I built a new computer back last December of 2009 and have been using an MSI 4890 Cyclone graphics card. I am using Windows 7 and have been able to play all video games pretty much with maxed out settings without any issues. A buddy of mine has pretty much the same exact setup I have, but wanted to get a new video card. I decided I wanted to try out the crossfire capabilities and ended up putting his MSI 4890 Cyclone in my box to crossfire with my 4890 the other day.
Everything seems to be setup correctly and the crossfire shows as enabled in my CCC. The issue I am having is that any game I load up with crossfire enabled running with both 4890s causes my computer to instantly reboot. I've disabled crossfire and the games run fine. I also tested both 4890 cards by themselves just to verfiy that there isn't an issue with either card and they both tested just fine.
I don't think there is a heat issue because my computer always reboots at the same exact spot when I load up the game. I also tested other games and the same exact thing happens right upon startup. Any ideas? If you need any additional info from me, please let me know. Any help is much appreciated and thank you in advance!
Here is what I am running:
VIDEO CARD #1: MSI R4890 Cyclone OC Radeon HD 4890 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card VIDEO CARD #2: MSI R4890 Cyclone OC Radeon HD 4890 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card
PROCESSOR: Intel Core 2 Duo E8500 Wolfdale 3.16GHz 6MB L2 Cache LGA 775 65W Dual-Core Processor BX80570E8500 MOTHERBOARD: ASUSTeK Computer INC. P5E3 PRO Rev X.0x POWER SUPPLY: RAIDMAX HYBRID 2 RX-730SS 730W ATX12V V2.2/ EPS12V SLI Ready CrossFire Ready Modular Modular LED Power Supply RAM: G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model F2-8500CL5D-4GBPK
COMPUTER CASE: Antec Three Hundred Black Steel ATX Mid Tower Computer Case HEAT SINK: ZALMAN CNPS9500 AT 2 Ball CPU Cooling Fan/Heatsink MONITOR: Hanns·G HG-281DPB Black 28" 3ms Widescreen LCD HDMI Monitor 500 cd/m2 800:1 Built-in Speakers
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After doing some more searching and testing, I believe my power supply does not support the crossfiring of the two graphic cards. I was not aware of this when I built my computer because the PSU I originally bought said it was crossfire ready, but it only has dual 6pin PCI-E connectors and it turns out I need double (quad) that to crossfire and power both of my 4890s. The PSU I am currently using is only good if you are crossfiring two video cards that only require a single 6pin PCI-E connector each, where both my 4890s require two 6pin PCI-E connectors each.
I think another reason I purchased the PSU that I did was because I thought I read somewhere that you only needed a 600watt PSU to crossfire 2 Cyclone 4890s. Looks like I will need to buy a new PSU!