Does water cooling increase efficiency?

[TheNaitsyrk]

Hello, 

 

I need some help understanding this:

 

I have 3090 Suprim X on air. About 70C max and uses 520W on KP BIOS in Heaven 4. All good, and as it should be.

 

Then I got a new EK block, great. Installed it and ran the same benchmark, only uses max 460W or so, but clocks are the same. 2160Mhz Vs 2160Mhz.

 

GPU temperature was about 32C Vs 70C on air cooling.

 

If I use Furmark it uses the entire limit of 520W and even peaks at 530W.

 

Superposition uses max of 509W at 4K optimised. However, mostly sits at either 480W or 500W.

 

Any ideas fellas?

 

Does this mean that my GPU reached its clock stability and more power doesn't do anything really so it doesn't use the rest of the limit depending on application? It did with air cooler so just curious.

 

517W is air cooled and 460W is water cooled on pics.

 

It also uses about 41-45W on PCI-E now Vs 56W it used to take on air.

 

 

[danalog]

Not really changes the efficiency of the card. Efficiency is an electrical thing that yes, it does have to do with power consumption, but a cooler card does not consume less power. Hope this helps.

[jaslion]

1 hour ago, wat3rmelon_man2 said:

Not really changes the efficiency of the card. Efficiency is an electrical thing that yes, it does have to do with power consumption, but a cooler card does not consume less power. Hope this helps.

Actually heat introduces expansion and resistance. So a colder running electrical component is a bit more efficient.

[TheNaitsyrk]

38 minutes ago, jaslion said:

Actually heat introduces expansion and resistance. So a colder running electrical component is a bit more efficient.

Yeah my card doesn't use 519W it used to in Heaven 4 it uses max 480W with average 460W or so now after being cooled down 40C down so it must make sense.

[m9x3mos]

31 minutes ago, TheNaitsyrk said:

Yeah my card doesn't use 519W it used to in Heaven 4 it uses max 480W with average 460W or so now after being cooled down 40C down so it must make sense.

Man that power seems really high for that clock speed. My fe card hits those frequencies with < 350.

[TheNaitsyrk]

1 hour ago, m9x3mos said:

Man that power seems really high for that clock speed. My fe card hits those frequencies with < 350.

Core clock stays the same yes, but performance went up according to benchmarks. Also, it's on purpose. KP 520W BIOS flashed 

[The Blackhat]

6 hours ago, wat3rmelon_man2 said:

Not really changes the efficiency of the card. Efficiency is an electrical thing that yes, it does have to do with power consumption, but a cooler card does not consume less power. Hope this helps.

Yes…yes it does actually. Cooler silicon pulls less power.

[Guest]

41 minutes ago, The Blackhat said:

Yes…yes it does actually. Cooler silicon pulls less power.

But you didn't tell anybody why!!

Cooler temps = less leakage. 

 

Quote

 

517W is air cooled and 460W is water cooled on pics.

 

It also uses about 41-45W on PCI-E now Vs 56W it used to take on air.

 

= OC headroom, you may take advantage of. Increase the Core frequency now. 

[TheNaitsyrk]

9 hours ago, ShrimpBrime said:

But you didn't tell anybody why!!

Cooler temps = less leakage. 

 

= OC headroom, you may take advantage of. Increase the Core frequency now. 

Never mind, issue not fixed.

 

I flashed 1000W BIOS and it only uses 45% of it, as if its power limiting itself when it shouldn't. Very strange. So this wouldn't be the power saving as it wouldn't be saving 350W because it's 40c cooler.

 

I also think that BIOS switch isn't working at all. Because I switch when PC is off, turn it on and it still has 1000W BIOS on. I'll flash both BIOSes few times to see if that solves it (even though when I switch it still says it has the 1000W bios on), otherwise out of options and I would have to try the GPU in another PC I guess / different PCI-e slot maybe regardless if it's 8x or 16x.

 

I might also try unplugging USB devices, that helped in the past.