Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Motherboard + Crossfire

16 Jun 2010   #1

Windows 7 Ultimate
Motherboard + Crossfire

I have an Gigabyte P55A-UD3 (ver. 1) It has 2 PCIe slots, 1 is x16 and the other is x4. If I run 2 HD5770's in Crossfire am I going to see a jump in FPS/Performance? Or would I be better off finding a mother board that has 2 PCIe x16 slots? I'm very new to crossfire/Sli, last computer I had in SLI had 2 VooDoo 2 from 3dfx. :-)



My System SpecsSystem Spec
16 Jun 2010   #2

7 Ultimate x64

16x4x Crossfire doesn't perform as well as 8x8x and is nowhere near 16x16x. However, two 5770's would not saturate an 8x8x lane. Unfortunately, you've got a 4x slot. Best advice: get a faster card or a board that supports at least 8x8x. 16x16x you could not make use of given two 5770s.

Putting current graphics cards in a PCI-Express x4 slot basically verges on madness and incurs a performance hit of between 25 and 33 percent. Even if the motherboard in question were especially cheap, the card’s price/performance ratio is affected immensely. When using an x8 connection, performance also decreases, albeit only by 7 to 8 percent.
From the conclusion.
Crossfire meets PCI Express 2.0 €“ More Lanes, More Frames? : Crossfire up to 20 Percent Faster
My System SpecsSystem Spec
16 Jun 2010   #3

Windows 7 Ultimate

My System SpecsSystem Spec

16 Jun 2010   #4

7 Ultimate x64

Oh yeah. Gigabyte has been coming out with some impressive stuff lately. Their ultra durable products are top notch.
My System SpecsSystem Spec
16 Jun 2010   #5

Windows 7 Ultimate

I have the GIGABYTE GA-P55A-UD3, so I wonder if I can just swap motherboards and not have to change crap on the OS install to use it...Would this board allow me to run at PCIe x 8 on both cards?
My System SpecsSystem Spec
16 Jun 2010   #6

7 Ultimate x64

Yes, you can run at 8x8x. No, you will not have to reinstall the OS.
My System SpecsSystem Spec

 Motherboard + Crossfire

Thread Tools

Similar help and support threads for2: Motherboard + Crossfire
Thread Forum
Asus P8Z77-V Motherboard or AsRock Z77 Extreme4 Motherboard you decide Hardware & Devices
crossfire Graphic Cards
Go Crossfire or Go New? Graphic Cards
Crossfire help!! Graphic Cards
To Crossfire, or not to Crossfire Graphic Cards
Will my motherboard support crossfire? Graphic Cards
Crossfire ? Graphic Cards

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 01:23 AM.
Twitter Facebook Google+

Windows 7 Forums

Seven Forums Android App Seven Forums IOS App

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33