Matching brand video cards or not?

Discussion in 'OT Technology' started by o2, May 8, 2007.

  1. o2

    o2 Witty Title Here OT Supporter

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    Im getting a 2nd 8800gtx, do I need to get matching brands in order to SLI them? IM prolly not going to SLI them anytime soon, but in the future, I might if they release drivers that will allow for multi-screen setups in SLI mode.

    I have an Asus, but EVGA are $100 cheaper due to a rebate.
     
  2. deusexaethera

    deusexaethera OT Supporter

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    Yes, they have to be identical. Same way as you can't build a dual-CPU system with one Intel and one AMD, even if they run at the same speed.
     
  3. o2

    o2 Witty Title Here OT Supporter

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    Intel and AMD are totally different CPUs...

    These are both nvidia, and they are both 8800gtx. Same clock rate and specs. Just different brand.
     
  4. Create

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    Just like RAM, buy matched components. Don't feed your motherboard mistimed/unequal voltage feeds from any component.

    Your 8800 should have held it's value to a decent level. eBay and replace with a matched set. At the very least, buy the exact same card, but even that is a significant risk to your motherboard.
     
  5. Create

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    eVGA's high-end stuff is winning newegg's customer choice awards, despite my bad experience with a card a year-year.5 back.
     
  6. Wolf68k

    Wolf68k OT Supporter

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    No the cards do not have to be identical. nVidia released support for mixed SLI cards long ago....back in the 80.xx series of the drivers.
    http://www.slizone.com/object/slizone2_rel80.html

    Now the mix and match CPUs, that's true. At least for now. Who knows, maybe someone might try to make a mixed CPU mobo some day. Anything is possible.



    Cliffs of nVidia 80series drivers:
    Mix and Match Graphics Cards from Different Manufacturers
    Mix and Match Graphics Cards with Different Clock Speeds
    Mix and Match Graphics Cards with Different Memory Sizes
    Note: You must still use two graphics cards that have the same GPU
     
  7. Create

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    Wolf is getting a solid rep, IMO, for defying convention without regard for the consequences.

    Unmatched video cards will likely result in a fried motherboard. The architecture behind SLI needs to see consistency across the slots above all, not adharence to the core spec. Ex: unmatched cards give a very high chance of MB failure whereas matched but off-spec cards have a much lower chance of failure. Matched and spec cards obviously being the optimal.

    No, I've not actually done it with pci-e SLI. My experience stems from non-matched RAM and SLI PCI Voodoo2 video.

    Wolf's right in that the dirvers will handle it. Unles your MB is of the highest quality, I wouldn't even try testing if the MB can handle it. 60% chance it'll work indefinitely. 20% chance board frys when you actually run the cards full-speed. 20% chance a video card frys when you run the cards full-speed. Bad odds, IMO. Overclock is out of the question.
     
    Last edited: May 8, 2007
  8. deusexaethera

    deusexaethera OT Supporter

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    Wolf, the issue in my mind is not whether the drivers can handle it, but that cards from different manufacturers -- unless they are required to make identical boards in absolutely every respect -- are going to have minor variations in performance, and those minor variations are bound to cause problems.

    On the other hand, matched cards from the same manufacturer will not under any circumstances (excluding manufacturing defects) cause problems with each other.

    So the question is: just because something is theoretically possible, does that mean it is necessarily recommendable? I'll give you three guesses.
     
  9. Wolf68k

    Wolf68k OT Supporter

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    Wait. You're basing your argument that unmatched cards can fry the mobo on your experience with unmatched RAM?
    Did having unmatched RAM fry your mobo? If so, that's amazing since I ran unmatched RAM for about 2 years and never had a problem.

    Voodoo2? Are your fucking high to even try compare a card that might as well be 20 years old to a technology that is less than 5yrs old?


    Given the choice of running SLI with matched cards to mixed cards, and mixed even if the specs of the cards are the same but different vendors, I would rather be completely matched.

    All I was pointing is that yes it's possible to run SLI with mixed brands as well as mixed speeds and memory sizes.
     
  10. deusexaethera

    deusexaethera OT Supporter

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    See above point regarding the difference between "possible" and "recommended".
     
  11. Create

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    I base my experience on countless bad experiences when using unmatched components in computers that expect matched components.

    I further base my assertation on this line: I have eleictircal engineering experience and cost is greatly increased when building to handle input deviation. Since any manufacturer's core philosophy is to meet a minimum quality standard while maintaining low cost: It's safe to say you've got to spend the big bucks to handle unmatched cards without failure.

    I've been playing with desktops for ten years, both personally and professionally. I doubt any experienced-based argument from you, especially considering your recent posts in this subforum, hold much weight at all.

    It's just a question of who takes the time to really tear you a new one. God knows we've got enough ammo. I'll be nice. If jolly took the time, expect main-forum style with devastating support.

    Thrid bullshit run you've given. Even dork could start mocking, and he's mainly an administrator/software specialist.
     
  12. Leb_CRX

    Leb_CRX OT's resident terrorist

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  13. Create

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    Yeah, AFAIK o2 will take practical experience over bandwagon unjustified and anonymous opinions, especially since they were specifically searched for to justify the premise. '01 regular and no one's brung up logical fallacy?

