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[TPU] NVIDIA GeForce Kepler Packs Radically Different Number Crunching Machinery - Page 5

post #41 of 53
Quote:
Originally Posted by Dmac73 View Post

You have know clue what will beat what so shut your trap. All reports indicate GK104 > Tahiti. You have no inside info and are purley speculating so please go somewhere else.
Also, i said Kepler. GK104 is a mid range part which is still reported to beat Tahiti. Yes, these reports aren't confirmed, but i'll gladly trust them over your shoddy analysis strictly based on looking at the specs. You have no clue.
Just wait till release before you continue to spout off.
I'm still wondering how Nvidia's supposed to beat the GTX 580 a part with less bandwidth and (to a certain extent) lesser ROP-performance.

Even the 7970 craves bandwidth, going from 1250 to 1750 MHz on the memory gives about 15% more performance in games like Metro 2033 and Crysis where you'd assume the GPU to be mostly shader-bound. Considering the 7970 has more functional units than these alleged GK104 specifications and higher theoretical performance I have a hard time believing the GK104 will surpass even GTX 580, much less a 7970, without a lot more bandwidth.
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post #42 of 53
Quote:
Originally Posted by Nautilus View Post

I liked what i was reading until i saw the part about ROP count. Then i RAGED and closed the page.

Well you have to understand, this is the mid ranged GPU at the moment. So this in mind, this GPU should easily dominate the competition. A CUDA core is much more powerful than a single SP from AMD's side so the direct comparsion should allow this new architecture to fly past the 7000 series like nothing.

I wonder what the big badass GPU is going to be like...

3072 CUDA cores anyone? :3
     
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post #43 of 53
Quote:
Originally Posted by Imglidinhere View Post

Well you have to understand, this is the mid ranged GPU at the moment. So this in mind, this GPU should easily dominate the competition. A CUDA core is much more powerful than a single SP from AMD's side so the direct comparsion should allow this new architecture to fly past the 7000 series like nothing.
I wonder what the big badass GPU is going to be like...
3072 CUDA cores anyone? :3

Wishful thinking, unfortunately GK104 is the only part being released in the next 6 months aside from the GK104 parts with disabled CU's. So it is very likely that the GTX 680 will be based on a GK104 part. Furthermore, as much as i'd like to point out how you were championing the lenzfire specs a few weeks ago (lol), Kepler does not have hotclocking so it takes 3-4 Kepler shader units to equal 1 Fermi shader unit. So based on the specs alone it is easy to extrapolate that the GK104 will be close to GTX 580 in performance, but it definitely will not exceed Tahiti.

Now since you're insisting a mid range part, there are 2 possibilities here. 1) Nvidia releases GK104 which comes close to GTX 580 at a lower price point, and releases a GK110 based GTX 680 in Q3 (remember, GK110 JUST taped out) or 2) They will release a GK104 based GTX 680.
I think they will do the latter.

Just so you know , GK100 was scrapped and GK110 just taped out 2 weeks ago. GK100 will not see light of day before Q3. Lastly, these specs are not impressive. If you're somehow thinking this will be a tahiti killer, you're in for a grand disappointment.
post #44 of 53
Quote:
Originally Posted by xoleras View Post

Wishful thinking, unfortunately GK104 is the only part being released in the next 6 months aside from the GK104 parts with disabled CU's. So it is very likely that the GTX 680 will be based on a GK104 part. Furthermore, as much as i'd like to point out how you were championing the lenzfire specs a few weeks ago (lol), Kepler does not have hotclocking so it takes 3-4 Kepler shader units to equal 1 Fermi shader unit. So based on the specs alone it is easy to extrapolate that the GK104 will be close to GTX 580 in performance, but it definitely will not exceed Tahiti.
Now since you're insisting a mid range part, there are 2 possibilities here. 1) Nvidia releases GK104 which comes close to GTX 580 at a lower price point, and releases a GK110 based GTX 680 in Q3 (remember, GK110 JUST taped out) or 2) They will release a GK104 based GTX 680.
I think they will do the latter.
Just so you know , GK100 was scrapped and GK110 just taped out 2 weeks ago. GK100 will not see light of day before Q3. Lastly, these specs are not impressive. If you're somehow thinking this will be a tahiti killer, you're in for a grand disappointment.

