Go Back   Computer Forums > General Computing > Hardware
Click Here to Login
Join Computer forums Today


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 02-29-2012, 11:47 PM   #11
Baseband Member
 
Join Date: Feb 2012
Location: Chicago, IL, USA, Sol 3 (Earth)
Posts: 21
Default Re: Crossfire Issue...Can't figure it out

I ran FurMark and passed the 15 minute burn in. The one thing that stood out for me...the first video card was at 1.125V at full load but the second was at 1.2V at full load. Is that just how the cards are referenced? Or do I not have enough juice in my PSU?
__________________

nbrikha89 is offline   Reply With Quote
Old 03-01-2012, 10:18 AM   #12
Fully Optimized
 
OhSnapWord's Avatar
 
Join Date: Jan 2012
Location: USA
Posts: 1,853
Default Re: Crossfire Issue...Can't figure it out

The PSU might not have enough juice. According to this:

Newegg.com - Recommended Power Supply Calculator.

You need a PSU capable of 585W. Personally, I think 600W is cutting it close, I would go up to at least 650W. Not enough power would certainly explain instability.
__________________

OhSnapWord is offline   Reply With Quote
Old 03-01-2012, 06:20 PM   #13
In Runtime
 
Macmaster4k2's Avatar
 
Join Date: Nov 2011
Posts: 184
Default Re: Crossfire Issue...Can't figure it out

only reason i could think of is that the cards are not compatible with one another since they are different brands? highly unlikely but i know of companies in general that would do things like that
Macmaster4k2 is offline   Reply With Quote
Old 03-02-2012, 08:29 AM   #14
Fully Optimized
 
OhSnapWord's Avatar
 
Join Date: Jan 2012
Location: USA
Posts: 1,853
Default Re: Crossfire Issue...Can't figure it out

The cards don't have to be the same brands but they do have to have the same GPU series.

e.g. one card can be a 5770 and the other can be a 5750
OhSnapWord is offline   Reply With Quote
Old 03-03-2012, 11:09 PM   #15
Fully Optimized
 
Indigo's Avatar
 
Join Date: Jul 2010
Location: USA
Posts: 1,866
Default Re: Crossfire Issue...Can't figure it out

The Newegg power supply calculator overestimates (by a large margin) power supply requirements. A better tool to use is eXtreme Power Supply Calculator
Indigo is offline   Reply With Quote
Old 03-04-2012, 04:36 AM   #16
Baseband Member
 
Join Date: Feb 2012
Location: Chicago, IL, USA, Sol 3 (Earth)
Posts: 21
Default Re: Crossfire Issue...Can't figure it out

It's about the same. That site told me on multiple accounts that I need 550W ish, after all my fans and such are accounted for. However, I still find that I have instability until I unplug most my fans. I believe that I just have a lack of enough wattage on my 12V rail. My fault for buying a PSU for just under 60 bucks. It's also 3 years old, and no 80 Plus certificate. I'm fine for now, but I know in order to fix the instability indefinitely, I'll need more power. Plus, it seems most games aren't optimized for AMD cards, let alone crossfire. My next big GPU purchase will probably be nVidia, though they take even more power. Thanks for the help everyone!
__________________

nbrikha89 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -5. The time now is 10:57 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.0