Video card questions

Dot Cong

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Will a PCI-E x16 card run in a PCI-E x4 slot? Also, what kind of PSU would be required to power say a HD3650 or HD3870? That's it for now, probably have a few more in the near future. Helping a friend with his build and also planning the next(better/smarter) upgrades for my rig.
 
Yes, a PCIe x16 will run fine in an older slot. You'll need at least a 450W power supply to run either of them.
 
You will lose a fair bit of bandwidth and you won't get the full performance of the card, but it will work.
 
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