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Old 07-02-08   #1 (permalink)
jei
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Default PCI-E x16x16 vs x8x8

Hey Guys,

I have a Asus M2N-SLI Deluxe with a BFG 8800 GT OC.

The PCI-E slots in the M2N-SLI Deluxe are only at x8x8 when you have it on SLI.

1.) Would it be worth getting another BFG 8800 GT OC? (considering it will only be at x8x8)

2.) How much of a performance drop is the x8x8 setting compared to the x16x16?

Thanks
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Old 07-02-08   #2 (permalink)
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The performance drop should be barley noticeable with 8800gt's.
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Old 07-03-08   #3 (permalink)
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why will it not be noticable with 8800 gt's? when will it be noticable?
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Old 07-03-08   #4 (permalink)
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Maybe 1 or 2 fps lower than 16x16

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Old 07-04-08   #5 (permalink)
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x16 isnt really a HUGE difference, as with 8800gt's dont really require much over 8 anyways.

x16 WILL be better, but if its worth an upgrade just for that... no.

I would wait though, get a new board in a short while and go with a 4870
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Old 07-05-08   #6 (permalink)
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its about 3% iirc drop in performance from 2x16 to 2x8.

makes you wonder about the why behind pcie2.....
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Old 07-05-08   #7 (permalink)
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i think its more for 'futureproofing' as far as it goes.

At least these board can handle gpus which require insane amounts of data over the pci-e bus, and users wont have to upgrade their board to be able to run these cards. I suspect the GTX280 might see a difference in 16 over 8
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Old 07-08-08   #8 (permalink)
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Quote:
Originally Posted by marsey99 View Post
its about 3% iirc drop in performance from 2x16 to 2x8.

makes you wonder about the why behind pcie2.....
What is "iirc"?

And also, considering that my mobo is only PCIE 1.1, not 2.0. & that it is only x8x8 in SLI, not x16x16, will i get a significant drop in FPS?
From what i am getting from marsey99 is that it will only be a 3% drop?

Also, i have a Antec Trio 550w as my PSU. Will this be enough power to run 8800 gt OC in SLI considering that i have my CPU oc'd? (in signature) The Antec trio has 3x 12 volt rails, each has 18Amps
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Old 07-08-08   #9 (permalink)
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Quote:
Originally Posted by jei View Post
What is "iirc"?

And also, considering that my mobo is only PCIE 1.1, not 2.0. & that it is only x8x8 in SLI, not x16x16, will i get a significant drop in FPS?
From what i am getting from marsey99 is that it will only be a 3% drop?

Also, i have a Antec Trio 550w as my PSU. Will this be enough power to run 8800 gt OC in SLI considering that i have my CPU oc'd? (in signature) The Antec trio has 3x 12 volt rails, each has 18Amps
iirc = If I Recall Correctly


The Antec Trio 550w does not have 3 18A rails.... the specs just don't say what it really can do. If it did, the PSU would be rated for 700-800w.
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Old 07-09-08   #10 (permalink)
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Here's a Tom's Hardware Review. Although the article is more swayed toward ATI and xfire it still does comparisons with Nvidia cards in x16 and x18 slots as well as comparisons with pciexpress 1.0 and 2.0. The review is a few months old but it is definitely a good read all the way through.

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