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SLI and Opty's

post #1 of 10
Thread Starter 
I've read on quite a few forums that if you wanted to run an SLI setup and truly see both cards power you needed a dual core processor. 2 cores 2 cards. I'm also reading now that the opterons, which are seriously out of my price range at current time, don't overclock very well and aren't meant for end users. First question is am I making a ( | ) of myself by even thinking that the first statement even holds water?!?! Second question is, is an fx enough to feed 2 7900gt?? I know I need to get new psu and more ram with the cpu and SLI upgrade but I truly DON'T make a mistake with the processor. Otherwise I wasted money on the second card and the whole upgrade period.... I've got time as my scrap pile isn't quite big enough for that yet but it will be soon. I'm expecting a lil abuse on this one but I really gotta know before I screw this up, so have at it lol

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post #2 of 10
You definatly dont need dual cores to run an SLI or crossfire system. Most programs aren't even multithreaded to take advantage of dual cores. Slap whoever told you that. Your powersupply should be fine for dual 7900s as long as it's actually putting out 500W, some cheap powersupplies fudge the numbers a bit.

BTW Opterons are fine overclockers, obviously certain models/steppings might be better then others.
post #3 of 10
Thread Starter 
Quote:
Originally Posted by Penicilyn
You definatly dont need dual cores to run an SLI or crossfire system. Most programs aren't even multithreaded to take advantage of dual cores. Slap whoever told you that. Your powersupply should be fine for dual 7900s as long as it's actually putting out 500W, some cheap powersupplies fudge the numbers a bit.

BTW Opterons are fine overclockers, obviously certain models/steppings might be better then others.
Read that blot of poo on the screen at SLIzone. Was just looking around and pop there it was. Another stupid question for me to ask here lmao. I think this xfinity they fudged on a lil bit and it only has 18amps on one rail. Not totally sure but was advised it probably wouldn't be enough. Thanks.
Back to surfing ebay lol

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post #4 of 10
where did u get that opty dun OC well statement? if u read it on a fourm, dun go there again since those people had no idea what they were talking about.

opty does OC very well, especially if u got a nice stepping. FX would be more than enough for SLI 7900GT. but of coz dual core will be always better, just becoz i like multithreading. i think u won't go wrong with either way, just get the one fits your budget.
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post #5 of 10
Quote:
Originally Posted by kool168
where did u get that opty dun OC well statement? if u read it on a fourm, dun go there again since those people had no idea what they were talking about.

opty does OC very well, especially if u got a nice stepping. FX would be more than enough for SLI 7900GT. but of coz dual core will be always better, just becoz i like multithreading. i think u won't go wrong with either way, just get the one fits your budget.
please can you use better english as mentioned in our TOS

right well opty's oc as well, if not better than most other cpu's if you get the good steppings.

you dont need dual core for SLi, it would help though, especially in benchmarks like 3dmark 06

what you could get is a 3700+ san diego, 2GB ram (G.Skill HZ's if you can find them) a new psu, something like a OCZ 600W or 700W gamexstream

you could then go SLi with 2 7900GT's and then overclock them

Edit: not sure if that mobo is true 2x16 pci-e - can someone confirm that
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post #6 of 10
Yeah it is 2 x16 . Yeah and optys are good overclockers but I doubt they would hold back 2 7900GTs that much. A single core that is clocked higher usually outperforms a dual core.
post #7 of 10
Thread Starter 
Quote:
Originally Posted by NrGx
Yeah it is 2 x16 . Yeah and optys are good overclockers but I doubt they would hold back 2 7900GTs that much. A single core that is clocked higher usually outperforms a dual core.
Speaking of which, if one card is at 16x and other slot is at 1x(empty), but when 2 are in it steps down to 8x and 8x, doesn't that actually decrease performance or do the cards run at 8x just as well??
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post #8 of 10
you cant put a graphics card in a pcie x1 slot, im pretty sure its different voltages and different slot size.

a dual or single core opty will be a great choice, however dont forget about the x2 3800, its starting to become the next 3700sd clocking around the 3ghz mark regularly.

Most SLI boards will either be , 2 x 8 lane slots, or 2 x 16 lane slots, either will do, and i havent seen any proof that one is better than the other, although 2 x 16 lane slots sound better lol.
    
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post #9 of 10
Trurth be told, a 2 x 16 board is only useful for the bandwidht eating cards (ie. 7950GX2). For 7900GTs however, 2 x8 should be more than enough.
post #10 of 10
Thread Starter 
Quote:
Originally Posted by NrGx
Trurth be told, a 2 x 16 board is only useful for the bandwidht eating cards (ie. 7950GX2). For 7900GTs however, 2 x8 should be more than enough.
Well that solves that problem lol. Now to SHOP!!! lmao

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