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Method of ATI HD3870 X2 Overclock....
1. Run ATITool 0.27beta4 and go to setting page you'll see BUS:3,Dev:0 = GPU1 default clock show 411/450MHz and BUS:4, Dev:0 = GPU2 default clock show 825/901MHz... so select GPU2(BUS:4, Dev:0)
2. back to main page ATITool and you'll see on profile is show Default(825/901) so click "LOAD" and after click GPUZ will show 825/901MHz on card-2 but in clock bar ATITool will show 411/450MHz you don't interested it
3. For OC card type clock number in overclock-bar as 900/950 and enter... so after enter you'll see in GPUZ will show clock same you type in card-2
4. Close ATITool and run AMD GPU clocktool, see on device - BN:3, DN:0 = GPU1 and BN:4, DN:0 = GPU2... you'll see GPU1 run on default clock(825/900) but GPU2 will run same on you setting by ATITool 900/950(891/945 real)
5. Now you can overclock all GPU by AMD GPU clocktool and gpu clock will same both speed
Have a fun on OC and Benching
1. Run ATITool 0.27beta4 and go to setting page you'll see BUS:3,Dev:0 = GPU1 default clock show 411/450MHz and BUS:4, Dev:0 = GPU2 default clock show 825/901MHz... so select GPU2(BUS:4, Dev:0)
2. back to main page ATITool and you'll see on profile is show Default(825/901) so click "LOAD" and after click GPUZ will show 825/901MHz on card-2 but in clock bar ATITool will show 411/450MHz you don't interested it
3. For OC card type clock number in overclock-bar as 900/950 and enter... so after enter you'll see in GPUZ will show clock same you type in card-2
4. Close ATITool and run AMD GPU clocktool, see on device - BN:3, DN:0 = GPU1 and BN:4, DN:0 = GPU2... you'll see GPU1 run on default clock(825/900) but GPU2 will run same on you setting by ATITool 900/950(891/945 real)
5. Now you can overclock all GPU by AMD GPU clocktool and gpu clock will same both speed
Have a fun on OC and Benching
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