GK104 pushes twice the amount of pixels per clock and is clocked around 25% higher. The question is how much polygones need to be pushed per clock cycle in order for it to become a bottleneck. Apparently the ROPs in GF100 and GF110 (48) were superfluous for gaming. AMD kept the ROP count the same too Cypress -> Cayman -> Tahiti (32) and it didn't seem too cutt performance.

Also because of hotclocking the CUDA cores worked at 2x the frequency of the other fixed function hardware. So a better estimate would be Kepler CUDA core count / 2 = Fermi CUDA core count. Still the question is what else changed inside the SM and GPCs.
post #45 of 53
Quote:
Originally Posted by TheBlademaster01 View Post

GK104 pushes twice the amount of pixels per clock and is clocked around 25% higher. The question is how much polygones need to be pushed per clock cycle in order for it to become a bottleneck. Apparently the ROPs in GF100 and GF110 (48) were superfluous for gaming. AMD kept the ROP count the same too Cypress -> Cayman -> Tahiti (32) and it didn't seem too cutt performance.
Also because of hotclocking the CUDA cores worked at 2x the frequency of the other fixed function hardware. So a better estimate would be Kepler CUDA core count / 2 = Fermi CUDA core count. Still the question is what else changed inside the SM and GPCs.
The thing is you need more bandwidth to satisfy those ROPs.
http://www.anandtech.com/show/5261/amd-radeon-hd-7970-review/26

The 7970 pushes 50% more pixels with 50% more bandwidth and 5% higher theoretical ROP-performance compared to the 6970.

The GF110 most likely has 48 ROPs because 24 is too few and a 512 bit GDDR5 interface was too complex to feasibly design. Look at GTX 285 vs 580:
32% more pixels with a theoretical maximum of 79% more.
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post #46 of 53
Quote:
Originally Posted by Arni90 View Post

The thing is you need more bandwidth to satisfy those ROPs.
http://www.anandtech.com/show/5261/amd-radeon-hd-7970-review/26
The 7970 pushes 50% more pixels with 50% more bandwidth and 5% higher theoretical ROP-performance compared to the 6970.
The GF110 most likely has 48 ROPs because 24 is too few and a 512 bit GDDR5 interface was too complex to feasibly design. Look at GTX 285 vs 580:
32% more pixels with a theoretical maximum of 79% more.

That's another way to view this, I was actually pointing out that geometry is not really a bottleneck in most games (aside from Crysis 2 and games with tons of AA that is).
post #47 of 53
Ever wonder why an ATI Enthusiast even cares? Make your point and move on. Whether it beats or dosent beat perfomance, does it really matter so much one has to debate a news release to the point of ridiculous?

AMD has a great successful series's, Why be jelly if Nvidia surpasses it or not? Either way being this late into the ring Nvidia lost the round by default regardless. It's not impossible with those specs if a redesigned architecture can manage graphics better. It's not a refresh of Fermi it's Kepler.
     
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post #48 of 53
I have a feeling this card will be great up to 1080p after that it will fall on its face where the 7970 and 7950 will just keep going. Thats also expected of a mid-range GPU.
post #49 of 53
Quote:
Originally Posted by Arni90 View Post

I'm still wondering how Nvidia's supposed to beat the GTX 580 a part with less bandwidth and (to a certain extent) lesser ROP-performance.
Even the 7970 craves bandwidth, going from 1250 to 1750 MHz on the memory gives about 15% more performance in games like Metro 2033 and Crysis where you'd assume the GPU to be mostly shader-bound. Considering the 7970 has more functional units than these alleged GK104 specifications and higher theoretical performance I have a hard time believing the GK104 will surpass even GTX 580, much less a 7970, without a lot more bandwidth.

3870 was faster than 2900xt, even though the 2900xt had way more bandwidth. A lot can be done by simply improving efficiency.
Edited by qwertymac93 - 2/11/12 at 8:46am
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post #50 of 53
Quote:
Originally Posted by qwertymac93 View Post

3870 was faster than 2900xt, even though the 2900xt had way more bandwidth. A lot can be done by simply improving efficiency.

To be fair they were about the exact same clock for clock. Plus 3870 used GDDR4 so it helped a lot even with the smaller memory interface.
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