Quote from: livada on March 29, 2019, 04:15:22 PM

Quote from: rednoW on March 29, 2019, 09:18:34 AM

Quote from: livada on March 29, 2019, 01:48:53 AM

Quote from: rednoW on March 28, 2019, 11:22:20 AM

Quote from: pbfarmer on March 28, 2019, 10:00:46 AM

Quote from: rednoW on March 28, 2019, 09:40:12 AM

my vegas 64 liquid didn't want to go below 875mv (850 in gpu-z) with soc clock 1107 (needed for mem clock 1100). It results in 19.6khs
For 1140 mem clock (1199 soc clock) they need 900mv (875 in gpu-z). It results in 20.2khs

It doesn't depend on gpu clock - only soc clock is setting min required voltage.

vega 56 ref samsung with stock bios is happily mines with 825mv (800 in gpu-z) with 940 mem clock resulting 19.5khs

That's not necessarily true... SOC and core appear to share power lines (which explains their relationship in bios/ppt) - I've seen many cases where a specific voltage which didn't seem to be enough for 1107 SOC was suddenly fine when I dropped core low enough. Ethash was a great algo to test this on, as you can run Vegas at p0 w/ no performance effect. CN-trtl is similar in this regard - while we may not be able to go all the way down to 850 Mhz cclock, 1100 is perfectly performant, and leaves a lot of power headroom for SOC/IF, resulting in lower required voltages.

In short, it's really the combination of core clock + SOC clock which determines your voltage requirement.

yes, thanks.

I disable non needed power states on Overdriventool beta and now able to run my vegas 64LC at ~1280/1100@800mv with 19.6khs. gpu-z power readings 105-115watt
I'm on win10 19.3.3 drivers

how disable? disabe what?
pls copy your overdrivetool profile... and ppt table...

i use 800mv for all p1-5 state but vega64LE vork only with p7 870mv+

Only memory states disabled. You may need to reset/reboot system. Don't use Afterburner. It seems to conflict with this low settings for vega64lc (strange)

ok thx

you use 1548GPU or 1280gpu?

first you say " run my vegas 64LC at ~1280/1100@800mv with 19.6khs." but in table i see 1548gpu

What you set in OverdriveNTool or in Wattman is not what you will get.
You'll get lower clock and voltage. At least according to gpu-z and similar apps.