Sammelthread Big Navi RX 6700XT/6800(XT)/6900XT Overclocking/Undervolting

[GerryB]

@GerryB I finally hit 23k. I used the voltage trick, and it finally got colder where I am.

nice to see, the great Offset@your 6900

may be, the score could be higher with more maxClock 2590...2595MHz@1062mV (?)
the clockrate looks to flat = most of time the GPU is not powerlimited but clocklimited

 

[cra3khead]

maxClock 2590...2595MHz@1062mV (?)

We tried that before, but for some reason 1062mv doesn't even work with 2575MHz

 

[GerryB]

sounds not ideal, may be MCT minClock 500-->2300MHz helps, .... if minClock=LD3
(or 1075....1081mV with min2500/max2600MHz would be the next higher interesting Combination, if minClock=LD4 )

otherwise
a only efficient setting should be the current 2565@1050 but with 6% lesser watt
285W + Power 112%-->106% (x)

if you look not at the highest score but better score/watt

(x) what happens with SOC= 1025mV ?
How high can you go with fclk, ... 1980...1990...2000?
soc clock = 1/2 eff. vramclock = 2100/2= 1050-->1052MHz
may be, in this high watt range more bandwidth helps
(your current fclk1900@975mV is probably to low)

 

[cra3khead]

(or 1075....1081mV with min2500/max2600MHz would be the next higher interesting Combination, if minClock=LD4 )

I'll try that when it gets cold again; the day I broke 23k was a fluke for this week.

(x) what happens with SOC= 1025mV ?
How high can you go with fclk, ... 1980...1990...2000?
(your current fclk1900@975mV is probably to low)

SOC at 1025mv can do 2050 FCLK; you think I should use that setting 24/7 or just for 3DMark?

 

[GerryB]

depends on the Hotspot
Benchmarking must not be like the 24/7 but can show if higher fclk helps

in real gaming with fps-limit may be 1940 fclk are enough

 

[cra3khead]

in real gaming with fps-limit may be 1940 fclk are enough

I can do SOC 1000mv at 1940 FCLK; would that be better?

 

[GerryB]

all highScore Luxxers with >300W are >1900fclk
so may be this is better with 1940+

1025mV with 2050MHz sounds nicer
whats about 1012mV@24/7

 

[cra3khead]

1025mV with 2050MHz sounds nicer

My bad 1025mv only does 2000 FCLK; I need 1075 SOC to do 2050 FCLK. In that case, what would you recommend doing?

 

[GerryB]

2000fclk only @TS with the 285W+Power 106% and SOC 1052MHz = eff. Vramclock/2
(only 106% power to reach safe temps@100% fan with open case and buy the 3dMark to run without demo, ...
the heating up during the demo is too much with the little cooler)

1925fclk daily with 285W+Power 95%
1925fclk @SOC 987mV ?

in the moment I use fclk1475@6800
a 6900 should can use up to 33% more bandwidth

 

[BreadPit]

I use 975mV / 1000MHz SoC with 1900MHz FCLK because I find very little measurable gains with higher FCLK. And this way Soc is 19W, while for others it is 30-40W. Try it out for yourself and report back, would be interesting!

 

[GerryB]

may be the 30W+ is with high Vramclock>eff.2300MHz+FT2@XTXH with LC-Bios?
but
with lower Vram= eff.2100MHz+FT1 not so much Watt, may be the soc+fclk is easier to undervolt

 

[cra3khead]

1925fclk @SOC 987mV ?

Is the extra voltage worth it for only 25MHz; same for 2000 FCLK at 1025mv SOC. I wouldn't be able to compare it to my 23k score because it was a fluke. I had my room very cold and did the test after startup with a cool pc.

 

[GerryB]

25MHz means 1,3% more bandwidth at fclk-sensitiv scenes (minFps and/or more maxFps)
together with the higher soc 1052Mhz

23000/100= 230points/% , ... but this is not overall at the run, only at some scenes with low camera speed
may be in real = 100points difference !?

may be, ... because of your temps, it´s easier to make a PR with fclk 1900 vs 1925 vs 2000
together with the higher soc 1052MHz

 

[cra3khead]

together with the higher soc 1052Mhz

I always thought the SOCClk was supposed to be half the Fclk? I think FT2 would be better for the run since it's always stable during just TimeSpy runs, just not 24/7 gaming. I'm wondering if I should just bump the SOC to 1000mv and have the Fclk at the default 1940 24/7; I don't think that extra 25Mhz would even be noticeable gaming normally. I have to wait until next week to try a PR anyway; it's going to be 90 degrees for a while again

 

[GerryB]

if you would take a little bit more SOC-volt to reach a little bit more fclk
then a little bit more SOC clock is automatic easy to achieve

should be SOC >1/2 eff. Vram clock (2112-12=2100, ... 2100/2=1050, ... go with 1052)

I remember:
evgasüchtiger@6950 had no problems with higher SOC-clock

btw.
because of the temps make the PR-runs only with 285W Power 100%
thats enough
you don´t need your hot 285W with 112% = 320W !!!

 

[cra3khead]

@GerryB does SOC voltage affect Vram settings? I'm wondering if I do SOC 1v 1940 Fclk and SOC 1052, would it allow me to do 2140FT2 stable in games again? I used to be able to before, but maybe 975mv SOC isn't enough, or should I just accept that my Vram has degraded from pushing it too hard when I was an inexperienced overclocker ?

 

[GerryB]

try Vram 2138MHz, ... set it in in the MCT manuell !!! ... = eff. 2126MHz
DPM3= 1068 should be enough

I hope there are not so much VramDips below 2126, ... that could be unstable.

btw.
would be interesting how this in Vulkan Memtest works
may be also a good stabilty test and you can see if failure correction is necessary with the old vram

 

[cra3khead]

try Vram 2138MHz, ... set it in in the MCT manuell !!! ... = eff. 2126MHz
DPM3= 1068 should be enough

Alongside the Soc settings I mentioned previously? That becomes unstable after half an hour of gameplay with my current 975mv Soc, so I was wondering if upping the Soc voltage and Socclk/Fclk would make it stable again.

 

[GerryB]

2138 is 2MHz less then 2140
may be it helps together with 10 Watt less then your usually 24/7

I don´t know your Vramtemps after 1/2h.

 

[cra3khead]

2138 is 2MHz less then 2140
may be it helps together with 10 Watt less then your usually 24/7

But, do I do it with new SOC settings or not?