View Full Version : Crossfire EAH 4850

12-14-2010, 09:14 PM
I just recently bought another copy of my video card for he purpose of crossfiring them.

I've noticed, however, theat since I've installed the second card, my games all seem to run worse instead of better.

For example, Need for Speed Hot Pursuit 2010 was running just fine with only one card installed, but now that there are 2 in there, the game takes almost 3 full minutes just to load the start screen, and when it does load, the game is incredibly choppy. I was also playing Singularity, and when I only had the 1 card in it worked great, but now that I have both in, I can't even change the screen resolution (if I try to change it, the screen goes black for like 2 minutes and then comes back up with the previous resolution as if nothing changed). And it's also incredibly choppy now. I can't even play it cause it looks so bad.

I thought having another video card and effectively doubling my video RAM would help, not screw me over.


12-15-2010, 12:06 AM
It could be drivers, you should be running the latest Catalyst drivers, You could also try do a fresh install after running driver sweeper.
OS registry could be damaged if you have been using it for a long time and switching different drivers without fully uninstalling and changing brands.

Elsewise, I would look at the power supply if It has enough power to feed both GPUs.
Anything weird happens in OS?

12-15-2010, 03:55 AM
Oh yeah... Running Windows 7 Ultimate 64 by the way : )

I haven't had any issues in Windows at all, other than the BSOD I got once after first installing the card. It just happened the one time, then I did a system restore and everything seemed fine.

Just to be safe though, I did a complete format & reinstall of Windows, and it didn't help at all. I'm running the next to latest version of the drivers as wel (I had let Windows update do it's thing, and then when I went to play Darksiders, everything was invisible but my sword. Rolled back the driver, and everything seemed fine.

As far as my power supply goes, I'm running a 650 watt with 6 pin PCI-E cables plugged into both cards.

Nothing makes any sense. Like I said, games were running better BEFORE I added my second card, which seems to be the opposite of what should be happening.

12-15-2010, 04:51 AM
Could you be more specific about the power supply's make and model?

12-15-2010, 08:06 AM
Hmmm, I was mistaken; it's actually a 700W. And it's a Retail Plus RP-PS24-700W.

I've got the MoBo, 2 case fans, 2 internal hard drives, and a DVD burner running off of it.

Also, thanks much for replying so quick. Other forums I've visited in the past have been slow as al hell : P

12-16-2010, 07:19 PM
It seems pretty hard to find info on this PSU. Have you tried each card alone?? Maybe the second one is defective? Also, are you using the crossfire bridge?

12-16-2010, 07:40 PM
Well I've got some news...

While screwing around with the card's settings and swapping them out in every which way and different configurations, I accidentally screwed something up, and when I booted windows, I wasn't getting a video image.
So I reformatted and reinstalled Windows, again. This time things seem to have gone better; I installed the new CCC version 2 that ATI just released, and it seems to have done some good.

I can now change the resolution setting within Singularity, thought the game still runs quite choppy. Need for Speed Hot Pursuit is also running better (wel, loading faster anyways, it still runs choppy as well).
It seems like things are working,but it still doesn't seems Like I have nearly the 1 gigof video RAM that I should.

Martin, I've tried each card alone, and they seem to work fine. And yes, the crossfire ridge is on there.

12-16-2010, 07:56 PM
Ok. Don't hope for double the performance, it's not working this way, but you shouldn't have drop like that. For now I have no other idea but I keep you update ifsomething come to mind!
GL with the issue!

12-17-2010, 04:19 AM
Well this is just pissing me off now...

