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GA-EP45-UD3P PCI-E Slots

  • Motherboards
  • PCI Express
Last response: in Motherboards
June 28, 2009 8:29:35 PM

I was just looking at the specs of my GA-EP45-UD3P on the website and i saw this :

1. 1 x PCI Express x16 slot, running at x16
2. 1 x PCI Express x16 slot, running at x8
(The PCIEx16 and PCIEx8 slots support ATI CrossFireX technology and conform to PCI Express 2.0 standard.)
3. 3 x PCI Express x1 slot
4. 2 x PCI slots

What does that bit in bold mean, why is it running at x8 even though its x16?
Since I plan on Crossfiring in the future what impact would that make if I'm running at 8x instead of x16?

PS: I will be using two 4870 1G vapor-Xs if that helps.

More about : ep45 ud3p pci slots

a b V Motherboard
June 28, 2009 9:59:53 PM

it means the slot is physically an x16 slot but electrically an x8 slot (so it can be use for a second graphics card)
June 29, 2009 1:22:38 PM

Thx mindless728, since it runs at x8 when I Crossfire that means both my cards will run at x8. Would that give me a performance blow compared to two cards that are running in 16x?