*** Official HD6XXX Series Overclocking Thread ***

[Dahaka]

ah ok, that's great , the BIOS is modded or default?.

I see 1100MHz on core soon, that will be an orgasm D:!

[SonDa5]

XFX HD6850 without voltage control. The speed of the ram is noteworthy on this card.

[Gaul]

@ tool = soon
@ sonda5 = nice 1000/1250, vantage plzz ....let me guess 16K gpu score

[CobraXP]

[SonDa5]

CobraXp nice benches.

What voltage are you running on your RAM?

[Gaul]

@ ^ = AB version ? mine lock up only 1 GH for GPU

[djmattm]

this question ask to ???

Sorry, @ Funky
@SonDa5-> Wow, i'm impressed, without overvolt we can achieve these results!?

[SonDa5]

djmattm

I am not sure if other HD6850s will go as fast as the one that I have. I might have just got lucky and picked up a fast one.

With voltage control I think it will go faster.

[SonDa5]

Gaul I don't know what AB version I have.

[Funky]

The core limit on his card might be higher because of the XFX bios.

Anyway, here is the maxed out core and memory ( cant go over these limits because of the CCC limits ).
This Asus DirectCU 6850 is running nice and cool. Under 65C even at this speed. Rock stable.
Those who are getting low scores in vantage, update to 10.10c hotfix. I found my card was not getting loaded properly. the log showed the GPU load was dropping to 70% for fraction of a second causing stutter i was seeing on the screen.
10.10c hotfix fixed it.

Here is run at 1000/1250.

[flopper]

heads up guys
http://forums.guru3d.com/showpost.ph...1&postcount=34

[CobraXP]

CobraXp nice benches.

What voltage are you running on your RAM?

1.63v from bios which equals 1.65v in windows

[Bullu$]

Watercooled, need to test more

[ScottyPimpin]

Just got my 6870 in today. runs rock solid at 1000mhz core clock but how do i increase the limit in afterburner 2.0 to get past 1k core clock?

[Gaul]

Just got my 6870 in today. runs rock solid at 1000mhz core clock but how do i increase the limit in afterburner 2.0 to get past 1k core clock?

u got the same problem with me...........

[Booj]

Hey guys

Here's my results. My card 6870 does 1000mhz without voltage increase

MSI R6870 2PM2D1GD5 w/ Cat 10.10 beta
i7 980x at 4ghz
MSI BigBang Xpower motherboard
6gb G.Skill 2000mhz c9 @ 1600 7-8-7-20
Thermaltake Toughpower 1200w
Windows 7 64bit

First up is my favourite game. 3DMark :leet:

3DMark 03


03 @ 900/1050 81040
03 @ 1000/1200 88004


3DMark 06

06 @ 900/1050 25370
06 @ 1000/1200 26111


3DMark Vantage - Performance

Vantage - Performance @ 900/1050 18488
Vantage - Performance @ 1000/1200 20233


3DMark Vantage - Extreme

Vantage - Extreme @ 900/1050 7744
Vantage - Extreme @ 1000/1200 8527


Unigine Heaven 2.1

Heaven 2.1 @ 900/1050 avg 34.0fps, score 855
Heaven 2.1 @ 1000/1200 avg 37.6fps, score 946

Some games now at 1920x1200


Crysis

Assault harbor test

Crysis Assault Harbour @900/1050 avg 34.91fps
Crysis Assault Harbour @1000/1200 avg 38.755fps


Far Cry 2

Far Cry 2 Ranch medium @ 900/1050 avg 98.03fps
Far Cry 2 Ranch medium @ 1000/1200 avg 107.64fps


STALKER: Call Of Pripyat

Sunshaft test

STALKER: CoP @ 900/1050 38.0fps
STALKER: CoP @ 1000/1200 41.9fps


Alien Vs Predator

AvP @ 900/1050 43.5fps
AvP @ 1000/1200 48.5fps

Cat 10.10 hotfix lists performance gains in AvP

Taken from my mini review here

[MacClipper]

Gaul I don't know what AB version I have.

Your screenshot shows AB 2.0.0 but there is something strange about the way Kombustor is loading your card at only 63% instead of full.

[Funky]

Your screenshot shows AB 2.0.0 but there is something strange about the way Kombustor is loading your card at only 63% instead of full.

Yup, i think he was using 10.10 when he took that screenshot.
Read my post here : http://www.xtremesystems.org/forums/...8&postcount=35
10.10c hotfix fixed that.
It was not related to kombuster only. In some games too the gpu was not getting loaded to 99/100% with 10.10. hotfix seems to have cured it.

[SonDa5]

Running Cat. 10.10c

Not sure why gpu load wasn't at 100% with the MSI kombuster.


It had some nice benches on 3dMark06 and Vantage.

[Gaul]

@ cobraxp = which brand 6870 u have ?

[T_M]

My gigabyte 6870 does 990 core before freezing in kombustor at 100% fan and ~22C ambient benchtop setup.
Using AB 2.1b2 i can easily get higher than 1000 core clock by setting >900, applying and then closing and reopening AB

[Blacklash]

Tried a Sapphire HD 6850 in my AMD rig for the heck of doing so. My nephew's getting the card when I'm done playing with it. It's doing 945|1150 stock voltage.

One hour of Kombustor.
http://img545.imageshack.us/img545/1968/6850oc.jpg

AvP 1920x default = 47.1FPS
http://img94.imageshack.us/img94/552/avp16850.jpg

I'm testing 990|1150 1.250 mV with Afterburner/Kombustor now.

[T_M]

Hmmm, since 6870 voltage control is not currently available but 6850 is - do you think its possible to flash a 6870 to a 6850?

[Daveburt714]

For anyone who might be interested:

Changing the config file in MSI Afterburner 2.1.0 b2 will allow you to take the CPU and Mem clocks much higher (1265/1495).
It still doesn't give voltage control though...

These changes work on my Sapphire 6870. It didn't really help for me, the best my card can do stable @ stock V's is 950/1150.

Go to the MSI Afterburner folder (should be in C:Users/username).
Open the file "MSIAfterburner.cfg" using notepad.
Edit the following 2 items:
unlockvoltagecontrol = 1
enableunofficialoverclocking = 1

Then use the "save as" option with File Type "All Files" and select Save.

This should let you run higher clocks than what CCC allows.

Hope this helps....... Dave

[ScottyPimpin]

Thanks for the help dave

Found the download for After Burner 2.1.0 B2.zip

Looks like 1k is all i'm getting out of my core clock, Kombustor fails at 1005 lol

is there any benefit from using furmark over kombuster?