*** Official Radeon HD5800 Series Overclocking Thread ***

[phsinc1]

Originally Posted by Unoid

I got my XFX 5850 in, runs like a champ. Now I got MSI afterburner installed and AMD GPU tool, but the gpu tool keeps telling me "device not found" I tried admin with it on win7x64

I take it I need n ASUS or MSI bios to flash? anyone got links to how to flash including commands etc?

Thanks

Here is the official unlocked ASUS 5850 bios
http://hotfile.com/dl/17667752/2859389/asus.rom.html

you will need a bootable usb stick and atiflash 3.75 and use this command:
atiflash.exe -f -p 0 asus.rom

[roller11]

using atiflash.exe in DOS,
atiflash -p 0 filename.rom -f

[Unoid]

Got MSi bios working flawlessly.
stock volts I see 900/1124mhz furmark/unigine stable. Got 47.4FPS in Heaven benchmark 1280x1024 windowed, all high 4AF
Stock clocks of 725/1000 same settings yields me: 40.8fps

[rickxbox]

Did already somebody change the stock cooling for somthing beter? I know that the Thermalright T-Rad2 and Twin Turbo pro would fit. But i beleave both coolers had a hard time cooling the VDDC.

[nickless]

For me MSI 5850/5870 unlocked is the best bios and Afterburner works perfectly. Here is my Sapphire 5850 with waterblock on the GPU only, flashed with MSI 5870 unlocked bios: @1112/1285 - 1.35v:

[Blkout]

Originally Posted by nickless

For me MSI 5850/5870 unlocked is the best bios and Afterburner works perfectly. Here is my Sapphire 5850 with waterblock on the GPU only, flashed with MSI 5870 unlocked bios: @1112/1285 - 1.35v:

1.35v, YIKES!

I got my two 5850's running at 1000/1250 at 1.274v but I'm not going to push any higher than that.

[phsinc1]

Originally Posted by Unoid

Got MSi bios working flawlessly.
stock volts I see 900/1124mhz furmark/unigine stable. Got 47.4FPS in Heaven benchmark 1280x1024 windowed, all high 4AF
Stock clocks of 725/1000 same settings yields me: 40.8fps

you got 900 core stable with 1.09v?

[nickless]

Originally Posted by Blkout

1.35v, YIKES!

I got my two 5850's running at 1000/1250 at 1.278v but I'm not going to push any higher than that.

This 1.35v is only for benching, for 24/7 1000/1200 it needs 1.237v. The main problem for higher numbers and stability is too hot VRM. Look what's happen during Furmark test with VRMs :

[Blkout]

Originally Posted by nickless

This 1.35v is only for benching, for 24/7 1000/1200 it needs 1.237v. The main problem for higher numbers and stability is too hot VRM. Look what's happen during Furmark test with VRMs :

That doesn't seem accurate. I would expect VDDC numbers in the 80-100 range with a stock cooler, but that is insane. My VDDC's only reach low 50's with EK waterblocks under full load.

[Blkout]

Originally Posted by phsinc1

you got 900 core stable with 1.09v?

No way that's possible. I'm not buying it. I guess everyone's definition of "stable" is different. About 10 Crysis Warhead loops on Frost at 1920x1200 at 4x AA should show how stable it is.

[M_T_M]

My first 3D Mark 06 with 5870

[dcl]

Is there a way to set idle clocks?

When I overclock my 5850, the idle clock drops from 400 to 157 which causes my second monitor to flicker.
Is there any other solutions?

[Mayke]

Originally Posted by dcl

Is there a way to set idle clocks?

When I overclock my 5850, the idle clock drops from 400 to 157 which causes my second monitor to flicker
Is there any other solutions?

U can create a custom 2d clock using msi afterburner. I tested it when i downloaded 1.4 and it works on my 5870

[cowie]

Originally Posted by nickless

This 1.35v is only for benching, for 24/7 1000/1200 it needs 1.237v. The main problem for higher numbers and stability is too hot VRM. Look what's happen during Furmark test with VRMs :
[

if those are the right vrm temps that card will be in broke pile in not too long

at 90c i get worried

[nickless]

Originally Posted by cowie

if those are the right vrm temps that card will be in broke pile in not too long

at 90c i get worried

I see these temps only during Furmark test and GPU-1.35v. In all other 3D test and games temps are between 70-80*C under load but for sure I put additional RAM sinks on the top of PCB above the VRM.

[dcl]

Originally Posted by Mayke

U can create a custom 2d clock using msi afterburner. I tested it when i downloaded 1.4 and it works on my 5870

Cheers, I'll check it out.