[3dcenter] GK104 specs

[Crap Daddy]

According to http://www.3dcenter.org these are the specs for GK104:

4 Graphics Processing Clusters (GPC)
4 Streaming Multiprocessors (SM) per GPC = 16 SM
96 Stream Processors (SP) per SM = 1536 CUDA cores

TMU / Geometry Domain
8 Texture Units (TMU) per SM = 128 TMUs
32 Raster OPeration Units (ROPs)

Memory
256-bit wide GDDR5 memory interface
2048 MB (2 GB) memory amount standard

Clocks/Other
950 MHz core/CUDA core (no hot-clocks)
1250 MHz actual (5.00 GHz effective) memory, 160 GB/s memory bandwidth
2.9 TFLOP/s single-precision floating point compute power
486 GFLOP/s double-precision floating point compute power
Estimated die-area 340mm²

 

[Skurge]

1536 Cuda cores? Like the 6970? That's very strange that they are moving away from their "fat" cores to smaller ones like AMD.

 

[bunnyfubbles]

1536 Cuda cores? Like the 6970? That's very strange that they are moving away from their "fat" cores to smaller ones like AMD.

actually its not so strange considering we heard long ago that they were getting rid of hot clocks

 

[Arkadrel]

actually its not so strange considering we heard long ago that they were getting rid of hot clocks

I can understand the logic behinde it.
Half clocks speeds => need twice as many for same performance.

However the 580 has like 512 cuda cores right? double up would be like 1024... not 1536 of them.
Also the 580 shaders are only run at like ~1550 mhz .... 950 is more like 2/3 rds not half speed.

Im kinda skeptical of those specs.... guess we ll find out when it launches.

 

[blackened23]

Now these specs make MUCH more sense than the nonsense at lenzfire and "fits" with everything we heard last year about different shader units. It won't beat a 7970 if these specs are true.

 

[Crap Daddy]

Based on all the rumors and these fresh specs I'd say it will fit between 7950 and 7970 and if the price is right (around 300$) it will be a winner. Remember, this is mid-range for NV. In the same article if I read right it's speculated April for this and one month later for the big boy, GK110.

 

[Olikan]

Should be a great card for 299$ (if that is true) but It won't beat a 7970 I don't believe.

the die area is very big by the specs... if nvidia put all the extra area in cache, it might have a chance

 

[LOL_Wut_Axel]

Based on all the rumors and these fresh specs I'd say it will fit between 7950 and 7970 and if the price is right (around 300$) it will be a winner. Remember, this is mid-range for NV. In the same article if I read right it's speculated April for this and one month later for the big boy, GK110.

Performance. Mainstream is GTX/GTS 550.

And GK110 will be here by summer as the very, very earliest. It's more probable that cards with it will be on the market on Q3 or Q4 2012.

 

[Arzachel]

Now these specs make MUCH more sense than the nonsense at lenzfire and "fits" with everything we heard last year about different shader units. Should be a great card for 299$ (if that is true) but It won't beat a 7970 I don't believe.

Not really. The memory bus with and the memory clock kinda make me doubt that this is real.

 

[blackened23]

Based on all the rumors and these fresh specs I'd say it will fit between 7950 and 7970 and if the price is right (around 300$) it will be a winner. Remember, this is mid-range for NV. In the same article if I read right it's speculated April for this and one month later for the big boy, GK110.

One month later won't happen for GK110 if purported leaks are correct - GK110 just taped out a couple of weeks ago. So what I think will happen: Nvidia will make 2 GK104 variants and another part with CUs disabled, and market those as 680, 670, 660. This fits because NV is already working on a "cut down" GK104 part. And they will be priced accordingly (aka, high)

GK110 will be used as a refresh. If GK110 just taped out it will not be here until August at the earlier, more likely October. The die also isn't "very very big" whoever said that. Maybe the refresh will be the 700 series? I don't see NV marketing this as a mid range part when GK110 won't show face for another 6 months after the fact. They will squeeze the GK104 dry and then use the GK110 for the later refresh this year? Just speculation on my part

 

[notty22]

They're Coming.....
GK104 pops up in the wild :SA

 

[Keysplayr]

Picture a GTX 560Ti with 768 Cuda cores instead of 384.
If these specs are accurate this should have better performance
than GTX560Ti SLI. Does GTX560Ti SLI perform higher
than a 7970?

 

[LOL_Wut_Axel]

Picture a GTX 560Ti with 768 Cuda cores instead of 384.
If these specs are accurate this should have better performance
than GTX560Ti SLI. Does GTX560Ti SLI perform higher
than a 7970?

Except if they made each core weaker to get more of them, of course.

GTX 560 SLI is roughly 15% faster than GTX 580, so it would be just shy of matching strides with the HD 7970.

