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Windows 8 slow after USB3.0 adapter install

Last response: in Components
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April 11, 2014 5:52:51 AM

Hi,
I recently installed the ASUS U3S6 adapter on my build with windows 7 installed, in order to be able to use a new usb 3.0 AC wireless adapter. After I installed it with the supplied drivers, windows suddenly became unusably slow (opening two windows explorer windows resulted in about ten minutes of waiting for them to be accessable, and even the mouse seemed slow). This continued even after I took out the wifi adapter. I thought this might be a coincidence, and something else might be broken (or I broke something when I build in the hardware), so I have checked the memory with Memtest86, but it did not find any errors after two passes.

My next thought was that this was due to driver conflicts or that the windows install was simply broken. As I did not have any windows 7 installer anymore, but have access to a windows 8.1 licence from my university, I installed it from scratch on the ssd. This, again, was very slow. My next thought was that it might be the ssd, so I installed windows on the harddisk, and even though it is fractionally faster, it is still extremly slow in boot and mostly slow in responding. I am kind of out of ideas to search for errors now. I will probably buy a new graphics card, mainboard and processor at some point, but as this might be some way of (and as I do not want to do that, only to find out that there was something else causing the problem), I would still like to find out where this problem is coming from. Any Ideas for the next round of error searching?


CPU: Intel Core? i7 Quad Processor i7-920 (Noctua NH-D14 CPU cooler)
Motherboard: ASUS P6T SE, X58, Socket-1366
Memory: Corsair Dominator DHX DDR3 1600MHz 24GB (6 x 4GB XMS3 DHX, CL9-9-9-24 )
Storage: Intel® X25-M SSD 80GB 2,5" + Seagate Barracuda® 7200.12 1TB
Video Card: 2 x Radeon HD 5850
PSU: Corsair TX 750WPSU

I realize this build is kind of old, but I appreciate answers anyway ;) 
April 14, 2014 9:46:11 PM

I have now found that removing the card works, and the system is fast again. I would still like to install the card, and do not understand what could be the problem. As this is a pciexpress x4 card, i should not need to update the bios to make it work, right?
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