Question used 3700x issue

Mar 27, 2023
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im going to buy used 3700x and he says pcie 4.0 doesnt detect but pcie 3.0 works just fine. Is that problem in the cpu or somewhere else?
 
im going to buy used 3700x and he says pcie 4.0 doesnt detect but pcie 3.0 works just fine. Is that problem in the cpu or somewhere else?
If the CPU was installed in a B350/B450/X370 or X470 motherboard it will not "detect" PCIe 4 because it's not supported on those chipsets.

But if it was installed on a B550/X570 motherboard that's definitely a problem with the CPU if it doesn't detect a PCIe 4.0 device. If it was, I'd look for another processor.
 
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That’s a pretty good price. I’m from the USA but it sounds like a good price. If you are talking about it would just run a pci e 4 card at pci e 3, honestly from what I’ve seen at least on midrange cards you shouldn’t see a lot of performance loss. Even if you are talking about pci 3 for storage, pci e 3 is still pretty quick. So I guess look at what you are paying for the cpu and how you intend to upgrade later.
 
Mar 27, 2023
5
0
10
If the CPU was installed in a B350/B450/X370 or X470 motherboard it will not "detect" PCIe 4 because it's not supported on those chipsets.

But if it was installed on a B550/X570 motherboard that's definitely a problem with the CPU if it doesn't detect a PCIe 4.0 device. If it was, I'd look for another processor.
is it worth 70 if i buy b450 board and use pcie 3.0?