Not that it matters, because saying it'll perform the same as GTX 560 Ti SLI is a baseless assumption without knowing other details about the core configuration and, indeed, the performance of each of those cores.

 

[boxleitnerb]

An informed source wrote that GK110 taped out last year. It may have been the last week of 2011 or the week before that, nothing specific is known. I wouldn't so eagerly assume that BigK only comes in October or even later.

 

[Keysplayr]

They're Coming.....
GK104 pops up in the wild :SA

 

[Arkadrel]

If things go as normal, it takes 4-6 weeks from AIB sampling to cards on the shelves. This would mean late March or early April, just like we have been saying for weeks. S|A

So in shops around the world about march-april.
That means maybe a soft launch review earlier Id guess, maybe even one this month?

Looking forwards to it.

 

[blackened23]

An informed source wrote that GK110 taped out last year. It may have been the last week of 2011 or the week before that, nothing specific is known. I wouldn't so eagerly assume that BigK only comes in October or even later.

I know of this leak you speak of (i've seen it myself) and it was for a lesser K part -- or more likely a fermi shrink.

http://news.softpedia.com/news/Nvidia-Tapes-Out-Its-First-28nm-Kepler-GPUs-Report-222800.shtml

Nobody is sure of those code names, but that appears to be a Fermi die shrink. That happened last year, GK110 just taped out per SA.

 

[sontin]

Picture a GTX 560Ti with 768 Cuda cores instead of 384.
If these specs are accurate this should have better performance
than GTX560Ti SLI. Does GTX560Ti SLI perform higher
than a 7970?

SLI gives average 80% more performance A 7970 is 70% faster than the gtx560ti. So yeah this GK104 would be as fast as the 7970.

 

[boxleitnerb]

No, an informed source did not write that GK110 taped out last year. I know of this leak you speak of (i've seen it myself) and it was for a lesser K part -- or more likely a fermi shrink.

http://news.softpedia.com/news/Nvidia-Tapes-Out-Its-First-28nm-Kepler-GPUs-Report-222800.shtml

Nobody is sure of those code names, but that appears to be a Fermi die shrink. That happened last year, GK110 just taped out per SA.

I am not speaking of this source. Be a little more critical and don't believe everything what Charlie writes. He most likely was wrong about there being a GK100 for instance, because that makes absolutely no sense. He probably is also wrong about the "PhysX makes GK104 fast" stuff and I strongly assume that Charlie got some of his info from the aforementioned source. I won't say more.

 

[Keysplayr]

Except if they made each core weaker to get more of them, of course.

GTX 560 SLI is roughly 15% faster than GTX 580, so it would be just shy of matching strides with the HD 7970.

Not that it matters, because saying it'll perform the same as GTX 560 Ti is a baseless assumption without knowing other details about the core configuration and, indeed, the performance of each of those cores.

I almost hate responding to you because our thought processes are
so vastly different, but didnt you account for anything like
if the cores are weaker, there are 1534 of them? Also, that you are assuming 100%
Scaling for SLId GTX560Ti when arriving at your conservative
15% over GTX580? Is it I who is missing some other details?

 

[BallaTheFeared]

Same TMU/ROP count as the 7970? With the same memory bandwidth of a stock 470? Yuck.

This sounds like an AMD card, with an overpowered texture unit and poor pixel shader performance in comparison.

 

[Keysplayr]

SLI gives average 80% more performance A 7970 is 70% faster than the gtx560ti. So yeah this GK104 would be as fast as the 7970.

The devil is in the details. There wouldn't be any SLI scaling
Issues if a GTX560 Ti was a single core 768 core GPU. So, 80%
would be lowballing. Add 20% to your original assessment.
Also consider a GTX560Ti stock clock is 822Mhz. Plus improved arch.

 

[sontin]

The devil is in the details. There wouldn't be any SLI scaling
Issues if a GTX560 Ti was a single core 768 core GPU. So, 80%
would be lowballing. Add 20% to your original assessment

I know. That's the reason why i don't believe these specs. This GK104 should much faster than a GTX580 even with less bandwith.

 

[boxleitnerb]

I know. That's the reason why i don't believe these specs. This GK104 should much faster than a GTX580 even with less bandwith.

Not if efficiency per unit has decreased versus GF114. Also, the lower bandwidth will hurt the card to some degree. Remove 1/3 of Tahiti XT's bandwidth and you get 13% less performance (refer to the Computerbase review). So that would put Tahiti where - GTX580+15%? Not "much faster" I presume.

 

[blackened23]

Keysplayr, you can't do an apples to apples number of cores comparison. Hotclocking is gone, and you need more shader units to maintain the same level of performance as the Fermi.

In any case, it'll be interesting to see how things turn out. Oh yeah, what happened to all those guys vehemently defending lenzfire? :biggrin: Anyway, should be an exiting spring time frame, i'm anxious to see how
these puppies turn out.