The launch of the Kepler family of GPUs in March of 2012 was something of a departure from the normal for NVIDIA. Over the years NVIDIA has come to be known among other things for their big and powerful GPUs. NVIDIA had always produced a large 500mm2+ GPU to serve both as a flagship GPU for their consumer lines and the fundamental GPU for their Quadro and Tesla lines, and have always launched with that big GPU first.

So when the Kepler family launched first with the GK104 and GK107 GPUs – powering the GeForce GTX 680 and GeForce GT 640M respectively – it was unusual to say the least. In place of “Big Kepler”, we got a lean GPU that was built around graphics first and foremost, focusing on efficiency and in the process forgoing a lot of the compute performance NVIDIA had come to be known for in the past generation. The end result of this efficiency paid off nicely for NVIDIA, with GTX 680 handily surpassing AMD’s Radeon HD 7970 at the time of its launch in both raw performance and in power efficiency.

Big Kepler was not forgotten however. First introduced at GTC 2012, GK110 as it would come to be known would be NVIDIA’s traditional big, powerful GPU for the Kepler family. Building upon NVIDIA’s work with GK104 while at the same time following in the footsteps of NVIDIA’s compute-heavy GF100 GPU, GK110 would be NVIDIA’s magnum opus for the Kepler family.

Taped out later than the rest of the Kepler family, GK110 has taken a slightly different route to get to market. Rather than launching in a consumer product first, GK110 was first launched as the heart of NVIDIA’s Tesla K20 family of GPUs, the new cornerstone of NVIDIA’s rapidly growing GPU compute business.


Oak Ridge National Laboratory's Titan Supercomputer

Or perhaps as it’s better known, the GPU at the heart of the world’s fastest supercomputer, Oak Ridge National Laboratory’s Titan supercomputer.

The Titan supercomputer was a major win for NVIDIA, and likely the breakthrough they’ve been looking for. A fledging business merely two generations prior, NVIDIA and their Tesla family have quickly shot up in prestige and size, much to the delight of NVIDIA. Their GPU computing business is still relatively small – consumer GPUs dwarf it and will continue to do so for the foreseeable future – but it’s now a proven business for NVIDIA. More to the point however, winning contracts like Titan are a major source of press and goodwill for the company, and goodwill the company intends to capitalize on.

With the launch of the Titan supercomputer and the Tesla K20 family now behind them, NVIDIA is now ready to focus their attention back on the consumer market. Ready to bring their big and powerful GK110 GPU to the consumer market, in typical NVIDIA fashion they intend to make a spectacle of it. In NVIDIA’s mind there’s only one name suitable for the first consumer card born of the same GPU as their greatest computing project: GeForce GTX Titan.

GeForce GTX Titan: By The Numbers

At the time of the GK110 launch at GTC, we didn’t know if and when GK110 would ever make it down to consumer hands. From a practical perspective GTX 680 was still clearly in the lead over AMD’s Radeon HD 7970. Meanwhile the Titan supercomputer was a major contract for NVIDIA, and something they needed to prioritize. 18,688 551mm2 GPUs for a single customer is a very large order, and at the same time orders for Tesla K20 cards were continuing to pour in each and every day after GTC. In the end, yes, GK110 would come to the consumer market. But not until months later, after NVIDIA had the chance to start filling Tesla orders. And today is that day.

Much like the launch of the GTX 690 before it, NVIDIA intends to stretch this launch out a bit to maximize the amount of press they get. Today we can tell you all about Titan – its specs, its construction, and its features – but not about its measured performance. For that you will have to come back on Thursday, when we can give you our benchmarks and performance analysis.

  GTX Titan GTX 690 GTX 680 GTX 580
Stream Processors 2688 2 x 1536 1536 512
Texture Units 224 2 x 128 128 64
ROPs 48 2 x 32 32 48
Core Clock 837MHz 915MHz 1006MHz 772MHz
Shader Clock N/A N/A N/A 1544MHz
Boost Clock 876Mhz 1019MHz 1058MHz N/A
Memory Clock 6.008GHz GDDR5 6.008GHz GDDR5 6.008GHz GDDR5 4.008GHz GDDR5
Memory Bus Width 384-bit 2 x 256-bit 256-bit 384-bit
VRAM 6 2 x 2GB 2GB 1.5GB
FP64 1/3 FP32 1/24 FP32 1/24 FP32 1/8 FP32
TDP 250W 300W 195W 244W
Transistor Count 7.1B 2 x 3.5B 3.5B 3B
Manufacturing Process TSMC 28nm TSMC 28nm TSMC 28nm TSMC 40nm
Launch Price $999 $999 $499 $499

Diving right into things then, at the heart of the GeForce GTX Titan we have the GK110 GPU. By virtue of this being the 2nd product to be launched based off the GK110 GPU, there are no great mysteries here about GK110’s capabilities. We’ve covered GK110 in depth from a compute perspective, so many of these numbers should be familiar with our long-time readers.

GK110 is composed of 15 of NVIDIA’s SMXes, each of which in turn is composed of a number of functional units. Every GK110 packs 192 FP32 CUDA cores, 64 FP64 CUDA cores, 64KB of L1 cache, 65K 32bit registers, and 16 texture units. These SMXes are in turn paired with GK110’s 6 ROP partitions, each one composed of 8 ROPs, 256KB of L2 cache, and connected to a 64bit memory controller. Altogether GK110 is a massive chip, coming in at 7.1 billion transistors, occupying 551mm2 on TSMC’s 28nm process.

For Titan NVIDIA will be using a partially disabled GK110 GPU. Titan will have all 6 ROP partitions and the full 384bit memory bus enabled, but only 14 of the 15 SMXes will be enabled. In terms of functional units this gives Titan a final count of 2688 FP 32 CUDA cores, 896 FP64 CUDA cores, 224 texture units, and 48 ROPs. This makes Titan virtually identical to NVIDIA’s most powerful Tesla, K20X, which ships with the same configuration. NVIDIA does not currently ship any products with all 15 SMXes enabled, and though NVIDIA will never really explain why this is – yield, power, or otherwise – if nothing else it leaves them an obvious outlet for growth if they need to further improve Titan’s performance, by enabling that 15th SMX.

Of course functional units are only half the story, so let’s talk about clockspeeds. As a rule of thumb bigger GPUs don’t clock as high as smaller GPUs, and Titan will be adhering to this rule. Whereas GTX 680 shipped with a base clock of 1006MHz, Titan ships at a more modest 837MHz, making up for any clockspeed disadvantage with the brute force behind having so many functional units. Like GTX 680 (and unlike Tesla), boost clocks are once more present, with Titan’s official boost clock coming in at 876MHz, while the maximum boost clock can potentially be much higher.

On the memory side of things, Titan ships with a full 6GB of GDDR5. As a luxury card NVIDIA went for broke here and simply equipped the card with as much RAM as is technically possible, rather than stopping at 3GB. You wouldn’t know that from looking at their memory clocks though; even with 24 GDDR5 memory chips, NVIDIA is shipping Titan at the same 6GHz effective memory clock as the rest of the high-end GeForce 600 series cards, giving the card 288GB/sec of memory bandwidth.

To put all of this in perspective, on paper (and at base clocks), GTX 680 can offer just shy of 3.1 TFLOPS of FP32 performance, 128GTexels/second texturing throughput, and 32GPixels/second rendering throughput, driven by 192GB/sec of memory bandwidth. Titan on the other hand can offer 4.5 TFLOPS of FP32 performance, 187GTexels/second texturing throughput, 40GPixels/second rendering throughput, and is driven by a 288GB/sec memory bus. This gives Titan 46% more shading/compute and texturing performance, 25% more pixel throughput, and a full 50% more memory bandwidth than GTX 680. Simply put, thanks to GK110 Titan is a far more powerful GPU than what GK104 could accomplish.

