Pci-e 2 graphic card on pci-e 1 motherboard

[hhf]

hi!
ai have a AMD x2 3800+ processor, 2 gb RAM and Asus M2N-X motherboard with PCI-E x16 1 slot and i want to buy a PCI-E x16 2.1 graphic card (Radeon 5570 or Radeon 5670)- budget limited
Question 1:
Will i be able to enjoy the full power of the graphic card with PCI interface Express1?

Question 2:
given that the motherboard is a PCI Express x16 1 and the graphic cards are PCI Express x16 2.1 is worth buying radeon 5670 which is more expensive than the Radeon 5570?

 

[ilysaml]

Yes it will work without any problem, but it will use the maximum bandiwidth shared by the PCIE 1.0

 

[wa1]

^+1
Just make sure you get the 2.0 card and not 2.1.

 

[ilysaml]

HD 5670 is 2.1, and as far as i know there's no difference between PCIE 2.0 and 2.1
From Wikipedia

PCI Express 2.1 supports a large proportion of the management, support, and troubleshooting systems planned for full implementation in PCI Express 3.0. However, the speed is the same as PCI Express 2.0

 

[wa1]

http://www.newegg.com/Product/Product.aspx?Item=N82E16814102920
that's HD5670 2.0

The reason is many people report that 2.1 cards sometime works and sometime not on 1.x pcie slot. That's why I suggest him to get 2.0 card.

 

[ilysaml]

From AMD

627 million 40nm transistors
TeraScale 2 Unified Processing Architecture
400 Stream Processing Units
20 Texture Units
32 Z/Stencil ROP Units
8 Color ROP Units
GDDR5 memory interface
PCI Express 2.1 x16 bus interface
DirectX® 11 support

 

[ilysaml]

Anyway it doesn't matter, it will run just fine, i'm pretty sure of that.