I had some question.

[nickpokesyou]

if i have 3 PCI-E 3.0 graphic card.

my motherboard has 2 PCI-E 3.0 and 1 PCI-E 2.0, all x16

i run it Tri- SLI , what performance will i get?

[Wats]

Should work, though you might be disappointed. Which mobo? The third PCI-E slot is handled by the chipset (I think), which isn't going to be blistering fast and or have some issues.

[Helltech]

That third card is going to have pretty bad scaling. You may not notice a real word difference between SLI and Tri-SLI.

[nickpokesyou]

Should work' date=' though you might be disappointed. Which mobo? The third PCI-E slot is handled by the chipset (I think), which isn't going to be blistering fast and or have some issues.[/quote']

p8z77, the last PCI-E is 2.0

how much will it affect the performance compare to all 3.0 slots rather than 2, 3.0 & 1, 2.0

[Opsilon]

1. what motherboard do you have?

2. what chipset do you use?

3. if you use z77/z68 you can only get 1 slot working at 16x speed gen2/gen3 because you only have 16 lanes of PCI-E, but if you have x58/x79 then you get 36/40 PCI-E lanes so in that case you can get more out of your card, in gaming 2 x 8 lanes is good for 2 cards, lower than that there is no point.

4. today we can't get much more performance boost with PCI-E gen3 vs gen2, but in the future it might because the gen 3 bandwidth is 2x gen2

5. bottom line is that if you have a z77/z68 there is no point in running more than 2 cards because you get 8x4x4x configuration of the cards, if you have x58/x79 you can go up to 4 cards and can get up to 16x8x8x in 3 way SLI or 8x8x8x8x in 4 way SLI

6. 16x PCI-E size does not mean it can run at 16 lanes, so i am guessing your 3rd PCI-E slot is for sound cards and other cards that need lower bandwidth

[nickpokesyou]

1. what motherboard do you have? 2. what chipset do you use? 3. if you use z77/z68 you can only get 1 slot working at 16x speed gen2/gen3 because you only have 16 lanes of PCI-E' date=' but if you have x58/x79 then you get 36/40 PCI-E lanes so in that case you can get more out of your card, in gaming 2 x 8 lanes is good for 2 cards, lower than that there is no point. 4. today we can't get much more performance boost with PCI-E gen3 vs gen2, but in the future it might because the gen 3 bandwidth is 2x gen2 5. bottom line is that if you have a z77/z68 there is no point in running more than 2 cards because you get 8x4x4x configuration of the cards, if you have x58/x79 you can go up to 4 cards and can get up to 16x8x8x in 3 way SLI or 8x8x8x8x in 4 way SLI 6. 16x PCI-E size does not mean it can run at 16 lanes, so i am guessing your 3rd PCI-E slot is for sound cards and other cards that need lower bandwidth [/quote']

p8z77-v with 3770k

[Wats]

It's a good mobo, I would never put a video card in the 3rd PCI-E slot though. Try to use the every other slot before you use that one. Actually, try not to go SLI or Xfire in general.

[Guest]

More important question, why the hell do you need to tri-SLI on a mid power gaming system? I doubt you're running anything crazy in terms of displays..

[nickpokesyou]

More important question' date=' why the hell do you need to tri-SLI on a mid power gaming system? I doubt you're running anything crazy in terms of displays.. [/quote']

future upgrade

[Wats]

More important question' date=' why the hell do you need to tri-SLI on a mid power gaming system? I doubt you're running anything crazy in terms of displays.. [/quote'] future upgrade

What video card and case do you have currently? You would need 8 slots in your case :P

[nickpokesyou]

More important question' date=' why the hell do you need to tri-SLI on a mid power gaming system? I doubt you're running anything crazy in terms of displays.. [/quote'] future upgrade

What video card and case do you have currently? You would need 8 slots in your case :P

planning on msi 7970

erm. enforcer

[Opsilon]

More important question' date=' why the hell do you need to tri-SLI on a mid power gaming system? I doubt you're running anything crazy in terms of displays.. [/quote'] future upgrade

What video card and case do you have currently? You would need 8 slots in your case :P

planning on msi 7970

erm. enforcer

msi 7970 CF is a waste now since next gen will come out in a few months, single card is great, but if you do not plan on buying top tier cards at start of their release +6 months give or take you will just waste money, jut buy 1 and keep it till you can upgrade, but if you insist on 2 cards go for a 690 or "7990" cards because they use 16 lanes as intended so you get less heat, power draw, or noise vs 2 cards in SLI/CF X

btw your board is awesome just do not bother with more than 2 GPU-s with any AMD board so far or any Intel mainstream stuff.

[nickpokesyou]

More important question' date=' why the hell do you need to tri-SLI on a mid power gaming system? I doubt you're running anything crazy in terms of displays.. [/quote'] future upgrade

What video card and case do you have currently? You would need 8 slots in your case :P

planning on msi 7970

erm. enforcer

msi 7970 CF is a waste now since next gen will come out in a few months' date=' single card is great, but if you do not plan on buying top tier cards at start of their release +6 months give or take you will just waste money, jut buy 1 and keep it till you can upgrade, but if you insist on 2 cards go for a 690 or "7990" cards because they use 16 lanes as intended so you get less heat, power draw, or noise vs 2 cards in SLI/CF X btw your board is awesome just do not bother with more than 2 GPU-s with any AMD board so far or any Intel mainstream stuff.[/quote']

ok thanks,. i will think about it :)