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View Full Version : Battle Royale: SLI 32x vs SLI 16x


J-Mag
03-01-07, 06:13 PM
Well here is the most recent info out on the performance differences between a full 32 lane SLI config and a 16 lane SLI config.

http://www.techspot.com/review/45-nvidia-nforce-650i-sli-vs-680i-sli/

There have been some other sites to do this type of review in the last couple months that had conflicting results. Anyone else have some links?

buffbiff21
03-01-07, 07:00 PM
GOD I forgot how much I hate benchmarks.

Looks to me like there is no difference. :|

J-Mag
03-01-07, 07:04 PM
Looks to me like there is no difference. :|

Yeah that's the whole point. Why buy a mobo with 32 lanes for an extra couple hundred smackers when the $125 board does the job just as well?

Bman212121
03-01-07, 07:15 PM
That is really damn interesting... I figured that the 8800GTX SLI was going to need the more than 8x because it has been talked about since the 6800 days where the bandwidth would be needed on future cards. I wonder if a Single GTX takes a performance hit in an 8x slot versus a 16x slot.

I'm going to have to look that up now, cause if that's the case, I don't need a new board to go SLI.

methimpikehoses
03-01-07, 07:18 PM
I still haven't found a good enough reason to go SLI with $400+ gfx cards. Maybe it's my little 19" widescreen. Maybe it's my miniature e-penis.

buffbiff21
03-01-07, 07:30 PM
Maybe it's my little 19" widescreen. Maybe it's my miniature e-penis.

Heh..

Try hanging around at xtremesystems.

That forum will literally dwarf your e-penis's superiority complex, it it has one. :o

I try to limit the time I spend over there.

As for the motherboards, though, YES there is ABSOLUTELY no reason to get a 400 dollar mobo. The only reason i have my 680i is cuz I bought it right when it came out, and at the time there was no 650i cheaper solution. :(

J-Mag
03-01-07, 08:11 PM
I still haven't found a good enough reason to go SLI with $400+ gfx cards. Maybe it's my little 19" widescreen. Maybe it's my miniature e-penis.

SLI comes into its own at 1600x1200 4xAA and above.

OWA
03-01-07, 08:17 PM
Yeah, I didn't notice much of a difference (if any) when going from the A8N-SLI Premium to the A8N32-SLI Deluxe. Supposedly there are certain situations where the 32 helps though.

J-Mag
03-01-07, 08:25 PM
Supposedly there are certain situations where the 32 helps though.

If you look Quake 4 is CPU limited because both resolutions are the same FPS.
Also, doesn't seem as if AA was used, so this is the low end of the spectrum for such a beefy 8800gtx SLI rig.

stncttr908
03-01-07, 10:30 PM
If anything I'd go with the 650i plus from Asus for the dual GigE, etc., but then you're only $20-30 shy of the eVGA 680i. :D

jAkUp
03-01-07, 10:35 PM
Yeah that's the whole point. Why buy a mobo with 32 lanes for an extra couple hundred smackers when the $125 board does the job just as well?

Right now no, but next generation cards may push just enough bandwidth to make dual 16x slots interesting ;)

methimpikehoses
03-01-07, 10:39 PM
SLI comes into its own at 1600x1200 4xAA and above.

Right, a 22"-24" display usually? I suppose the next-gen titles will also benefit from SLI when you want teh AA and AF jacked up... Alan Wake, Crysis, QW, etc.

john19055
03-01-07, 11:49 PM
I have both a Evga 680i SLI and a Asus 650i SLI and they both get about the same frame rate ,with the 650i SLI I can overclock my CPU to 2040 but the memory will not overclock as high ,about 1000mhz ,With my 680i SLI it will only go to 1650 stable on the CPU but the memory will overclock 1200mhz and beyond.Even though the EVga 680i SLI cost more ,I think it is the better board not because it has two 16x PCIe lanes,but because it is more stable and voltages does'nt fluxuate as bad ,I think the 650i SLI just has a 3 phase power converter and the 680i SLI has 6 or 8 phase power converter.My voltages such as the CPU does not fluxuate at all with my 680i SLI and with my 650i SLI it does ,it will be 1.31v and jump to 1.38 where as my Evga 680i SLI stays at 1.35v and does not move.

Zelda_fan
03-02-07, 12:03 AM
Right now no, but next generation cards may push just enough bandwidth to make dual 16x slots interesting ;)

but by then we'll have next generation motherboards... and the cycle continues...

Absolution
03-02-07, 02:02 AM
i've come to the conclusion that there isn't such thing as a future proof mobo (thought it was my nForce 4 lanparty sli-dr - but i just moved to intel...) so from now on, ill get the middle range mobo's/maybe even low range

performance is neglable and $ would be better spent elsewhere

J-Mag
03-02-07, 12:39 PM
Right, a 22"-24" display usually? I suppose the next-gen titles will also benefit from SLI when you want teh AA and AF jacked up... Alan Wake, Crysis, QW, etc.

Yeah or even smaller CRTs. I play some games at 2048 x 1536 on my 21in CRT.

methimpikehoses
03-02-07, 01:14 PM
i've come to the conclusion that there isn't such thing as a future proof mobo (thought it was my nForce 4 lanparty sli-dr - but i just moved to intel...) so from now on, ill get the middle range mobo's/maybe even low range

performance is neglable and $ would be better spent elsewhere

I agree, espec. with all these people having problems with their EVGA mobos and even the ASUS Strikers.

Get a mid-range mobo, then:

1. A good CPU
2. A good PSU
3. A good GPU

FTW :)