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Interesting problem...SLI the GTS 640 or buy a new G92?

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April 1, 2008 1:30:51 PM

ok this is with regard to an OP's dilemma...i found the problem rather interesting.

X has an 8800GTS 640mb. X wants more juice for gaming. His budget is not more than $200-$220. What should X do?? Should he get another 8800gts so he could SLI it up? Is that an improvement? Is the improvement better than one G92 8800GT or GTS? If yes, are there any benchmarks to compare one G92 8800GT/GTS with the 8800GTS 640........... or is there some OTHER solution?



April 1, 2008 2:29:21 PM

Well 8800GTS 640MB SLI is certainly better than an 8800GTS 512MB.
You dont really need any benchmarks for that.It's pretty straightforward.
April 1, 2008 2:40:19 PM

^ ..straightforward..how? Have you tried SLIing the GTS640? Have you compared it with the G92? Theres no concept of straightforward when it comes to SLI. Thats exactly why this thread is posted.
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April 1, 2008 2:55:46 PM

Obviously, it depends a bit on the game. Not every game takes full advantage of SLI. But, most of them do see some gains, and some of those see significant gains. While a single GTS 640 is slower than a GT 512, it isn't remarkably slower. When you SLI it, though, it should perform faster in just about every situation, assuming you are playing a game that can use SLI (which is just about every game, now days). So, if someone had one GTS 640, and they wanted faster performance, getting another will be faster than getting a GT 512. Now, the other factor is Resolution. As we all know, the benefits of SLI become apparent when running higher resolutions. So, lets go back to the scenario. If this person only ran games at 1024x768 with their GTS 640, they are not going to see a ton of gains with a second one, since most of the games they play probably run pretty high FPS already. Adding another one will give better performance, but they already had it. But, if they play games at 1650x1000 or higher, they would see some huge gains with the second card added. They would also see gains jumping to a single GT 512, but at the higher resolutions, they will still run into the same problems as having a single card.

April 1, 2008 2:58:17 PM

Well you are sounding as if "G92" is some sort of a monster or something.
8800GT is 10% better than the 640GTS and the new GTS is about 20-25% faster.You think SLI will bring only 25% increase?
Well maybe the new GTS will be able to keep up at lower res but certainly not at higher res and\or high AA.
a c 199 U Graphics card
a b 4 Gaming
April 1, 2008 2:59:33 PM

Another issue is power. Make sure his PSU has the +12V amps for the second card.
April 1, 2008 3:01:14 PM

I have gts 640's in sli. I can tell you that it allowed me to raise crysis from medium to high on a 22 inch monitor at its native resolution. To be honest, I haven't seen the gain I had hoped for compared to the money spent.
April 1, 2008 3:33:33 PM

I think that answers the question,

I could run Crysis will all high with 1680x1050 res. with a single 8800GT. Givin no AA but, that doesnt seam to make much of a difference anyway.
a b U Graphics card
April 1, 2008 3:43:32 PM

I was facing a similar dilemma and decided to wait a bit.

What I did to compare performance, I did right here at Tomshardware.

Open one window with single GPU, select the 8800 GTS G92, and in another window open up the dual GPU and select 8800 GTS 640.

That should give you an idea of what performance differences you'll get.

My solution presented itself, since my father-in-law wanted a new compueter, so I'm exchanging out the 640 (putting it in his computer) for the new GTS and will SLI later.
April 1, 2008 3:46:18 PM

aahz said:
I have gts 640's in sli. I can tell you that it allowed me to raise crysis from medium to high on a 22 inch monitor at its native resolution. To be honest, I haven't seen the gain I had hoped for compared to the money spent.


When did you buy them? Now, lets say someone has had one for awhile and wants to add the second one now, it can be a good upgrade, because they are much cheaper now than a few months ago. You yourself said you could up from medium to high in Crysis on a 22" monitors native resolutions (which I assume is 1650x1000 or higher). That is actually a pretty strong achievement, as Crysis is a bitch of a program to run.