I went to play GTA 4, which I could do no problem at full HD resolution and a few graphics setting lowered before installing the second card. And now, with both cards installed, this is the result of the benchmark test using the automatic settings:

Average FPS: 4.11
Duration: 10.46 sec
CPU Usage: 78%
System memory usage: 64%
Video memory usage: 64%

Graphics Settings
Video Mode: 1920 x 1080 (60 Hz)
Texture Quality: High
Shadow Quality: High
Reflection Resolution: High
Water Quality: Very High
Texture Filter Quality: Anisotropic x4
Night Shadows: Off
View Distance: 25
Detail Distance: 31

Microsoft Windows 7 Ultimate

Video Adapter: ATI Radeon HD 4800 Series
Video Driver version:
Audio Adapter: SPDIF Interface (SoundMAX Integrated Digital HD Audio)
AMD Phenom(tm) 8400 Triple-Core Processor

I couldn't even play the game at all. So I lowered some settings and tried again:

Average FPS: 9.45
Duration: 6.77 sec
CPU Usage: 73%
System memory usage: 63%
Video memory usage: 41%

Graphics Settings
Video Mode: 1920 x 1080 (60 Hz)
Texture Quality: Low
Shadow Quality: Off
Reflection Resolution: Off
Water Quality: Low
Texture Filter Quality: Anisotropic x2
Night Shadows: Off
View Distance: 25
Detail Distance: 31

According to the usage numbers in the game settings, I'm using about 600 megs of my 1 gig of video RAM. What the Hell????????

12-17-2010, 06:46 PM
after few hour trying to figure out spec of your PSU I point to that. This seems like a cheap staples unit. Probably a 350-400W branded as a 700W. The more it goes, the more I search and the less I find on your PSU, the more I think it's the issue. Do you have any spec of your PSU on the side of it like the 12V rail AMP and other thing like that?

12-17-2010, 07:33 PM
I'm not quite sure what you mean by rail AMP, and I'm not overly fluent in the meanings of voltages and things, so I drew up a copy of the sticker on the side : )


DC OUTP is actually OUTPUT
where it looks like -12V1, is actually +12V1

I think everything else is readable.

I'm going to be rather relieved if it turns out to just be my power supply, cause that's easy enough to fix. Finding another video card like mine was hard as hell though, and I hope I don't have to do it again.

Also, thanks again for your help.

12-18-2010, 02:16 AM

I went out and bought myself a $200 900 Watt Rocketfish PSU. It's SLI certified, so I figure it'll work with Crossfire just fine as well.

Well guess what?? Installed new PSU, booted up, tried GTA4, and it's still running as crappy as ever.
So I decided to just remove the second video card and just leave it for the time being. But after removing it, rebooting and trying GTA4 again, it's still running just as badly!!
And like I said before, the game totaly recognized that there's either 1 gig or 512 MB of video RAM in the graphics settings.
This makes NO SENSE, as it ran just fine before I ever installed the second card. I'm on the verge of just breaking down and taking it to a repair shop >: (

12-18-2010, 08:07 AM
Yet another update......

It seems all my troubles have been cause by ASUS Gamer OSD. I was doing every last thing I could think of in terms of configuring the cards and such, and on one attempt, I installed al the drivers and every program except OSD.

Now I have CROSSFIRE BABY!!!!!!!!!!

Every game, every graphics setting CRANKED, and everything is AMAZING!!!!!!!!!!

12-18-2010, 07:11 PM
Nice to see that you get it run. Just a little advice, next time you buy a PSU avoid Best buy and staples, they have crappy thing liek rocketfish. They are also over priced. For 200$ you could have get some better brand like kingwin, Corsair, Seasonic which are the market leader in performance and reliability.
Have fun with the rig :)

12-18-2010, 07:44 PM
I'm actually pretty impressed with the PSU. Rocketfish is a much better brand than frikkin Retail Plus : )
It's an actual SLI Certified Gaming PSU, and it's cooling system it waaaaay better than the other stupid one I was using.
And it's also got removable cords, so I only have to hook up what I need.

Then only game I was never able to run at al due to graphics issues with my old car was Need for Speed Shift, and I just reinstalled it to give it a go...

Every graphics setting at full, and it runs like a frikkin DREAM!!!!!!!!!!!!!!!!!!!