Will a PCIE-2 card work in a PCIE-1 MB ?

[worrek]

Hello, I have a 2y old pre-fab, it has a GS 9800 in it atm.I'd like to upgrade to the new HD 5770 but I'm worried it wont work properly.My MB says PCIE-1 slot, and the 5770 says it's a PCIE-2. What do you guys think? " btw my system is a http://www.newegg.com/Product/Product.aspx?Item=N82E16883113058

 

[hunter315]

PCI-E 2.0 just runs at 2x speed compared to PCI-E 1.0, so a PCI-E 16x slot has identical bandwidth to a PCI-E 2.0 8x slot. There likely wont even be a performance penalty on the 5770 from the reduced bandwidth, and it should work perfectly fine.

 

[worrek]

Thats great news, thankyou very much!