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Overclocking in Crossfire

mk005
By mk005
in Graphics Cards
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Go to solution Solved by EChondo,

When you installed the second 7870, did you uninstall and reinstall drivers?

 

If not, you should do it. I overclock my 7870 HAWK cards with no problems. MSI Kombustor and Afterburner are great tools for testing stability.

Posted

I searched and didn't find anything terribly related:

Overclocking cards in crossfire: Good idea or no? I had a single 7870 and got another one for my birthday and I was getting artifacts and general instability (vga driver crashing and recovering bla bla bla).  Aside from the obvious cooling issues I could experience, is there anything special I need to keep in mind?

First Build:| Gigabyte 990FXa-UD3 | FX 8120 4.0Ghz | Coolermaster Seidon 240M | Asus Radeon HD 7870 | Kingston HyperX 3k 120GB SSD + WD Green 2TB HDD | Corsair RM750 | 8Gb Kingston HyperX 1866Mhz CL9| Fractal Define R4 White/Windowed |

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When you installed the second 7870, did you uninstall and reinstall drivers?

 

If not, you should do it. I overclock my 7870 HAWK cards with no problems. MSI Kombustor and Afterburner are great tools for testing stability.

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https://linustechtips.com/topic/87170-overclocking-in-crossfire/#findComment-1182388
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I didn't do the full amd driver cleaning tool thing 'cause it removes EVERYTHING (like my chipset drivers 'cause I have an am3+ board) but I did download new drivers and uninstall the old ones.  Thanks for the info though, I'll try re doing my overclock when I have time.

First Build:| Gigabyte 990FXa-UD3 | FX 8120 4.0Ghz | Coolermaster Seidon 240M | Asus Radeon HD 7870 | Kingston HyperX 3k 120GB SSD + WD Green 2TB HDD | Corsair RM750 | 8Gb Kingston HyperX 1866Mhz CL9| Fractal Define R4 White/Windowed |

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https://linustechtips.com/topic/87170-overclocking-in-crossfire/#findComment-1182683
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I know this was supposed to already be answered but try this.

 

Plug a single card in. See what the voltage, Core clock, and memory clock is. Then take that card out and do the same thing with the other card.

 

Sometimes the voltage required can be different between the two cards even if they are the exact same part number.

 

Then take the one that has the highest stock voltage and make that one your top card.

 

 

You will get various issues if you do it the other way around including the driver crashing, Direct X error etc.

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https://linustechtips.com/topic/87170-overclocking-in-crossfire/#findComment-1182875
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