Does 8800 GTX support PCIe x8 SLi?

[Track]

I heard that the new 8800s require "full" 2x 16 PCIe slots to work.

Is it true that u cannot install 2x 8800 GTX if ur motherboard only supports 2 x8 SLi?

Thnx!

P.S. If u could post a link to ur source, that would be great.

 

[Valtiel]

No we still aren't saturating 8x (2Gb/s?) bus transfer, it would run without a performance hit.

 

[f1nal_0men]

I heard that the new 8800s require "full" 2x 16 PCIe slots to work.

Is it true that u cannot install 2x 8800 GTX if ur motherboard only supports 2 x8 SLi?

Thnx!

P.S. If u could post a link to ur source, that would be great.

I can't remember where, but I have seen a system with dual 8800gtx and P5N-E SLI... I'm 99% sure you can go with 8800gtx x2 + 8x SLI

 

[Track]

No we still aren't saturating 8x (2Gb/s?) bus transfer, it would run without a performance hit.

2.5Gb/s actually.

No, obviously we arent. But the 8800s have been rumoured not to function at all under x8. Thats my problem.

 

[Parge]

No we still aren't saturating 8x (2Gb/s?) bus transfer, it would run without a performance hit.

2.5Gb/s actually.

No, obviously we arent. But the 8800s have been rumoured not to function at all under x8. Thats my problem.

I heard that as well, though the source escapes me now....

 

[Lionhardt]

well its obvious that valtiel is wrong, and that it will be half as strong!

8 +8 = 16 16+ 16=32!

so ur better off just using one 8800 on a 16x and giving the other one to me

 

[kaotao]

well its obvious that valtiel is wrong, and that it will be half as strong!

8 +8 = 16 16+ 16=32!

so ur better off just using one 8800 on a 16x and giving the other one to me

That's why there's also a HUGE difference between 4x and 8x AGP... :roll: It's obvious you don't know WTF you are talking about.
Half as strong... :lol: :lol: :lol: You can count, but you don't make ANY sense.

 

[merc14]

There was early problems with 8x and 8 series but new drivers have fixed it. There is a review here on the P5N-E SLI board.

http://enthusiast.hardocp.com/article.html?art=MTI0OSw3LCxoZW50aHVzaWFzdA==

At the end, one reviewer ran 2 x 8800GTX cards in it, coupled with a 6800 CPU for 15 hours without a problem. That siad, most benchmarks show a decrease in perfomance between the 680i and 650i chipsets when running two 8 series cards. 2x8800GTS suffers a couple of percent and the GTX loses more.

Bottom line is you can run two 8 series in 8x slots but you will suffer on the benchmarks for it.

 

[Crapola]

That can't be true.., otherwise, the Anandtech review of the 650i couldn't have been done...

http://anandtech.com/mb/showdoc.aspx?i=2894

8O

 

[prozac26]

You probably can.

And you won't notice a performance difference.

 

[merc14]

You won't notice the difference in a game but you will see it in the benchmarks. If you are a benchmark fanatic or FRAPS guy then you will get lower number. Not much but a little and this may be a bigger difference with DX10.

Personally I can't see the need right now for SLI with these beasts and plan on mouning my 8800GTS in a P5N-E SLI board. It gets all 16 lanes as a singleton and with a 1280x1024 LCD It'll be a long time before I can tap everythig even one card can do. If I ever go to two 8800GTS cards I'll worry about 32 lanes then.

 

[Valtiel]

well its obvious that valtiel is wrong, and that it will be half as strong!

8 +8 = 16 16+ 16=32!

so ur better off just using one 8800 on a 16x and giving the other one to me

Lol, silly little guy... I remember when I was like that :lol:

 

[kaotao]

Was he? Maybe at the end, but it seemed he was serious about the rest. Oh well. 8)

 

[Track]

You people arent getting the point..

8 lanes is enough for the 8800 GTX, that is clear.

The problem is compatibilty. According to this site, there is a problem!
http://www.theinq.com/default.aspx?article=36577

 

[merc14]

If by power you mean the voltage the card sucks up then yes I do understand that. The PCIe slot provides what it does regardless and separate hook ups via PCIe 6 pin power connetor(s) provide the rest. ALl I know is what I have read from the various review andtest sites regarding 8 series with only 8 lanes of PCIe available. There is a definite decrease in performance. It is an insignificant decrease but it is there.

From Anandtech: http://www.anandtech.com/mb/showdoc.aspx?i=2894&p=5

We had heard rumors that the 8800 GTX cards would thrive on the dual x16 capable 680i chipset but in looking at the results in our two test games it appears there is very little difference in the scores between the two nForce 600i boards. We did not have any issues running our 8800 GTX SLI setup on the dual x8 capable 650i board and only in the synthetic 3DMark benchmarks did we see any true separation between the two setups. Those results favored the 680i over the 650i by 8% in 3DMark06, 6% in 3DMark05, and in 3DMark 2001 the 650i actually finished about 4% ahead of the 680i. At this time, the current games we have tested will perform almost equally on either board in 8800 GTX SLI operation at 1600x1200. We also tested at 1920x1200 resolutions with the same results between the two chipsets. We still need to complete testing at 2560x1600 with the 650i chipset but considering the very small increase in performance in SLI mode with our test setup, we highly recommend the purchase of a single 8800 GTX for today's games and to forgo 8800 GTX SLI operation at this time.

So a 6%-8% difference in 3DMark05/06 between the 680i and 650i with two 8800GTX cards in SLI. Almost no difference in games. Most testers had similar results. My choice is get the 650i and pocket the nearly $300 in savings over the Striker Extreme.
I think this will change, and you'll see a bigger difference, with DX10 but that is a guess.

 

[merc14]

That problem was supposely fixed with the new drivers.

 

[kaotao]

I heard that the new 8800s require "full" 2x 16 PCIe slots to work.

You people arent getting the point..

8 lanes is enough for the 8800 GTX, that is clear.

Is it me, or do these statements contradict one another.

 

[prozac26]

You won't notice the difference in a game but you will see it in the benchmarks. If you are a benchmark fanatic or FRAPS guy then you will get lower number. Not much but a little and this may be a bigger difference with DX10.

Even in benchmarks the difference is negligible.

 

[Anoobis]

According to this site, there is a problem!
http://www.theinq.com/default.aspx?article=36577

Indeed, and that problem is the Inquirer.

 

[Track]

I heard that the new 8800s require "full" 2x 16 PCIe slots to work.

You people arent getting the point..

8 lanes is enough for the 8800 GTX, that is clear.

Is it me, or do these statements contradict one another.

Are u completely retarted??

The NEXT sentence after "8 lanes is enough" was "the problem is compatibilty".

 

[Track]

According to this site, there is a problem!
http://www.theinq.com/default.aspx?article=36577

Indeed, and that problem is the Inquirer.

Prove it.
How come there ARE boards that the 8800 GTXs dont want to be installed on?

 

[bfellow]

If you guys think you don't need SLI, then please have the spare 8800 GTX you don't want boxed up then please kindly mail it to me! :lol:

 

[tpmeredith]

Personally, I think if you're spending 1100+ on graphic cards, you should be able to spend 200ish on a motherboard that wouldn't be iffy about with something like this.

 

[kaotao]

Easy on the name calling buddy boy. What's wrong with what I said? Those two statements contradict each other. If you don't realise that, then it is you who is the retarded one.

 

[Valtiel]

I doubt you'll get very much help now. Good job.

Didn't you once say the 6600GT and the 9800pro had the same core... :roll: