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Nvidia GeForce GTX 780 Ti specifications revealed?

by Tarinder Sandhu on 22 October 2013, 09:30

Tags: NVIDIA (NASDAQ:NVDA)

Quick Link: HEXUS.net/qab4af

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Nvidia Boss Jen-Hsun Huang stepped on stage last week brandishing the GeForce GTX 780 Ti graphics card. Described in his own words as 'best GPU that's ever been built,' we took it as an obvious slight towards the upcoming AMD Radeon R9 290X.

No specifications have thus far been proffered by the green team, but the folks over at Chiphell Forums appear to have a GPU-Z shot of the unreleased GPU, shown to the right.

Now, it is sensible to take anything posted on forums with a large pinch of salt, though Chiphell has been one of the better rumour-reporting sites with respect to eventual accuracy.

If true, the specifications suggest that in terms of architecture the GTX 780 Ti is a halfway house between Titan and incumbent GTX 780: this chip has 2,496 processing cores split over 13 SMX units (192 per SMX) - Titan uses 14 SMX and regular GTX 780 12. The remainder is pretty standard and identical to GTX 780, albeit with higher default frequencies than either existing top-end GPU.

Let's take this a step further and dial the supposed GTX 780 Ti into our Table of Doom™.



GeForce GTX Titan
(6,144MB)
GeForce GTX 780
(3,072MB)
GeForce GTX 780 Ti
(3,072MB)
Palit GTX 780 Super JetStream
(3,072MB)
Launch Date
February 2013
May 2013
November 2013
May 2013
DX API
11.1
11.1
11.1
11.1
Process
28nm
28nm
28nm
28nm
Transistors
7.1bn
7.1bn
7.1bn
7.1bn
Approx Die Size
551mm²
551mm²
551mm²
551mm²
Processors
2,688
2,304
2,496
2,304
GPU Boost
v2.0
v2.0
v2.0
v2.0
Texture Units
224
192
208
192
ROP Units
48
48
48
48
GPU Clock/Boost (MHz)
836 (876)
863 (902)
902 (954)
1,112
Shader Clock/Boost (MHz)
836 (876)
863 (902)
902 (954)
1,112
GFLOPS
4,494/4709
3,977/4156
4,503/4762
5,124
Memory Clock (MHz)
6,008
6,008
6,008
6,200
Memory Bus (Bits)
384
384
384
384
Max bandwidth (GB/s)
288.4
288.4
288.4
297.6
Power Connectors
8+6
8+6
8+6
8+8
TDP (Watts)
250
250
250?
250
GFLOPS Per Watt
17.98
15.85
18.0
20.5
MSRP
$999
$649
$649?
$649

A company can use various metrics to define the power of a GPU. Perhaps the most common is to calculate the potential GFLOPS throughput, and here is where it becomes interesting. The supposed combination of core speed and shaders would make the GTX 780 Ti a hair faster than the Titan in both stock and GPU Boost modes. Memory speed appears to be identical amongst the three premier cards.

But just for kicks, we've also included the peak numbers for a reviewed Palit GTX 780 Super JetStream - a card that runs at a minimum, but not guaranteed, GPU Boost speed of 1,112MHz in all of our games. This card's GFLOPS and memory throughput is comfortably higher than any reference-like Nvidia GPU. But of course, there's no reason why Palit, or any other partner, cannot indulge in overclocking the as-yet-theoretical GTX 780 Ti.

GTX 780 Ti will have to be a touch faster than Titan in specifications for Nvidia's CEO bombast announcement to carry validity, but, given a choice, the Titan is the better card due to its larger framebuffer. Question is, will the GTX 780 Ti be fast enough to counter the R9 290X threat? We'll find out soon enough.



HEXUS Forums :: 11 Comments

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3GB frame buffer might explain why the red side are happy for 4k leaks to appear...
It's all about the pricing now...
Very true kalniel, I wonder what this could mean for 2560x1440 and below. Maybe the R9 290X will come in at lower than expected performance levels but at a lower price point to boot. This might actually be preferable.
That's certainly a lot higher than I thought it would be. Is it possible to compare this with the leaked R290X stats?
So, slower than a factory overclocked 780, potentially the same performance as a Titan, wonder how they'll price it? Presumably the concept here is nvidia produce a very average stock card then rely on partners to clock it through the roof to get the performance they'll actually need to compete.

Given it's positioned (namingwise, at least) between the 780 and the Titan, one can assume it'll cost somewhere between the 780 and the Titan; right in the alleged price-range of the 290X. Stock versions probably aren't going to wow anyone - wonder if the stock version will ever actually get released ... I wouldn't be at all surprised to find that nvidia don't sample any stock cards to the press, and initial reviews will all be done on partner supplied overclocked version.