Jump to content

PCI Express 3.0


sean5900xt

Recommended Posts

I'm building a new desktop computer. I wasn't sure about how PCI Express 3.0 works. Right now the video cards im going to use are 2 Radeon HD 6850's. But in the future I would like to get a 7850 or better. I noticed the 7000 series cards say PCI Express 3.0. Does that mean that they require a motherboard with PCI Express 3.0, or they just take advantage of 3.0 if you have it but work with 2.0? I'm doing a AMD CPU build and I can't even find a motherboard that says it supports 3.0. Was just wondering about this. Thanks guys.

Link to comment
Share on other sites

That's what I was wondering. It seems kind of weird AMD wouldn't have a chipset that could support it. My guess is that its backwards compatible with 2.0 it just doesn't move data as fast as 3.0. But yeah it would be nice to know for sure.

 

Edit: Just saw TriRan's post. Thank you for the info man. That is what I was thinking. Glad to know though. And yeah I would think that the difference from 2.0 to 3.0 wont really make a difference for a while.

Link to comment
Share on other sites

I had the impression the difference between 2.0 and 3.0 was more than double the bandwidth ?

 

Actually yeah you are right. After some research it seems 2.0 supports 8GB/s and 3.0 supports 15.75GB/s. I wouldnt mind getting a 3.0 motherboard for a little bit more money, but there isn't a single AMD motherboard that I can find that supports 3.0. That's pretty weird of AMD to not support it I think. But I'm not sure how much if any at the moment of how much difference it makes in terms of framerate. Just glad to see it is backwards compatible. One more quick question instead of making another post. Right now I have a Corsair HX 750 Watt powersupply picked out. The build is going to have a eight core AMD FX and two 6850's. Would the corsair HX 650 watt power supply be plenty for a while. Or should I just got with the 750? Price dif. is only 10 bucks but I was just wondering.

Link to comment
Share on other sites

You are correct that the bandwidth is double but the place you will see that is when loading texture files into the video cards memory its not like your fps in games will more then double I doubt you'd see even 10 fps more and more wattage the better especially if you plan to get bigger video cards someday in the near future
 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...