Installing 2 video cards

Can I install 2 PCI-E video cards with Core i5-760 and Asus P7P55D?

Asus Motherboard:
Expansion Slots
2 x PCI Express 2.0 x16 slots (single at x16 or dual at x8/x8 mode)
1 x PCI Express 2.0 x16slots (at x4 mode, 2.5GT/s)
2 x PCI Express 2.0 x1 (2.5GT/s)
2 x PCI

Core i5 Processor
PCI Express Configurations      1x16, 2x8

OS:
Windows 7
LVL 22
ThomasianAsked:
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PanicXCommented:
Yes
Asus's website shows that this motherboard supports both nVidia SLI and AMD crossfire
http://www.asus.com/product.aspx?P_ID=YhNWZrOT1OWycIgo

Your other main concern should be if your power supply can support multiple video cards.
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ThomasianAuthor Commented:
What is the difference between these 2 PCI-E slots?

2 x PCI Express 2.0 x16 slots (single at x16 or dual at x8/x8 mode)
1 x PCI Express 2.0 x16slots (at x4 mode, 2.5GT/s)


And why does the processor have a PCI-E config in its specs?
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PanicXCommented:
PCI Express is the technology that lets the expansion slots on your system board talk to the rest of the system.  Each expansion slot can have more than 1 PCI Express lane to let the device more bandwidth to talk to the rest of the system.

All three of the PCI Express slots support full sized cards (16x cards), however the first 2 share 16x lanes, which means if you use only 1 slot, it runs at 16x, but if you use 2 slots, it splits it in half.
The third slot is unaffected but always runs at 4x (slowest).
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PanicXCommented:
The processor specs are also listing chipset information.  Which is why you see integrated video as another one of the specs.
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Gary CaseRetiredCommented:
The PCIe specification shown for the CPU is for the embedded PCIe controller, which allows a direct connection to the CPU for the integrated video controller (if used).    This is different than the PCIe controllers in the chipset ... so the total number of PCIe lanes is dependent on the specific motherboard configuration and whether or not you're using the integrated video controller.

As for the specific slots you listed above:    The first two can provide a total of 16 PCIe lanes -- either with a single card in one;  or with 2 cards in each of them operating at x8.   The next slot will physically support an x16 card, but will only operate at x4 speeds (i.e. it supports 4 PCIe lanes).
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ThomasianAuthor Commented:
Thanks for the clear explanations
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