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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
Karolinger
Posted 2012-05-21T23:17:09.120
Reputation: 861
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Yes, PCIe 3.0 is backward-compatible with all prior PCIe implementations.
Reference Wikipedia: PCI Express
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.
rob
Posted 2012-05-21T23:17:09.120
Reputation: 13 188
And what about BIOS? I've heard some new videocards have BIOSes which are not compatible with mobos without UEFI BIOSes (which might include many older mobos with PCI Express v1.0)? – JustAMartin – 2016-11-27T19:27:53.123
@JustAMartin, I'm not familiar with that issue but I suppose it's possible. – rob – 2016-11-28T01:17:58.413
2If the card doesn't work in a PCI-Express 1.0 slot, it's not a PCI-Express 3.0 card. – David Schwartz – 2012-05-22T00:18:04.317
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 – 2012-05-22T01:12:22.533
It worked perfectly. So, yes, it's fully compatible. – Karolinger – 2012-09-15T01:38:22.760