Is the gigabyte 970a-ds3p am3+ compatible with 2 Asus nvidia 660ti's?

Solution
So many folks read the marketing label: "2 PCI-E 2.0 x16 interfaces with AMD CrossFire support" but not the actual board specification: " 2 way AMD CrossFire™ (running at x16, x4 bandwidth)"

Here's my experience with that: (playing DiRT3, my favorite @ the time...)
- Single 5770 : ~50FPS (in x8 slot)
- Dual 5770's : ~55FPS (second card in x4 slot on Intel ASUS LX motherboard)
- Dual 5770's : ~100FPS (AMD system x16 / x16)
- Dual 5770's : ~95FPS (Intel system x8 / x8 ASUS PRO motherboard)

Lots of things effect the amount of impact an x4 slot has:
- the game
- monitor resolution
- CPU power
- GPU power (the more you have the bigger the impact)

But, there's always some impact for x4. There's a small increase in price to get x8 /...


Im aware of what the link says
But crossfire and crossfireX are different
In a crossfire or SLI set up the assigned graphics lanes are split between two graphics cards

CrossfireX is a hybrid system that lets a non-graphics pci-e lanes be used for a graphics card and is AMD only tech . The second slot is always a x4 slot electrically even if it is physically a x16 slot . It kills bandwidth to the second card in anything more powerful than about a radeon 7770 so its not suitable for high end set ups

And it cannot be used with the OP's nVidia graphics cards in an SLI set up

so , yeah , whatever
 

jb6684

Distinguished
So many folks read the marketing label: "2 PCI-E 2.0 x16 interfaces with AMD CrossFire support" but not the actual board specification: " 2 way AMD CrossFire™ (running at x16, x4 bandwidth)"

Here's my experience with that: (playing DiRT3, my favorite @ the time...)
- Single 5770 : ~50FPS (in x8 slot)
- Dual 5770's : ~55FPS (second card in x4 slot on Intel ASUS LX motherboard)
- Dual 5770's : ~100FPS (AMD system x16 / x16)
- Dual 5770's : ~95FPS (Intel system x8 / x8 ASUS PRO motherboard)

Lots of things effect the amount of impact an x4 slot has:
- the game
- monitor resolution
- CPU power
- GPU power (the more you have the bigger the impact)

But, there's always some impact for x4. There's a small increase in price to get x8 / x8 to avoid the controversy altogether.

As always, your mileage may vary...............

 
Solution
Correct jb6684 , and thank you for sharing your experience

but again it only works for radeons and the OP cannot SLI in that motherboard .

His cheapest option remains the
Asrock 970 extreme4
which actually runs a 990X chipset capable of SLI with the two x16 slots running at x8/x8