No matter how you swing it, they are going to get more performance out of two SLI 640's than a single GT 512. Will it always be a lot more...? Not neccesarily, but it will be better.
April 1, 2008 3:59:37 PM

espslyxerx2 said:
I think that answers the question,

I could run Crysis will all high with 1680x1050 res. with a single 8800GT. Givin no AA but, that doesnt seam to make much of a difference anyway.
8800GT barely beats the 640GTS in crysis.So it's obvious that there is some other variable coming in here like other components,the amount of OC on the GPU and one's own "standards" for what is playable and what is not.And some people dont like to play without AA and AF.
http://www.techspot.com/news/27877-ati-radeon-hd-3870-v...
http://www.techspot.com/review/79-geforce-8800-gts-512/...

April 1, 2008 4:26:41 PM

aahz said:
I have gts 640's in sli. I can tell you that it allowed me to raise crysis from medium to high on a 22 inch monitor at its native resolution. To be honest, I haven't seen the gain I had hoped for compared to the money spent.


I have the same setup. Bought the first one for $400 and the second for $250. for me it was very much worth it. I saw the best SLI scaling in ETQW and COD4. Marginal improvement for Crysis, but I play it in DX9 hacked with some Very High settings at 1920x1200.
April 1, 2008 4:27:47 PM

^..Ok now....SLI isnt perfect..yet...SLI performance varies for different games and different GPUs.. even if card A is marginally faster than card B, it doesn't necessarily mean that the card B SLI would be faster than the single card A ....................thats exactly why this post becomes interesting...what should the OP do? Use 'em grey cells people! :) 

April 1, 2008 4:32:51 PM

mihirkula said:
^..Ok now....SLI isnt perfect..yet...SLI performance varies for different games and different GPUs.. even if card A is marginally faster than card B, it doesn't necessarily mean that the card B SLI would be faster than the single card A....................thats exactly why this post becomes interesting...what should the OP do? Use 'em grey cells people! :) 


Um I was just relating my personal experience with the setup in question.
April 1, 2008 4:36:27 PM

ok wait...by "^" i meant Thinker_145
April 1, 2008 6:18:40 PM

mihirkula said:
ok wait...by "^" i meant Thinker_145



Ah my bad, it did seem a bit out of place.
April 1, 2008 6:21:15 PM

Benchmarks..........anyone!!!??

Solution.......anyone?????
April 1, 2008 6:49:07 PM

Thinker_145 said:
8800GT barely beats the 640GTS in crysis.So it's obvious that there is some other variable coming in here like other components,the amount of OC on the GPU and one's own "standards" for what is playable and what is not.And some people dont like to play without AA and AF.
http://www.techspot.com/news/27877-ati-radeon-hd-3870-v...
http://www.techspot.com/review/79-geforce-8800-gts-512/...



I agree, my system was OC'ed quite a bit. But perhaps that gives him another option. Instead of spending extra cash on another VGA, to get marginal performance increases, he could OC the entire system and get the same marginal or better performance for spending no cash. This is assuming he has decent cooler's on his equipment.
April 2, 2008 3:18:31 PM

basketcase said:
When did you buy them? Now, lets say someone has had one for awhile and wants to add the second one now, it can be a good upgrade, because they are much cheaper now than a few months ago. You yourself said you could up from medium to high in Crysis on a 22" monitors native resolutions (which I assume is 1650x1000 or higher). That is actually a pretty strong achievement, as Crysis is a bitch of a program to run.

No matter how you swing it, they are going to get more performance out of two SLI 640's than a single GT 512. Will it always be a lot more...? Not neccesarily, but it will be better.


