Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Perhaps I'm trying to push my mobo too hard, but I think I have read that PCI-e 3.0 is back compatible to previous PCI-e specifications. But 3.0 into a 1.0, is it possibly asking too much?

I'm thinking about buying an AMD Radeon HD 7750. My mobo is an Asus p5g41-m le

share|improve this question
up vote 6 down vote accepted

Yes, PCIe 3.0 is backward-compatible with all prior PCIe implementations. http://en.wikipedia.org/wiki/PCI_Express#PCI_Express_3.0

However, because PCIe 1.0 maxes out at 2.5 gigatransfers per second (GT/s) vs. PCIe 3.0's 8 GT/s, your video card may not perform as well as you would expect when installed in a PCIe 1.0 slot.

share|improve this answer
2  
If the card doesn't work in a PCI-Express 1.0 slot, it's not a PCI-Express 3.0 card. – David Schwartz May 22 '12 at 0:18
    
I rolled back my edit, but it still doesn't hurt to purchase from a seller with a generous return policy in case you're unfortunate enough to get a "PCI Express 3.0" card that isn't fully compliant with the spec. – rob May 22 '12 at 1:12
    
It worked perfectly. So, yes, it's fully compatible. – Karolinger Sep 15 '12 at 1:38

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .