Max. 24/7 HD4890 core voltage

[trakslacker]

Been working with an XFX 4890 the past few days and have been tinkering with voltage to see how far it'll go. Currently I'm at 1050 core/1185 mem 3DMark and Furmark stable, with a volt bump to 1.38v VCore. Card is aircooled, but core and VRM temps are both maxing out in the mid-70s C.

Assuming temps stay safe, what's the consensus on max. core voltage for 24/7 use? Also, has anyone played around with memory voltage adjustments on the 4890? Thanks for the input.

[SNiiPE_DoGG]

with good temps in order 1.45v is my 24/7 topend threshold - although I have pushed my 4870x2 on water to 1.5v 24/7 without any negative repercussions.

[trakslacker]

Thank for the response Snipe Dogg. This is generally inline with what I've seen elsehwere. Are we really the only ones here that are bumping voltage on these cards?

[SNiiPE_DoGG]

not sure, I think some people are just scared or something :rofl:

[W1zzard]

i'm seeing cards from aibs with 1.5v on the gpu and more

[G H Z]

1050 core Furmark stable on air is a damn good card :up:

[trakslacker]

Thanks W1zzard. I saw the TPU write-up on the Powercolor PCS card that had 1.5v being pumped through it stock, but didn't know if this was a truly one-ff thing or not. From your experience with these cards do you think 1.5v is actually safe or are some AIBs pushing a bit past the limit?

As always, thanks for your continued efforts with all the TPU apps (AtiTool, GPU-Z, GPUTool, etc). They are extremely useful to the community.

Do have one quick question regarding the artifact detector in GPUTool. when I push much above 1050 core I start getting artifacts detected, but its minimal (~2 pixels missing, only happens once per minute or so). I know that if its artifacting at all it's not truly "stable" (at least in my book), but does that level of artifact detection translate into actual gaming issues? I only ask b/c my time for gaming is pretty limited right now, so don't have a huge amount of time for testing. Thanks.


1050 core Furmark stable on air is a damn good card :up:

Thanks, it does hit a wall right at 1050 though. I can push it to 1.45 vcore and it really doesn't go beyond 1050. Given this thread though, I may try at least a limited run @ 1.5v and see if brute force and break the wall. :cool:

[W1zzard]

Thanks W1zzard. I saw the TPU write-up on the Powercolor PCS card that had 1.5v being pumped through it stock, but didn't know if this was a truly one-ff thing or not. From your experience with these cards do you think 1.5v is actually safe or are some AIBs pushing a bit past the limit?

i believe that to be safe enough for several years of use.


Do have one quick question regarding the artifact detector in GPUTool. when I push much above 1050 core I start getting artifacts detected, but its minimal (~2 pixels missing, only happens once per minute or so). I know that if its artifacting at all it's not truly "stable" (at least in my book), but does that level of artifact detection translate into actual gaming issues? I only ask b/c my time for gaming is pretty limited right now, so don't have a huge amount of time for testing. Thanks.
i wouldnt worry about it, but why not go to 1045 and be artifact free? there is no difference between 1045 and 1050 but in return you get 100% stability. i've seen games crash randomly (with very low probability) in such cases. wouldnt it be annoying if it crashes just at the worst time?

[BeepBeep2]

i wouldnt worry about it, but why not go to 1045 and be artifact free? there is no difference between 1045 and 1050 but in return you get 100% stability. i've seen games crash randomly (with very low probability) in such cases. wouldnt it be annoying if it crashes just at the worst time?

I think it's an e- thing.

If someone crashed from heat in FurMark but didnt artifact it might be different...

[Gaul]

so max for daily 1.45 v ??

[SNiiPE_DoGG]

Hipro says that unless you use 50mhz clock increments in the 4890 then the clock is not true (or something along those lines) so only 850-900-950-1000-1050-1100 are legitemate

maybe I am misinterpreting him or he is wrong but something to explore definitely.

[Gaul]

Hipro says that unless you use 50mhz clock increments in the 4890 then the clock is not true (or something along those lines) so only 850-900-950-1000-1050-1100 are legitemate

maybe I am misinterpreting him or he is wrong but something to explore definitely.

well easy to test , try 900 and 925 if no deffrent so hipro is right !

i'm in

http://i29.tinypic.com/10fqb1k.jpg

[SNiiPE_DoGG]

as soon as I am done photographing my system (lol) I will definitely test