I have an Abit FP-IN9- SLI motherboard with an Intel 6600 Core Duo CPU. I bought a BFG 8800GTX 575/1800 and it ran awesome by itself on the mobo. 10,800 3Dmark2006 score. I am using Buffalo Firestix for memory.
A few days ago I decided to go the SLI route so I bought another BFG 8800GTX however, this one is the OC version (600/1800)
I also bought another PSU that I thought would handle the SLI config. (Coolermaster Real Power 850)
The PSU has 4 PCI-e 6 pin cables and I have 2 of them connected to each card.
I have 2 Seagate Barracudas (7200.10) runing in RAID ) and a sata DVD burner.
The problem is, when playing Call of Duty 2, I will be getting 250-500 FPS and then all of a sudden the FPS drops to 30-50 and then back up.
The last time I did it, I got out of the game and checked temps, The 8800 on top was at 79c and the one on bottom was 63c. Not really that high so I don't thinnk it was an overheating issue. I do have 2 120mm fans blowing on both.
Someone once told me that I should not use all the PCI-e connectors because they share a 12v rail, so I should just use 1 PCI-e connector and then one of the molex to PCI-e adapters for the second one on each card.
However, ecen after trying this, I still get the sudden drop in FPS.
Could the fact that I am using one card clocked at 575 and the other 600 be a the problem? or is 79c too high and its a heat issue?
Or is this PSU just not good enough for 2 8800GTX's
I am really puzzeled as to what is causing this.
Any ideas?
A few days ago I decided to go the SLI route so I bought another BFG 8800GTX however, this one is the OC version (600/1800)
I also bought another PSU that I thought would handle the SLI config. (Coolermaster Real Power 850)
The PSU has 4 PCI-e 6 pin cables and I have 2 of them connected to each card.
I have 2 Seagate Barracudas (7200.10) runing in RAID ) and a sata DVD burner.
The problem is, when playing Call of Duty 2, I will be getting 250-500 FPS and then all of a sudden the FPS drops to 30-50 and then back up.
The last time I did it, I got out of the game and checked temps, The 8800 on top was at 79c and the one on bottom was 63c. Not really that high so I don't thinnk it was an overheating issue. I do have 2 120mm fans blowing on both.
Someone once told me that I should not use all the PCI-e connectors because they share a 12v rail, so I should just use 1 PCI-e connector and then one of the molex to PCI-e adapters for the second one on each card.
However, ecen after trying this, I still get the sudden drop in FPS.
Could the fact that I am using one card clocked at 575 and the other 600 be a the problem? or is 79c too high and its a heat issue?
Or is this PSU just not good enough for 2 8800GTX's
I am really puzzeled as to what is causing this.
Any ideas?