mhz, meaning you can't exceed it regardless of your efforts. see the link for details. x370 runs at 2667MHz, while Intel's Z370/Z390 reaches 2666MHz officially. Higher speeds aren't impossible, just technically overclocked. look at the QVLs on certain boards—some with official 2666MHz support can handle 4000MHz in specific configurations, and x470 boards usually come with kits rated up to 3200MHz.
Barty1884:
gaberasmussen98 shared insights on the x470 chip set's maximum RAM clock, which is exactly 2933mhz, making it impossible to exceed that limit. Refer to the article for details. X370 runs at 2667MHz, while Intel's Z370/Z390 reaches up to 2666MHz. Higher speeds are technically possible through overclocking. Check the QVLs of specific boards—some with official 2666MHz support can handle 4000MHz in certain kits, and X470 boards usually have kits rated around 3200MHz. I found this quite amusing. Just like your car, it can't exceed the posted speed limit; I'm currently at 3200 RAM speed on my X370, which is stable but requires higher voltages. So 3200 remains a reliable choice.