2900xt and 2x6 pin

[Dogoid]

recently got a 2900xt and after finding out it needs 2x6 pin power cables to run at full speed {ccc limits clock and mem if detects 1x 6 pin } i ordered a extra 6 pin cable.


now when i view the clocks in Everest , they are still reporting the clocks at half speed , something which ati tool likes to call 'default speeds' , not happy, as default speeds should be 745 gpu 825 mem, so when i clock the speeds back up with ati tool , everest reports a 45% overclock and everything should be fine, until i quit ati tool and the speeds return to half again.


it looks like ati drivers are forcing the half speeds for some reason. i cant hold any clock change with ati tool. and my pcie bus is at x8.

before i put in the extra power cable, ccc would give me a message saying my card has not enough power and my clock speeds have been cut down , that message has gone. the power cable is connected fine.

also i have reinstalled the drivers. no change.



can anyone shed some light?

thanks

 

[IceShock]

the half speed clocks that you are seeing is 2d clocks, which the card runs at half speed when your not on a game so it doesnt run hot.

fire up a game and then check again and it will be in 3dclocks, unless of course you minimize the game.

as for the connectors, you dont need the +2 pin extra to run it at full, its just for ati CCC overdrive which is no more effective than overclocking with any other tool, iv tryed normal and a connector with the extra pins and it overclocks no further so therefor the extra pins is not needed.

 

[Dogoid]

ah, i didn't know this about 2d clocks. this makes sense. reg the cables. i have 2x6 pin powers connected. 1 in a 6 pin connector and 1 in a 8 connector. i hear those 2 extra pins are ground anyway.


cheers for that thanks