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Radeon 6850, power supply, mo-bo question

Last response: in Graphics & Displays
October 23, 2010 5:50:59 PM

Hey there,

First, let me admit up front I'm still learning, so if this is a stupid or obvious question, dont laugh too loudly :) 

For the computer a friend is helping me put together, I'd like the Radeon 6850, but I need to make sure it's going to fit with the motherboard and power supply I was planning on getting or find different ones that will.

The 6850 ( says it has a PCI Express 2.1 x16 interface. The motherboard ( has 2.0 x16. Is that going to be a problem? Id hate to start putting it all together and then notice there's one teensy thing out of whack that shuts down the whole process.

Also, I saw another poster asking about the 6870, and how it had some sort of unexpected issue with his power supply. Would this one ( work?

Im just a little nervous because the cards came out so recently, but I'd hate to drop back to my original plan (a 5770) when this one is only $20 more and is so much better.

Thanks for you help!
a b U Graphics card
a b ) Power supply
October 23, 2010 5:54:44 PM

2.1x16 is backwards compatible with 2.0x16, so dont worry. Actually a upgrade. 6850 sips power, so a single card could make it with a 450 watt PSU pretty easily. Thats 500. However a pretty pathetic 500 at that. Will it work? Yeah, but i wouldnt trust a PSU like that. If you havent already bought it, dont, if you have, it will work.
a c 236 U Graphics card
a c 165 ) Power supply
a b V Motherboard
October 23, 2010 6:53:16 PM

do you currently own that PSU? if not i suggest the xigamtek 400w. its cheaper and the thing peaks at 600w with Tom's latest review of it.
October 23, 2010 7:05:59 PM

Ha! That been the one I originally picked (on a recommendation from these forums) and then saw that the card required a 450, didnt realize that... yeah... ok. All is well. Thanks for your help guys!