Kepler vs Tahiti

[ambam]

In percentages, how much faster is the Nvidia "Kepler" cards over the AMD Tahiti?

Nvidia's flagship GPU is usually about ~10-15% faster than AMD's flagship.

I heard the Keplers are much more power efficient at around 200W, and run cooler than AMD's cards.

 

[hotthree]

Try about 340ish watts at full load. Its about 20-30 watts lower then 7970.

Its on averge 10%-13% faster.

7970 catches up in multi display. We do not have sli benches of the 680 yet to tell anything else.

 

[Chainzsaw]

The GTX 680 is a steal right now at it's price. It actually runs cooler than the 7970 and is more power effficient.

The 7970 and GTX 680 trade blows - however the 7970 is priced a bit higher than the GTX 680 giving it great performance per dollar.

It used to be the opposite - Nvidia GPU's used to be power hungry heat monsters - now the GTX 680 is a cool running beast with slightly better temps than the 7970.

 

[tydalwave]

I read two reviews today on 680's SLI'd. Seems from what I read and seen, the 7970 scales slightly better than the 680's SLI'd.

http://nl.hardware.info/reviews/2641/nvidia-geforce-gtx-680-quad-sli-review-english-version

and

http://www.hardwareheaven.com/reviews/1453/pg1/zotac-geforce-gtx-680-graphics-card-sli-performance-review-introduction.html


Edit: Also it seems that the 7970's are beating the 680's in many of the benchmarks ( I tend to concentrait my views to the monitor I use 1920x1200 ) but I'm sure with more mature drivers, the nVidia's SLI will fair a lil' better.

 

[de5_Roy]

techpowerup's performance summary:
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_680/27.html
performance per watt
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_680/28.html
performance per dollar
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_680/29.html

 

[Pinhedd]

Okay so here's the deal.

At stock speeds the 680 has a nice performance edge in most performance oriented applications (most games and some synthetics), it's obvious that NVidia spent a lot of time optimizing their drivers as they're not working with a brand new architecture like AMD is.

The 7970 has an edge in most image quality based and highly demanding games such as Crysis 2 and Metro 2033. Battlefield 3 is not a very good benchmark because it suffers tremendous image quality problems at large draw distances. Framerate stability is also better overall from what I've heard (resulting in the 7970 having lower peak FPS but higher minimum FPS). There are only a few games like this so I'm not surprised that the 680 takes the lead in most benchmarks overall, at stock speeds.

If history is any indication the 680 will be able to see a few extra megahertz squeezed out of its core (expect most cards to get up to around 1300 on the core) but It's unlikely that there is any headroom in the memory since their memory controller is already extremely aggressive. Since most benchmarks indicate that the memory bandwidth is already a limiting factor, don't expect these results to scale too well.

The 7970 is already known to be an extremely good overclocker with many users getting upwards of 30-40% overclocks without changing the power settings much at all or using aftermarket cooling. AMD shipped them with extremely conservative clock rates and this is currently biting them in the ass. Very few manufacturers are actually shipping the cards at the stock 925mhz and instead opting for a more common 1000mhz or even higher. 1100mhz is an effortless overclock which should put the 7970 above the 680 in most benchmarks without really trying.

 

[Devastater6194]

The thing about about this is that the gtx 680 is only the gk104. Rumor has it (yay more rumours) is that nvidia is planning to release the gk110 in August which should grind the 7970 into the ground. The only downside is that it's also likely o command an extreme price for that reason.

 

[borden5]

If nvidia releases GK110 in August, everyone buying a GPU right now is royally screwed, because GK110 was rumored to be like 40% faster than a 7970 (which makes it like 30% faster at least than the 680).

why not wait for gtx 7xx in 2013

 

[Devastater6194]

I'd guess it would give them time to release the 690 670 660 & 650 then the gk110. It would also give them time to improve it. Or maybe it's so advanced compared to the gk104 that they could release it as the 7xx by itself. It may be the 780 for all we know, releasing early to get the upper hand like AMD did with the 7xxx.