5770 Crossfire not using 100% GPU

[sal9000]

I have been playing Witcher 2 with nice 41 FPS and my GPU's running around 95% usage. Now suddenly and randomly my first GPU is only using around 70% and my 2nd GPU 40% and my FPS have dropped to an unplayable 21.
What would make my cards get lazy like this? I havent changed anything sense I last played.

 

[purple stain]

What CPU do you have?

What is the make/model of your PSU?

 

[sal9000]

965 AMD phenom black OC to 4.5
PSU is 750W apevia

 

[iam2thecrowe]

are you sure nothing has changed, havn't installed anything new, has wondows updated itself? Check your temperatures to make sure something isn't overheating and throttling back.

 

[purple stain]

^+1
Something must have changed if it was working fine before.

That Apevia PSU isn't of good quality but even if it can only deliver 500watts that's still enough to power a 5770 crossfire.

 

[sal9000]

are you sure nothing has changed, havn't installed anything new, has wondows updated itself? Check your temperatures to make sure something isn't overheating and throttling back.

I changed my CPU multiplier to 17.5 (from 17). I would hope that doesnt effect GPU. I know my power supply is the weakest link of my rig but its a pain to get a new one set up and it does its job.

 

[jjb8675309]

replace your psu immediately

 

[sal9000]

It's been working fine for a year and a half. There is nothing to show the psu needs replaced. My cards do perfectly fine in benchmarking programs

 

[sal9000]

replace your psu immediately

Is that even serious advice? I suggest defending your claim

 

[Fokissed]

install the latest crossfire profiles and try again

 

[sal9000]

install the latest crossfire profiles and try again

I am not sure what that is but this is a fresh instal of windows, newest drivers were found manually by me in the last 2 days. Everything is up to date. Let me stress the point that it 'did' work fine at one point.

 

[Fokissed]

"ATI Catalyst Application Profiles" download link.
example:http://sites.amd.com/us/game/downloads/Pages/radeon_win7-64.aspx

 

[sal9000]

"ATI Catalyst Application Profiles" download link.
example:http://sites.amd.com/us/game/downloads/Pages/radeon_win7-64.aspx

11.8 is the latest, thats what I have

 

[purple stain]

Nothing just goes wrong for no reason.Of course theirs always hardware problems but that's always just a small portion of something that can go wrong.The problem almost always has to do with the OS.

Have you tried any other games?Is it just Withcer 2 that you experiance it?

 

[kashifme21]

I have been playing Witcher 2 with nice 41 FPS and my GPU's running around 95% usage. Now suddenly and randomly my first GPU is only using around 70% and my 2nd GPU 40% and my FPS have dropped to an unplayable 21.
What would make my cards get lazy like this? I havent changed anything sense I last played.

Test out some other games, is the issue only happening with witcher 2?

I remember when Witcher 2 initially launched it had terrible SLI, Crossfire support. They patched the game for better support. Are you using the latest patch of the game? i think 1.03 thats the one that improves support for dual gpus.

 

[sal9000]

Nothing just goes wrong for no reason.Of course theirs always hardware problems but that's always just a small portion of something that can go wrong.The problem almost always has to do with the OS.

Have you tried any other games?Is it just Withcer 2 that you experiance it?

I went back and put my CPU back to stock speeds. On reboot my card said it was max heat, 0% useage, 0% fans.
reboot again. Game is back to playing at what it was except its around 60% each GPU and not 90%, but still its the same framerate as before.
I am going to consider this solved. reboot until it works

 

[purple stain]

Just try not to mess with the fan speeds.Sometimes if it's not on auto it will lock and overheat.

 

[ferny111]

I know that there was one update that really hurt the performance of the 5770 chipset SPECIFICALLY. I think 11.8 resolved the issue, but do more research on that. Hope that helps a bit

 

[sal9000]

Just try not to mess with the fan speeds.Sometimes if it's not on auto it will lock and overheat.

I have to use manual to get over 50% fan speed in CCC :/
so far so good. I have them at 70% because I want the cards under 75c

 

[sal9000]

I know that there was one update that really hurt the performance of the 5770 chipset SPECIFICALLY. I think 11.8 resolved the issue, but do more research on that. Hope that helps a bit

I have tested Crysis, Metro 2033, and Witcher 2 and have gotten greatly increased performance over a single 5770

 

[purple stain]

That's fine.Just as long as you use one program to adjust the fan speed.I've tried using other 3rd party tools and it doesn't work well with the CCC.

 

[sal9000]

That's fine.Just as long as you use one program to adjust the fan speed.I've tried using other 3rd party tools and it doesn't work well with the CCC.

I wish MSI afterburrner played nicely with it because its 'auto' speeds are smart enough to go over 50% fan speed, and are on that note full customizable.

 

[jjb8675309]

your psu is crap, crossfire drivers are crap for the low end crossfire customer period, get a new psu and I wont explain myself apevia is absolute garbage, if your value your components get a new psu