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

[Frogeye]

Is this a good score for 3dmark06?

[Shocky]

I've had three HD5870's now, two reference, all of them need 1.35V to bench at 1000 core and are unstable.

I don't think your 1027@1.27V for HD5870 represents average overclocks at all.

[Church]

I don't think your 1027@1.27V for HD5870 represents average overclocks at all.

Even under water?

[justin.kerr]

I don't think it is that rare on water..

[DuraN]

I've had three HD5870's now, two reference, all of them need 1.35V to bench at 1000 core and are unstable.

I don't think your 1027@1.27V for HD5870 represents average overclocks at all.

It is the average of all the collected data in this thread, cooling methods are listed. It is not something the OP has made up...

My XFX reference seems to be kind of a dud too, I can manage 1Ghz core runs in Vantage with 1.268v stock cooling and the fan on 100%, but it is not stable. If I up the voltage above that my screen starts to flicker no matter what clocks I set. Temps on core never pass 59c, highest VRM temp I have seen in GPU-Z is 66c. This card is annoying me

[Circaflex]

do i need to do anything different when running in crossfire? i have the msi afterburner utility but im not sure how i adjust both cards? same with CCC how do i adjust both cards?

[SonDa5]

Great thread.

[YGr7JiOETk]

Fan in the middle is not reference and can't softmod bios afaik. Sorry.

you are correct. everyone, try not to buy this version.

[nickless]

Here is CF5850, GPU under water, RAM and VRM on air in 3d06 and Vantage:

[Gaul]

anyone try sapphire 5870 vapor X ? can do overvolt with after burner ?

[Circaflex]

anytime i use afterburner to apply even a 5 mhz overclock i get a BSOD. Overclocking in CCC works fine though.

[Razrback16]

Great thread fellas.
Not sure how to take pics of my desktop and convert to .jpg but here is a pic of my card -- reference HIS 5870 with EK FC5870 Waterblock. Conservative overclock -- running 1.25v - 1000MHz/1250MHz -- I haven't tried pushing beyond either of those clocks to see if it would go higher. I have been told that the memory is tough to know when it's beyond its spec because it doesn't show artifacts? I wonder how much voltage I would need to hit 1050MHz core stable.

[maanyak]

Here is CF5850, GPU under water, RAM and VRM on air in 3d06 and Vantage:

sapphire 5850 soft vmod over 1350mv please tell how could I do this

[Circaflex]

Hey guys I am having some trouble overclocking my 5870s and im hoping you guys can help a noob out.

Whenever I used MSI Afterburner, even a small 5mhz increase right after moving the slider and hitting apply, i get a hardlock and a BSOD with an error code relating to a clock interrupt error. My system is stock at this point, no other overclocks.

The only other time i have seen this BSOD is when using the 10.5 drivers, anytime id do something 3d I would get the same BSOD. Is one of my card defective?

If i use CCC i can overclock no problems.

Could the BSOD be due to my dirty windows install? Or would you think defective hardware?

[Linuxfan]

Hey guys I am having some trouble overclocking my 5870s and im hoping you guys can help a noob out.

Whenever I used MSI Afterburner, even a small 5mhz increase right after moving the slider and hitting apply, i get a hardlock and a BSOD with an error code relating to a clock interrupt error. My system is stock at this point, no other overclocks.

The only other time i have seen this BSOD is when using the 10.5 drivers, anytime id do something 3d I would get the same BSOD. Is one of my card defective?

If i use CCC i can overclock no problems.

Could the BSOD be due to my dirty windows install? Or would you think defective hardware?

Look back in this thread a bit and you'll find the fix. Gotta change something in the registry to stop the crossfired cards from switching from 2D and 3D mode I think. Afterburner changes 3D clocks and it messes it up when overclocked. Pretty easy fix and worked for me.

[Circaflex]

is it the ULPS fix?

[Linuxfan]

is it the ULPS fix?

Yep, and it worked for me ran vantage with the 10.3s in W7 32bit...

[Circaflex]

sweet! solved my issue. now time to give these guys some volts.

[Razrback16]

sweet! solved my issue. now time to give these guys some volts.

Glad you got that resolved. I've followed your issue through the various threads -- now I'll also know what to do if I go Crossfire in the future and still want to overclock the cards.

[jacksonkid]

The best i can do is 865/1250 at 1.129 vgpu on an MSI 5850 Twin Frozr II. Anything between that and 1.149 is unstable no matter the clocks, and 1.150 and above kills the video signal the instant a 3D app is launched.

Makes me want to scream seeing all the 950 -1000 clocks all of you have been reaching. I'm sure this one would hit those clocks if i could just push the voltage to it. Apparently i'm not the only one with this problem so i would strongly advise everyone to steer clear of this card until it's fixed. If it's even fixable.

Anyone else having problems around ~1.150? I'm curious if i've just got a bum chip or if it's this card in particular. Pretty sure it's the card though.

No point in posting any scores as 865 isn't that impressive.

[klataa]

Hi guys!

I have a first expressions with 2x5870 and i have a problem with oc. Whatever i will set in afterburner or ati overdrive (core 950 mems 1300) score in 3dmark 2006 is always the same- 20 to 30 marks more or less. Im benching on 4,2 ghz so i think that its not to low. Any idea why i cant gain any FPS boost?

[YGr7JiOETk]

My max stable speeds are 939/1250 on stock, using XFX 4890 non-reference edition... (fan in the middle) pity the gpu voltage can't be increased for more stable overclock. the memory is touchy and does'nt overclock well, however there is little performance increase with overclocking memory as well. strange is that when overclocking there are no visual artifacts what happens is just the game will crash and then driver is re-set. must be the 5800 series gpus that started doing this, as i'm not used to how they behave now.

[Asmola]

These Zalman VF3000A's are working pretty good, here quick Vantage run with my 24/7 os, score is poor but i was just testing..


Here pic of my rig.

[NoGuru]

Looks awesome!

[Blademaster]

XFX HD 5850 BiosModed

CPU and GPU at Idle



CPU and GPU at Full



Last ATI Sapphire Reference Original Bios: http://www.techpowerup.com/vgabios/6...24.100122.html

Last ATI Sapphire Reference Original Bios Moded and used for me: http://www.mediafire.com/?tkwnyqnycg3