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

[GerryB]

Should I apply extra thermal putty to other areas of the backplate? I'm just being cautious since this is my first time repasting a GPU, and I want to make sure I understand everything beforehand to avoid breaking anything.

yes, only the red areas seems enough

the backplate cools vram + vrm
that´s enough
with a 120er fan at the backplate this should work

delta hotspot depends the most@watt
above 95°C is not really usefull, because throtteling kicks slowly in
-->24/7 lower the watt till <95°C

 

[cra3khead]

Any idea how I could hit 24k? I'm still waiting for the PTM7950 to arrive, but I don't think it would make that huge of a difference for points; since the max hotspot during a test is 100 degrees.

 

[GerryB]

as I said sometimes, your failure
last weeks the 3dMark was in SALE, .... now to late, = bad decision, don´t bought the opportunity

only with demo=off the temps are good enough
for Runs with fclk 1950...1975...2000@1000...1025...1031...1037mV
and some ds=off in feature control

Vram FT2 with a little bit more Volt?
(my example in TSE see attachment)

What is your minClock, 2500MHz in MCT?
try ULV 1050mV TDV 1056mV together with mooore UVen
MPT= 1112mV, may be with MCT = 1012-->1000...987...981...978mV

 

[ApolloX30]

Any idea how I could hit 24k?

Where do you live - can you put the PC outside for lower air temperatures? If the cooling limits you here, there is not much to gain with all this putty stuff.

 

[GerryB]

He lives in Texas.

if a dumb Benchmark is sooo important, then only Liquidmetall works around 330W tgp = 390...400W tbp
because above 90°C Hotspot the throttel starts slowly

the 6900 TrioX hasn`t a big Cooler
only 3x92mm fans ?, .... older Torq 4
(This are not the good One´s like SuprimeX)

 

[cra3khead]

Vram FT2 with a little bit more Volt?
(my example in TSE see attachment)

For some reason, TimeSpy crashes at 2112 FT2, but it passes memtestvulkan. I have it set to 2108 FT2 currently.

 

[GerryB]

may be 6mV more SOC helps
but 2108FT2 is also a good try because less failure correction@high temps
the difference should be null

for example 24/7 I don´t use 2068 but 2066MHz Vram
gives me the same as 2068, ... no negativ effect

I like it to have some headroom.

 

[ApolloX30]

above 90°C Hotspot the throttel starts slowly

No, slight throttle starts in the 60s Celsius already...

 

[GerryB]

Yes, I know, you are a one of the cool waterboy´s.
may be there is a first slight throttle in your range
but
the bigger much worse impact@air starts higher

I like your Balkon Temps!
much lower then in Texas

 

[cra3khead]

Is there any anyway to make the effective clockspeed closer to 2660MHz without having it set higher in MCT? My card won't exceed that speed while undervolting.

 

[GerryB]

look not only to gfx clock but gfx clock (effective)
ds GFX = off

other values are the tolerances
try 6mV less

but
may be UVen is not so easy with less Tolerance

UVen rules over Clock, if you want a higher TS score
the avg. Clock depends more@UVen then maxClock

 

[cra3khead]

other values are the tolerances
try 6mV less
Anhang anzeigen 1621034

It crashed at the end of GT2 I just want the most clock possible in games.

 

[GerryB]

5MHz less maxClock in MCT
and play a little bit with the minClock ... 2500 +/- 5 MHz

Games are very different to TS
you run TS@default but Games are tweakable in Settings +also Tesselation lower per Adrenalin
therefore it would be possible to run a higher MPT Setting in Games with the same Watt

 

[cra3khead]

probably a other way is also possible, ... set a little change with 25MHz in LD2+3+4 ... 2500-->2525MHz

I used this approach instead of only lowering the tolerance from 48 to 42, and it works much better. This way, I see an increase in my TimeSpy score rather than a drop, and my peak power draw during games is slightly lower.

Can the curve be optimized further for a max clock of 2660MHz in MCT or should I just keep it as it is?

 

[GerryB]

try and error
I would think 15MHz more = 6.25mV more works only in the best case, may be
at some point more additional mV are requiered

2660 maxClock (MCT) should be eff. 2600MHz
try LD4 = 2.600 with 0.131250 .... 0.134375 ... 0.137500

btw.
if stable, then as extra test, the other upper value only with 10MHz more with 6.25mV more
LD5=3.100MHz -->2.800 MHz with 0.256250 ... 0.262500
works only up to 2793MHz (MCT)

 

[cra3khead]

LD5=3.100MHz -->2.800 MHz with 0.256250 ... 0.262500

Lost about 80 points in TimeSpy, but, gained 1-2 FPS in 0.1% low of the Black Ops 6 Benchmark.

 

[GerryB]

OK, seems to be stable.
try some MHz more
LD4 = 2.615
LD5 = 2.815

btw.
if stable, then as extra test, LD5 = 2.850 MHz
(don´t know if LD5 has a impact, if the real eff. clock < LD4)

 

[cra3khead]

LD4 = 2.615
LD5 = 2.815

I tried LD4 = 2.625, but it crashed.

 

[GerryB]

I tried LD4 = 2.625, but it crashed.

OK, stay with LD4 2.620-->2.615

if stable, then as extra test, LD5 = 2.850 MHz
(don´t know if LD5 has a impact, if the real eff. clock < LD4)

now only more LD5
2.850--> 2.900 ... 2.950 ... 3.000 ... 3.050 .... 3.065 ... 3.075 ... 3.080
may be there is some headroom more in LD5

 

[cra3khead]

now only more LD5
2.850--> 2.900 ... 2.950 ... 3.000 ... 3.050 .... 3.065 ... 3.075 ... 3.080
may be there is some headroom more in LD5

It might be tapped out, LD5 = 2.865 crashes.