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Thread: GA-EP45T-USB3P CrossfireX question




  1. #1
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    Default GA-EP45T-USB3P CrossfireX question

    Hey all,

    I recently came into the above listed mobo and I have an old Intel Q9300 chip, and I'm thinking of putting together a modest gaming rig with a couple of Radeon 6850's.

    I've been reading a bit about this board on various sites, and I've read in a few places something that the 2nd PCIx16 slot will only run @ x8 if USB 3.0 support is enabled. So I'm wondering if it's true, and if disabling USB 3 support will enable my second PCIx16 slot.

    Hopefully that makes sense - this is my first experience with a Gigabyte mobo and I don't even have it in front of me yet, but it looks like quite a nice 775 mobo and as long as I can get Crossfire enabled, I'm pretty stoked to have gotten this for (basically) free.

  2. #2
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    Default Re: GA-EP45T-USB3P CrossfireX question

    I think if you disable usb3 it runs both pcie at 16x but I'm not 100% sure on that,what I am sure of though is even if second pcie slot runs at 8x you wouldn't see much if any performance loss,maybe at super high res or multiple monitors but not much
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  3. #3
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    Default Re: GA-EP45T-USB3P CrossfireX question

    Well, maybe 8x wouldn't cause a drastic drop in performance, but I'd rather not see any drop in performance when the solution could be as simple as disabling a feature that I don't even need, y'know? My rez. is 1920/1080 btw

  4. #4
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    Default Re: GA-EP45T-USB3P CrossfireX question

    Yes I agree,but you wouldn't max out the pcie even at 8x,with that res you'll be fine,I'm pretty sure it only gets reduced if usb3 is enabled,its same for p55 dunno about that mb though
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
    http://www.youtube.com/user/warren304#p/u Visit Me On Youtube

    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
    Just Uploaded New Battlefield 4 Video!!!!!!!!!!!!!!!!!!!!!!

  5. #5
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    Default Re: GA-EP45T-USB3P CrossfireX question

    If you enable USB 3.0 then yes they will run at x8, but if you are not using USB 3.0 you can disable that and they will run at x16/x8

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    Default Re: GA-EP45T-USB3P CrossfireX question

    Great, thanks for the info guys

  7. #7
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