I picked up 2 of the Sapphire 5870 Vapor-X graphics cards and for the life of me cannot figure out what the issue is that is causing this. The card that is plugged into PCI-E slot 1 works perfectly and the fan spins with no issue, however the card in slot 2 works but the fan will not spin. If I switch the cards around the same thing happens with whatever card is in slot 2. I upgraded from a pair of 4850 cards which worked perfectly and the both fans spun, however these will not. I contacted Sapphire Support and they stated that the fan on the second card would not kick on until the primary card is overloaded. That makes no sense, being that the second card would heat up to around 75c while the primary card would be around 55c under load. My system specs are below:
Alienware 750w power supply Asus M3A32MVP-DELUXE Mobo AMD Phenom II x4 955 @ 3.41Ghz 8GB G-Skill DDR2 RAM Sapphire 5870 Vapor-X @ 900/1300
Any ideas on what could be causing this issue?
More aboutsecond crossfire spin
does that power supply have four 6-pin PCI-E connectors? Also, what is the amp value on the 12v rail or rails?
Yes, the power supply has four 6-pin PCI-E connectors and the amp value on the rails is rated at 18amps.