half the hash rate

[critical]

i am trying to build a second pc, but there are 4 graphics card on the motherboard

2 is using pci-e 1x to 16x ribbon

weird, there are 2 graphics card that only get half the hash rate, could it be power supply not connected properly?

thanks

[1714816816]

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[critical]

4x5850

1200w coolermaster silent gold psu

[deslok]

I would check your configuration in the miner if you're accidently running a miner on the same card twice each will report roughly half the hash rate

[Jezzz]

Agreed.  You're like mining on the same card twice.  If you're using guiminer, check the dropdown under each worker and be sure they all point to separate gpus.

[teflone]

I
ve also noticed internet explorer can cause a half hash rate, whenever I watch a you tube video and exit abrutptly itseems to still stay resident and use half your GPU even if iexplorer isnt running

[deslok]

I
ve also noticed internet explorer can cause a half hash rate, whenever I watch a you tube video and exit abrutptly itseems to still stay resident and use half your GPU even if iexplorer isnt running

The most recent browsers are all including gpu acceleration and flash is as well your cpu is offloading video decode to the gpu. If you try it with some other modern browsers FF and Chrome and it does the same thing it's an issue with that revision of flash and your current ati drivers if not then it's between flash and ie or flash and the ati drivers.