I bought them approx. one year apart. Can't remember the exact price of the second one however it was significantly cheaper. Res is 1650x1000 you are correct. I was pleased with the jump in Crysis actually, I had heard through the grapevine that a 512 gt could do what my sli was doing though so that was a bit of a bummer. That is all hearsay as far as actual performance so take it with a grain of salt. What I can say is...Crysis on high runs smooth with no AA on a pair of gts640's in sli... end of too much information!
April 2, 2008 3:57:26 PM

Ok the dudes using SLI 640mb GTS....can anyone of you pls use fraps and put up a few benchmarks? For three to four games...(Crysis included)
April 2, 2008 6:20:01 PM

mihirkula said:
Ok the dudes using SLI 640mb GTS....can anyone of you pls use fraps and put up a few benchmarks? For three to four games...(Crysis included)


I don't have tons of time, but I here are some screenshots for Oblivion and Crysis that I ran this morning. Not too in depth, but I hope it helps.



April 2, 2008 9:37:33 PM

I can run crysis smoothly with a 640GTS in high settings with 12x10 with no AA or 10x7 with 8XAA.

Although i personally play the game in 10x7 with 4xsuper sampling.
April 2, 2008 9:49:21 PM

I could run Crysis at 1680x1050 (or 1650 whichever it is) with all settings on High with no AA and get a solid 30 fps. The VGA was an OC'ed card to 750 core, and the cpu was a E6750 @ 3.6 GHz.

I just upgraded my pc, E3110 @ 4.2 GHz with a 8800GTS g92 @ factory OC'ed settings. I get a solid 35 FPS on the same settings above for Crysis.
a b U Graphics card
April 2, 2008 9:59:59 PM

This seems to be the topic of the day. It seems half of you should sell your cards to the other half so they can SLI their 640MB GTS. Then buy a couple G92's. :) 
April 5, 2008 1:09:00 AM

Without much effort I could OC my e6400 to 3.3Ghz, and my 640GTS to 630/1458/999, and end up with 11117 on 3DMark06.

SM2=4884
SM3=4989
CPU=2847

I've pushed it all harder before, but I was in a hurry to go to work. Can't really afford to replace anything if it up and broke on me, I'd be out of the loop for a whole week or 2, and I wouldn't be able to handle myself for that long.

Anyway hang on to that 640 for a while longer since when it's OC'd it's just as good as an 8800GT. Sorta.
April 5, 2008 1:33:40 AM

My suggestion is its still a good card, but I would sell it while it still has value. I would rather have a 65 nm Video card, less power drain then outputs better performance. But then again i would search the web for some benchmarks and see how much of a difference benchmarks are going to be.

If you are buying a new card, I would suggest the new 8800 GTS if ANYTHING or the 9800 GTX. I mean theres no point to step up to a 8800 GT because that would be pretty lousy investment. Unless your looking for more room in your case and less power consumption.

Personally I would go for a 9800 GTX, or a GX2 (just so you can be ontop of the food chain) but I kno there are alot of people that would be against the GX2 because of its price for now.
April 5, 2008 12:03:05 PM

T8RR8R said:
Without much effort I could OC my e6400 to 3.3Ghz, and my 640GTS to 630/1458/999, and end up with 11117 on 3DMark06.

SM2=4884
SM3=4989
CPU=2847

I've pushed it all harder before, but I was in a hurry to go to work. Can't really afford to replace anything if it up and broke on me, I'd be out of the loop for a whole week or 2, and I wouldn't be able to handle myself for that long.

Anyway hang on to that 640 for a while longer since when it's OC'd it's just as good as an 8800GT. Sorta.
Yes this site heavily oced both 8800GT and 640GTS and there was virtually no difference in the performance of the 2 cards when both were oced.Now i dont know whether you caould push 8800GT anymore on stock cooling or not.
http://xtreview.com/review219.htm
April 5, 2008 2:56:14 PM

for the price point.its worth buying new card only if you are getting the 9800GTX.but the GTS is not worth it.you get 640GTS for cheap these days.and SLI will beat the 8800GTS 512 easily.
April 5, 2008 3:35:15 PM

The GTS 640mb is avail for $239 and the 512mb is avail for $229 on newegg...crazy situation.......

