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Thread: Do I need a bridge for CF with a GA-EX58-UD3R




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    Default Do I need a bridge for CF with a GA-EX58-UD3R

    I just bought a used 4850 online to go with my 4830 and neither the 4830 or the 4850 come with a bridge. I don't have any experience with CF and the motherboard manual is vague on the subject. Do I need a bridge with the UD3R and if so do I need 1 or 2? Thanks in advance.
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    Default Re: Do I need a bridge for CF with a GA-EX58-UD3R

    Wont work in crossfire without a bridge. One will do. You do know that your 4850 will be degraded to 4830 performance, don't you?
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    Default Re: Do I need a bridge for CF with a GA-EX58-UD3R

    Quote Originally Posted by genec57 View Post
    Wont work in crossfire without a bridge. One will do. You do know that your 4850 will be degraded to 4830 performance, don't you?
    Ya, I was looking for a single slot 4830 since I don't have room for a 2 slot card. The only one I could find was an XFX model and they wanted a fortune for it. I found a HIS single slot 4850 used for $60 so I went for it. I run my MSI 4830 overclocked to 725 GPU clock and 1130 Memmory clock, stock is 585/900. The His 4850 being a single slot reference design probably wont OC very well so it will probably even out. I think the 4830 overclocked may even outperform the stock 4850.
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    Default Re: Do I need a bridge for CF with a GA-EX58-UD3R

    The 4830 is a cut down 48xx in more than clock speeds. It has 160 stream processors less than the 4850.

    IN games that don't use stream processors heavily, performance differences aren't huge, however when they are utilized it's more than noticeable. Plus the ATI drivers actually intercept and translate legacy instructions for things like Anti Aliasing and farm these off to the stream processor units too.

    You should be just fine gaming up to 1680x1050 with maybe a 20-25% handicap over two 4850's. You certainly wouldn't be able to realistically compensate for the missing stream processors by overclocking, as you'd need to be running damn high clocks c to compensate for 160 physically cut stream units. Also remember that even the crappiest of reference 4850's should do 700 core. My newer ASUS is happy at 765 Core and 2200 RAM.

    Set your 4850 to the master card in the primary slot, and when CF isn't worth running, or a game can't use it until a new driver release etc, you have your fastest card working for you. It's a shame as the 4830 will be holding it back, but like I said, by 20% in some games, with older games not noticing much.

    To answer your initial question, you will need a Crossfire Bridge. You only need one though. You would only need two if connecting three cards. You can grab the =m cheap (4/$7) on eBay. My cards didn't come with any either.
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    Default Re: Do I need a bridge for CF with a GA-EX58-UD3R

    Good info, thanks for the advice. I have a 22" inch monitor with 1680x1050 resolution. I'll keep on eye on 4850 prices, hopefully when ATI releases their new lineup people will be looking to unload their 4x00 series cards cheap. Until then I'm content since I was only looking for 4830 crossfire performance anyway and I got a decent deal on a single slot 4850. The increase in performance with just the 4850 in games that don't benefit much from crossfire is a nice bonus also.
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    Default Re: Do I need a bridge for CF with a GA-EX58-UD3R

    plenty of xfire bridges on ebay if you take a look,also some cards need two, well my old x1950 pro needs two bridges but you can tell if you look on the card and see one or two connections.....and why is it that the supplied bridges that come with my ud5 board are too narrow???
    Last edited by wazza300; 09-06-2009 at 07:36 AM.
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    Default Re: Do I need a bridge for CF with a GA-EX58-UD3R

    Quote Originally Posted by wazza300 View Post
    and why is it that the supplied bridges that come with my ud5 board are too narrow???
    The bridges that are included with the X58 boards are SLI Bridges and not Crossfire ones, that is why it looks narrow, it's for SLI.

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    Default Re: Do I need a bridge for CF with a GA-EX58-UD3R

    Quote Originally Posted by Lsdmeasap View Post
    The bridges that are included with the X58 boards are SLI Bridges and not Crossfire ones, that is why it looks narrow, it's for SLI.
    no theres one thats for sli with three joined connectors and one for ati crossfire with two joined connectors and there all the same width and too narrow seemslike gigabyte cant even get there crossfire bridges right, typical
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    Default Re: Do I need a bridge for CF with a GA-EX58-UD3R

    They are both for SLI, one for two card SLI and one for Three card SLI. This is stated in your manual, page 20
    GIGABYTE - Support&Download - Motherboard - Manual - GA-EX58-UD5 (rev. 1.0)

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    Red face Re: Do I need a bridge for CF with a GA-EX58-UD3R

    Quote Originally Posted by Lsdmeasap View Post
    They are both for SLI, one for two card SLI and one for Three card SLI. This is stated in your manual, page 20
    GIGABYTE - Support&Download - Motherboard - Manual - GA-EX58-UD5 (rev. 1.0)
    yes your right,my mistake i naturally asumed that gigabyte would provide ati bridges aswell as nvidia being there boards support either and ive only used ati cards so i wasnt familiar with the sli setup...
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