4000MHz CL15 paired with 5800x configuration
4000MHz CL15 paired with 5800x configuration
I'm wondering if the recommended settings are too high, or maybe I need to adjust them. When I set the frequency to 2000MHz with a lower input frequency, the system boots normally but still shows voltage issues. In that case, the timing numbers don't match the expected 1:2 or 1:1 ratio. CPU-Z on FSB
RAM doesn't display the correct ratio, showing 3:54 instead.For timing, the numbers 16-16-16-36 are tight, which seems fine, but the tRC (Bank Cycle Time) is at 94, which I think isn't ideal. My main concern is whether running it at 3600MHz with an input frequency of 1800MHz is the best path forward, or if I should stick with 4000MHz and 1800MHz. I'm also curious about the experience from others who tried similar configurations, like 3800MHz at 1900MHz FCLK.
What are your thoughts on this? Which setting do you recommend, and what potential problems might arise in the long term?
I'm facing some challenges with my G.SKILL TridentZ 16GB RAM setup. I'm using it in the standard DOCP (XMP) mode, but there are a few strange behaviors I'm not sure about. After booting, the system tries to run at 4000MHz with an input frequency of 1800MHz and specific timing settings (15-16-16-36). However, once it starts, I notice some noise and distortion sounds.
I'm wondering if the recommended settings are too high, or maybe I need to adjust them. When I set the frequency to 2000MHz with a lower input frequency, the system boots normally but still shows voltage issues. In that case, the timing numbers don't match the expected 1:2 or 1:1 ratio. CPU-Z on FSBRAM doesn't display the correct ratio, showing 3:54 instead.
For timing, the numbers 16-16-16-36 are tight, which seems fine, but the tRC (Bank Cycle Time) is at 94, which I think isn't ideal. My main concern is whether running it at 3600MHz with an input frequency of 1800MHz is the best path forward, or if I should stick with 4000MHz and 1800MHz. I'm also curious about the experience from others who tried similar configurations, like 3800MHz at 1900MHz FCLK.
What are your thoughts on this? Which setting do you recommend, and what potential problems might arise in the long term?
StampyKittenNZ
04-13-2020, 08:44 PM #2Cl14 3733 indicates optimal performance with a 1:1 clock ratio.
GabrielTonato
04-14-2020, 05:16 AM #3Work closely with the FCLK because of Ryzen's infinity fabric, which connects the CCDs. Running asynchronously doesn't harm RAM performance but reduces speed by 15-25%. It's uncommon for Zen 3 to hit 2000MHz FCLK, though it's possible depending on the chip. More often you'll reach 1900-1933MHz. You can lower the RAM speed to match and then improve timing. Also, the FSB ratio applies only to the front side bus, not the infinity fabric. That's why the numbers seem inconsistent.
anakindaur
04-15-2020, 09:25 PM #5Hardware Canucks detailed a 15% penalty for async usage. Additional tests indicate comparable outcomes, so you may explore further research yourself.
1cocobanana
04-19-2020, 02:06 AM #7I did Google. That's why I had asked. Results seem to vary though. According to this site, it's not quite that big of a performance difference. 5% at best doing the math in my head.... https://www.overclockersclub.com/guides/...y_scaling/