GTX765 SLI vs GTX780M

Just out of curiousity, which GPU setup performs better?

(I don't need tips or anything like that, or that I should go for 780M SLI (since I already got that), I just want to know which GPU setup performs better.)

 

About the same I think

Its
1536 cores running on 256bit bus
vs
2 cards with 768 cores running on a 128bit bus

 

That's interesting. Thanks for the info mate.

 

theoretically they should perform about the same, but I would tend to believe the single 780m would perform slightly better in real world applications because it doesnt have to interact with another card aka no microstuttering/latency and SLI doesn't scale 100 percent.

 

Sli scales 60-80% typically so yeah, 780m will crush through.

 

I'd say 780M would be better. There's always a possibility for performance loss with the SLI, and it terms of gaming if the game doesn't support SLI well (example: Arma 2 OA or DayZ) then you'll get the performance of only 1 of the cards.

 

Ooops forgot about scaling. duh.
2 cards generally scale 80-90%. So 765M SLI will be 10-20% slower than GTX 780M

 

Dual cards want to have a 30-40% advantage before they will actually be better.

 

Allright guys, thanks.

 

2 cards generally scale 60-80% not 80-90% (yes there are exceptions but 90% of games out there will be less than 80%). So really 30-40% slower, not to mention overclock potential of 780m is likely higher than an SLI combo.

 

Well according to anandtech, they found out something else with GTX 580.
I know you have tested SLI systems and written reviews before, so maybe somewhere between?

 

Yes you tyically see scaling around 75-77% on average.

Of course in this case that leaves you slower on a good application and a lot slower on a bad application.

 

And even with good scaling there's still the microstuttering that makes it feel like you're getting half of the displayed fps.

 

Well with nvidia its more input lag, they delay the frames a bit to smooth them out and reduce it.

 

Yes yes Yes. The 780m is definitely faster.
This does show for anyone who is considering an SLI system to get the absolute BEST GPU combo you can get. It does cost quite a bit of money to upgrade to the top tier notebook GPUs in the after market. The cards don't come down dramatically in price and for the time being, they will be relatively difficult to find outside of ebay. There are many pieces of your configuration you can skimp on (ram, HD, even CPU). Get the BEST GPU combo possible. A base GPU will likely play your games just fine. The i7s on Sandy Bridge and Ivy didn't really bottleneck too many games. Each successive generation adds about 10% clock per clock improvement. So realistically, the 4700 Haswell is about 20% faster than Sandy. I went for the OC 4900mq (I wish I could have swung the 4930) just for the few games that really do benefit from having a faster CPU. And I figured the 4900 will do the job for those very very few titles that do better with a higher 4 core clock frequency.

 

Notebookcheck just put up a test with the P370SM sporting a 765 SLi config, pretty near 780M performance.
Test Schenker XMG P723 (Clevo P370SM) Notebook - Notebookcheck.com Tests

 

I wouldn't say it's near, in some cases it's dead on, but in many other it's a lot less, plus 311 drivers vs 320 drivers which seems to boost the 765m single card performance by 10-15%, and likely will do the same with 780m.

 

Very interesting info :thumbsup:.