ati radeon 4890 crossfire

[looksharp]

Hi i just want to know i put another 4890 in pc to crossfire and running antek 550 powersupply. as soon as i enable crossfire when games starts for instance MOD it gives me a blue screen and computer have to shut down error OS Name Microsoft Windows 7 Ultimate
Version 6.1.7600 Build 7600
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name JOHAN-PC
System Manufacturer INTEL_
System Model DP45SG
System Type x64-based PC
Processor Intel(R) Core(TM)2 Duo CPU E7400 @ 2.80GHz, 2793 Mhz, 2 Core(s), 2 Logical Processor(s)
BIOS Version/Date Intel Corp. SGP4510H.86A.0088.2008.0829.1839, 8/29/2008
SMBIOS Version 2.4
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume2
Locale United States
Hardware Abstraction Layer Version = "6.1.7600.16385"
User Name Johan-PC\Johan
Time Zone South Africa Standard Time
Installed Physical Memory (RAM) 2.00 GB
Total Physical Memory 2.00 GB
Available Physical Memory 1.04 GB
Total Virtual Memory 4.10 GB
Available Virtual Memory 2.17 GB
Page File Space 2.11 GB
Page File C:\pagefile.sys

 

[Archer]

I doubt this is a software problem, but rather a PSU problem
CPU - 65W
mobo - at least ±50W
Each hard drive - 5-10W
HD4890 - 190W

So you have at least 300W without a second 4890
Add another, and you need 490W. So now which exact model PSU do you have, since some of the lower end Antec PSUs will not be able to handle such a load (31.6A from the GPUs alone on the 12V line)

PS - we need to know your entire hardware config to be 100% sure

 

[killadoob]

You don't make mention of the antec but my antec power supply could run a 9800gx2 with a quadcore overclocked so if that is a the expensive antec with about 40 amps i am not certain it is the PSU.

Does it bluescreen all games? When you enable it can you run 3dmark?

 

[Pada]

It's not worth it to run 2x 4890 in CF. The performance per watt will be extremely poor.

You're most likely running into PSU problems, because the HD 4890's are really power hungry!
You'll need a PSU that can deliver at least 40A on the +12V rail for your setup, and that won't even allow you some room for overclocking either.