Basically, since ive had this PC, Its been giving me little problems everywhere. Now they are just escalating whenever I try to solve anything, so I come here for help 
I have this motherboard, Asus M4A89GTD PRO AMD 890GX. http://overclockers.co.uk/showproduct.php?prodid=MB-392-AS
In the manual it says have the GPU in the lower Blue slot, and keep the VGA switch card in the upper slot to keep it running at 16x instead of 8x.
This thing,
Had those two in a month or two, all has been well, Just last week I bought Asus Xonar DS 7.1 PCI Sound Card http://www.overclockers.co.uk/showproduct.php?prodid=SC-006-AS&groupid=701&catid=11&subcat=
First of all I tried putting my 460 in the top PCIe slot and the VGA switch in the lower one as the soundcard is about a millimeter away from the card if left in the bottom slot. If I do this though, My monitor gets no signal, But I removed the VGA switch card, I get a signal but the card is only running at 8x.
So I left it as the manual says, GFX in the top, VGA switch in the bottom, sound card in the one of the PCI slots, No signal again.
Now out of the blue I get a new problem, because there was no signal, as it proved to work the last time, removed the VGA switch and booted up, only this time I was greeted by a bios screen, saying my current CPU does not support the core unlocker or something, Id never seen this screen before, I restarted, then the regular bios screen that pops up each time I noticed a change, its says only 3 cores active instead of 4, I go into CPU-Z and again, only 3 cores all of a sudden.
My CPU is a AMD Phenom II X2 Dual Core 555 3.20GHz Black Edition, if it makes a difference.
Sooooo erm..Help? What have I done to make a core disappear and what do I need to do to make my 460 use the correct speed in the PCIe slot?
Any help appreciated.

I have this motherboard, Asus M4A89GTD PRO AMD 890GX. http://overclockers.co.uk/showproduct.php?prodid=MB-392-AS

In the manual it says have the GPU in the lower Blue slot, and keep the VGA switch card in the upper slot to keep it running at 16x instead of 8x.
This thing,

Had those two in a month or two, all has been well, Just last week I bought Asus Xonar DS 7.1 PCI Sound Card http://www.overclockers.co.uk/showproduct.php?prodid=SC-006-AS&groupid=701&catid=11&subcat=
First of all I tried putting my 460 in the top PCIe slot and the VGA switch in the lower one as the soundcard is about a millimeter away from the card if left in the bottom slot. If I do this though, My monitor gets no signal, But I removed the VGA switch card, I get a signal but the card is only running at 8x.
So I left it as the manual says, GFX in the top, VGA switch in the bottom, sound card in the one of the PCI slots, No signal again.
Now out of the blue I get a new problem, because there was no signal, as it proved to work the last time, removed the VGA switch and booted up, only this time I was greeted by a bios screen, saying my current CPU does not support the core unlocker or something, Id never seen this screen before, I restarted, then the regular bios screen that pops up each time I noticed a change, its says only 3 cores active instead of 4, I go into CPU-Z and again, only 3 cores all of a sudden.
My CPU is a AMD Phenom II X2 Dual Core 555 3.20GHz Black Edition, if it makes a difference.
Sooooo erm..Help? What have I done to make a core disappear and what do I need to do to make my 460 use the correct speed in the PCIe slot?
Any help appreciated.
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