And i would get two 9600GT cards rather than the misbegotten 9800GTsuX ....... maybe thats the solution...sell off the old GTS 640 and get two 9600 .... Palit 9600GT is avail for $110 on newegg... dammmnn!!! what a deal!!
April 5, 2008 4:30:48 PM

Actually I would take 2x8800GTS 640MB instead of 2x9600GT.The bigger bandwitch will come into play and be affective for high resolution and AA gaming.
April 5, 2008 5:15:34 PM

yeah you are right Thinker_145!!!
9600GT SLI never can beat 8800GTS SLI.dont know when you got that from!Single card is always better then dual card in most situation as some games doesnt support multi gpu configuration.

but in the uk its quite hard to find a 640 GTS.
April 5, 2008 6:00:04 PM

its saying your mum(9600GT) and dad(9600GT) weighs more than you(9800GTX).come on!talk in common sense!*sign*1 can never beat 2 from the same league!everyone know that.

but if you say 2 8800GTS 640 can beat 9800GTX that makes sense!

i say its worht upgrade to 9800GTX if you only wanted single card solution over the GTS 640MB.
a b U Graphics card
April 5, 2008 7:52:44 PM

iluvgillgill said:
its saying your mum(9600GT) and dad(9600GT) weighs more than you(9800GTX).come on!talk in common sense!*sign*1 can never beat 2 from the same league!everyone know that.

but if you say 2 8800GTS 640 can beat 9800GTX that makes sense!

i say its worht upgrade to 9800GTX if you only wanted single card solution over the GTS 640MB.

I have absolutely no idea what that meant??? :)  I agree that Dual 9600GT doesn't make sense for the OP when he has one 8800GTS 640MB. But two 9600GT did beat a 9800GTX in every game they tested which was the reason I posted as I don't agree one 9800GTX is a better option. And they are much cheaper in the USA $110 AR, offering more for the money than one 9800GTX. For the OP, a second overpriced 640MB GTS will offer more performance than upgrading to a 9800GTX.
April 5, 2008 7:58:52 PM

well if its a fresh build then 2 9600GT for the bargain price.but if you want ultimate performance 2 9800GTX cant be beaten unless you got 8800GTX/8800Ultra.
a b U Graphics card
April 5, 2008 8:15:07 PM

Oh sure I agree with that. Two 9800GTX perform well. Two much cheaper 8800GTS G92's would be more realistic for my budget (savings of $200+ here).
April 5, 2008 8:18:58 PM

in uk i can get 9800GTX in 8800GTS in the same price range.
April 5, 2008 8:24:07 PM

8800 GTS 640 SLI is the way to go.
Its not only 2 cards vs. 1 card, its also 320bit/640MB vs. 256bit/512MB
a b U Graphics card
April 5, 2008 8:28:56 PM

I'd love to see someone do a complete single & SLI comparison of the GF88xx's and 9xxx series. Two 8800GTS 640's may compete well with two 8800GT 512MB's. May even be situations where they could pull ahead (crysis with fsaa possibly?)
April 5, 2008 8:31:46 PM

iluvgillgill said:
in uk i can get 9800GTX in 8800GTS in the same price range.


Indeed Sir? ...lol...

That really sux....if its any consolation the price of the 8800GT in India is still $420.

Pauldh..those are some ironic prices there ainnit? :p 
a b U Graphics card
April 5, 2008 8:39:56 PM

$420, ouch that is sad. :( 
April 5, 2008 8:40:03 PM

i dont think anyone has those kind of "spares" in hteir cupboard.maybe some review site.like tomshardware??lol
a b U Graphics card
April 5, 2008 8:41:47 PM

Tom's doesn't buy any cards AFAIK. And Yeah, it is probably hard to get dual freebies of anything but a brand new release.
April 5, 2008 8:42:54 PM

in uk 8800gts £170-£240 9800GTX £210-£250

i would get the 9800GTX if i would have to buy a graphics system fresh from grounf up.
!