In reference to the comment about SLI and running one card versus two shows an improvement in FPS. I currently have two 8800 GTX's in SLI and have ok performance in FSX, would it run better if I removed a card and only used one? I do have SLI off in nhancer. Any thoughts?Thanks,John

Hi John,with SLI disabled there is no need to remove one card.

In reference to the comment about SLI and running one card versus two shows an improvement in FPS. I currently have two 8800 GTX's in SLI and have ok performance in FSX, would it run better if I removed a card and only used one? I do have SLI off in nhancer. Any thoughts?Thanks,John

Need to know your motherboard to answer this question definitively. If it's PCI-e 2.0 then there's likely to be no performance penalty incurred. If, however you have one of the first generation SLI boards or one of the cheaper more recent boards with PCI-e 1.x which splits up lanes between slots then you could lose CPU<->GPU bandwidth because of this which could cause a reduction in FPS.

Need to know your motherboard to answer this question definitively. If it's PCI-e 2.0 then there's likely to be no performance penalty incurred. If, however you have one of the first generation SLI boards or one of the cheaper more recent boards with PCI-e 1.x which splits up lanes between slots then you could lose CPU<->GPU bandwidth because of this which could cause a reduction in FPS.

Techguy,Here are my computer specs...Intel QX6600 2.66 GHZ OC'd to 3.2 GHZ4GB Ram DDR 800 MHZNvidia i680sli mother boardWindows XP pro(2) Nvidia 8800GTX (SLI)What do you think? It just always seems like there is a bottle neck with this system and I can't figure out what it would be. I know the 4gb of ram with XP is over kill.Thanks,John

Have done a new movie with my photocam ;-) Now you can see the smoothness without fraps running!LODRadius is set to 6.5000 and the ground is always crisp.http://www.youtube.com/watch?v=e_MqRV2gHnk

Techguy,Here are my computer specs...Intel QX6600 2.66 GHZ OC'd to 3.2 GHZ4GB Ram DDR 800 MHZNvidia i680sli mother boardWindows XP pro(2) Nvidia 8800GTX (SLI)What do you think? It just always seems like there is a bottle neck with this system and I can't figure out what it would be. I know the 4gb of ram with XP is over kill.Thanks,John

John,that motherboard is fine as it has a full 16 PCI-e lanes to each PEG slot. No need to remove the second card. Just disable with nhancer as you've been doing. Your bottleneck is likely your CPU clockspeed.

John; The cheapest good upgrade I see for your system is to move to a 64-bit OS (XP64, Vista 64, or the free Windows 7 RC). XP's hardware address mapping for the two 8800GTX cards are blocking (assuming they're the std 768MB variety) over 1.5GB of the 4 GB in your system from being used for anything except to produce heat. A 64-bit OS will move the video hardware memory mapping up above the 4GB boundary and return those currently blocked addresses for use in addressing the memory you already have installed. Barring that, removing one of the video cards is a good idea, as it will free up the same amount of memory address space as that card has in VRAM (i.e. 768MB). The next thing I'd consider is buying a couple 2GB sticks of CAS 4 DDR2 RAM that you can run at, say 1066MHz. Good, fast, low-latency RAM may help. Newegg has a 30-day return policy on RAM, so all it'll cost to try is shipping and a 15% restock fee.RegardsBob ScottColonel, USAF (ret)ATP IMEL Gulfstream II-III-IV-VColorado Springs, CO