    Ah fuck, forgot I was on OT.
     
  14. skinjob

    skinjob Active Member

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    I don't consider your experience with a 10 year old video card as practical. Given the nature of problem reports vs success stories on the internet, it shouldn't be hard to find cases of motherboard failure caused by mismatched SLI video cards if the probability is as high as you say. Maybe you should find some to back up your claim.
     
  15. o2

    o2 Witty Title Here OT Supporter

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    Hmmm maybe I should have posted this on HardForum. I got a pretty high end mobo (680i) but I dont want it to explode....
     
  16. Wolf68k

    Wolf68k OT Supporter

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    Ok so myself and the millions of other people around the world, professionals and noobs that have been running mixed RAM for years without a problem, well they are all wrong because you say so.
    Because you had a mobo fry because at some point after installed a mixed stick of RAM your mobo "fried". How the hell do you know it was a direct result of using mixed RAM? Could it be the mobo's age and use? Could it be that that one stick of RAM was defective from the factory to start with?
    What proof do you have it was a direct result of all things being perfectly fine but because of mixed matched RAM that caused the problem?


    Fuck no I don't recommend running mixed RAM, or video cards for SLI, but don't fucking sit there saying that if you do your shit will fry or just not work because you mixed things.

    All I was pointing, to you pointy head dipshits that can't read, is that deusexaethera said "have to be identical" which implies if they aren't they same then it flat out won't work. Where as I was saying, that's wrong it is possible. Where in the fuck did I ever say that I recommended it?



    I'm going to saying it once more. NO, I DO NOT RECOMMEND MIXING RAM OR VIDEO CARDS!!!
    Is it possible? YES.
    Running matched components is always the best way to go, but don't fucking sit there and imply it's not possible when it is.
     
  17. EvilSS

    EvilSS New Member

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    Guys, keep in mind that most video cards are manufactured using reference designs provided by the GPU manufacturer. So they are usually nearly identical to begin with if you get the comparable cards. Most only vary in timing (which can be manually adjusted with tweaking tools) and the RAM chip makers.

    Considering nVidia specifically supports it I doubt it would be a problem. Officially stating it works puts a lot of weight (and no small amount of liability on their behalf) behind it. If it was likely to damage the system no only would they not say it was OK, they would probably state explicitly that is was not. I'd say I would trust nVidia's opinion on this over anyone in this forum's.
     
  18. Create

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    I'm saying if you run unmatched you'll be required to intervene in the computer's operation much more often.

    I've been doing this for awhile, but now that I have tens of boxes I'm responsible for I will never do it. For a laymen, who doesn't want to nor have the time to support what's really just a *tool*, don't do it. For an overclocker, who want's to push the limits at all, don't do it.

    If you're just trying to get by, go ahead. Running an SLI setup isn't trying to 'just get by', though.

    I believe in doings things right the first time, so that they don't break. If you want to half-ass and rig some shit up, tell me now so I stop wasting my time.
     
  19. Leb_CRX

    Leb_CRX OT's resident terrorist

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    wow, easy there pusscat, rawr, you're getting feisty

    you have no benchmark proof or anything of that nature that it wont work, here I took time out of my day to try to educate you, and you instead of thanking me for my wonderful efforts, attacked my great OG status...how dare you, I am quite offended by this and will email fazle at once! AT ONCE I SAID!

    for real though, you are saying based on previous experience that's 10 years old...HAHAHA computers change DAILY, you are going based on voodoo2 experience? HAHA just shutup and read the links, please
     
  20. Leb_CRX

    Leb_CRX OT's resident terrorist

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    GAWD ALL YOU 01's are the same

    I AM SO JELOUS!

    i AM GONNA GO LISTEN TO LINKEN PARK AND CUT MYSELF NOW!

    gAWD!
     
  21. Leb_CRX

    Leb_CRX OT's resident terrorist

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    shutup

    back your stupid claims up, show me in anyway how a computer will require any additional intervenance if they're unmatched, moreso then matched

    no you haven't been doing shit for a while besides being a stupid newb and tlaking shit like you have an idea...do yourself a favor, stfu and go sit in the corner, and TRY to learn something

    more people who've actually done it > you ASSUMING it wont work

    fucknut
     
  22. Leb_CRX

    Leb_CRX OT's resident terrorist

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    I am with you 100% wolf

    I'll wear a wofl shirt to work just to support your statements against this fucktard, and if anyone asks...I'll cliffnote them

    rock on brotha

     
  23. Leb_CRX

    Leb_CRX OT's resident terrorist

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    and I WOULD run unmatched video cards in SLI if it came down to it...I'd try to match them, but if not possible, I'd go with another card

    there's actual people running 'unmatched' video cards in SLI, and have had no problems...search for yourselves, it's not unheard of and is more common then you think
     
  24. o2

    o2 Witty Title Here OT Supporter

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    Gentlemen, relax. No need to start a flame war. :)
     
  25. Leb_CRX

    Leb_CRX OT's resident terrorist

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    but mommy, he started it :eek4:
     

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