5870 crossfire overclocking results

[SmoulderingCircuits]

For those looking to pick up last gen bargains or want to keep their year old rigs up to speed with the latest, I thought it might be of use to you that I share these results for all my overclocking done over the past few days.

- The rest of the system is in my sig

- All overclocking was done in AMD Overdrive ONLY [CCC 11.6]

- Voltages were kept at stock

- Memory was kept at stock, ONLY core clock was adjusted

- All tests were carried out in Unigine Heaven 2.1 with the following settings: DX11, stereo 3D disabled, shaders high, tesselation normal, anisotropy 16x, AA 8x, 1600x900

- Before the final results were taken, a warm up benchmark was run first to ensure everything could attain maximum performance

- Fans at 90%

FPS are as follows:

850Mhz [Stock]

Min: 19.0

Avg: 55.6

Max: 110.9

860Mhz

Min: 17.7

Avg: 56.0

Max: 112.2

870Mhz

Min: 19.7

Avg: 57.5

Max: 114.4

875Mhz

Min: 30.8

Avg: 58.0

Max: 115.4

880Mhz

Min: 18.5

Avg: 57.8

Max: 115.5

885Mhz

Min: 30.8

Avg: 58.0

Max: 115.4

890Mhz

Min: 32.3

Avg: 58.1

Max: 116.0

895Mhz

Min: 27.8

Avg: 58.3

Max: 116.3

900Mhz

Min: 31.0

Avg: 58.2

Max: 115.5

----------

Total gain

Min: + 12.0

Avg: + 2.6

Max: + 4.6

 

[Nathlm]

Quite good try pushing them further with msi afterburner - you should easily get another 50-100mhz more

Oh by the way I was thinking of crossfiring my 5850, so were the gains of crossfire worth it - how much fps increase?

 

[SmoulderingCircuits]

Quite good try pushing them further with msi afterburner - you should easily get another 50-100mhz more

Oh by the way I was thinking of crossfiring my 5850, so were the gains of crossfire worth it - how much fps increase?

Some 5850s will clock as good as 5870s, others will hardly clock at all. The good thing about 5870s is you know you're getting the highest binned 5800 series. Btw you can crossfire your 5850 with a 5830 or 5870 if you want, it'll lower all clocks to that of the slowest card though.

I know I can use AB for higher but then I'm likely to wind up needing more volts and I don't like the sound of that - plus utility conflicts

 

[Nathlm]

Some 5850s will clock as good as 5870s, others will hardly clock at all. The good thing about 5870s is you know you're getting the highest binned 5800 series. Btw you can crossfire your 5850 with a 5830 or 5870 if you want, it'll lower all clocks to that of the slowest card though.

I know I can use AB for higher but then I'm likely to wind up needing more volts and I don't like the sound of that - plus utility conflicts

you mean like youtube blue screening I used to get that lol

 

[SmoulderingCircuits]

you mean like youtube blue screening I used to get that lol

I saw it on another 5870 overclock review and they couldn't get Overdrive to work once they had used the AMD GPU tool. Youtube greenscreens if you disable or enable crossfire while it's streaming

 

[Nathlm]

I saw it on another 5870 overclock review and they couldn't get Overdrive to work once they had used the AMD GPU tool. Youtube greenscreens if you disable or enable crossfire while it's streaming

also if you overclock with AB but you just have to set 2 profiles (2D and 3D) for it to work!

 

[SmoulderingCircuits]

also if you overclock with AB but you just have to set 2 profiles (2D and 3D) for it to work!

Maybe another day I'll try it but for now I'm happy with the couple extra frames on grueling settings

 

[Master&Puppet]

Oh by the way I was thinking of crossfiring my 5850, so were the gains of crossfire worth it - how much fps increase?

I've recently crossfired my 5850s, both OC'd in CCC at 775/1125. Here's some results of the tests I ran:

Furmark bench(1080)

Single 1794

Xfire 3313

Shogun 2 benchmark DX11 Graphics High 1080p (average fps)

Single 41

Xfire 78

Hope that helps

Just realised you posted in July...you've probably already made your mind up lol

 

[SmoulderingCircuits]

I've recently crossfired my 5850s, both OC'd in CCC at 775/1125. Here's some results of the tests I ran:

Furmark bench(1080)

Single 1794

Xfire 3313

Shogun 2 benchmark DX11 Graphics High 1080p (average fps)

Single 41

Xfire 78

Hope that helps

Just realised you posted in July...you've probably already made your mind up lol

Thanks for contributing either way