Of course with great power comes great power bills, to which Titan is no exception. In GTX 680’s drive for efficiency NVIDIA got GTX 680 down to a TDP of 195W with a power target of 170W, a remarkable position given both the competition and NVIDIA’s prior generation products. Titan on the other hand will have a flat 250W power target – in line with prior generation big NVIDIA GPUs – staking out its own spot on the price/power hierarchy, some 28%-47% higher in power consumption than GTX 680. These values are almost identical to the upper and lower theoretical performance gaps between Titan and GTX 680, so performance is growing in-line with power consumption, but only just. From a practical perspective Titan achieves a similar level of efficiency as GTX 680, but as a full compute chip it’s unquestionably not as lean. There’s a lot of compute baggage present that GK104 didn’t have to deal with.

Who’s Titan For, Anyhow?
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  • CeriseCogburn - Monday, March 04, 2013 - link

    lol - DREAM ON about goodwill and maintaining it.

    nVidia is attacked just like Intel, only worse. They have the least amount of "goodwill" any company could possibly have, as characterized by the dunderheads all over the boards and the also whining reviewers who cannot stand the "arrogant know it all confident winners who make so much more money playig games as an nVidia rep"...

    Your theory is total crap.

    What completely overrides it is the simple IT JUST WORKS nVidia tech and end user experience.
    Add in the multiplied and many extra features and benefits, and that equals the money in the bank that lets the end user rest easy that new games won't become an abandoned black holed screen.

    Reputation ? The REAL reputation is what counts, not some smarmy internet crybaby loser with lower self esteem than a confident winner with SOLID products, the BEST of the industry.
    That's arrogance, that's a winner, that's a know it all, that's Mr. Confidence, that's the ca$h and carry ladies magnet, and that's what someone for the crybaby underdog loser crash crapster company cannot stand.
    Reply
  • Galvin - Tuesday, February 19, 2013 - link

    Can this card do 10bit video or still limited to 8bit? Reply
  • alpha754293 - Tuesday, February 19, 2013 - link

    Does this mean that Tesla-enabled applications will be able to make use of Titan? Reply
  • Ryan Smith - Tuesday, February 19, 2013 - link

    It depends on what features you're trying to use. From a fundamental standpoint even the lowly GT 640 supports the baseline Kepler family features, including FP64. Reply
  • Ankarah - Tuesday, February 19, 2013 - link

    Highly unusual for a company to have two of their products at the exact same price point, catering to pretty much the same target audience.

    I guess it could be viewed as a poor-man's-Tesla but as far as the gaming side goes, it's quite pointless next to the 690, not to mention very confusing to anyone other than those are completely up-to-date on the latest news stories.
    Reply
  • CeriseCogburn - Monday, March 04, 2013 - link

    Let's see, single GPU core fastest in the gaming world, much lower wattage, no need for profiles, constant FPS improvement - never the same or no scaling issues across all games, and you find it strange ?

    I find your complete lack of understanding inexcusable since you opened the piehole and removed all doubt.
    Reply
  • Voidman - Tuesday, February 19, 2013 - link

    Finally somehting I could be excited about. I have a hard time caring much about the latest smart phone or tablet. A new high end video card though is something different all together. And then it turns out to be a "luxury product" and priced at 1k. Cancel excitement. Oh well, I'm happy with my 680 still, and I'm pretty sure I've still got overclocking room on it to boot. But for all those that love to hate on either AMD or Nvidia, this is what happens when one is not pushing the other. I have no doubt what so ever that AMD would do the same if they were on top at the moment.

    Reply
  • HanakoIkezawa - Tuesday, February 19, 2013 - link

    The price is a bit disappointing but not unexpected. I was hoping this would be 750-850 not so I could buy one but so that I could get a second 670 for a bit cheaper :D

    But in all seriousness, this coming out does not make the 680 or 670 any slower or less impressive. In the same way the 3970x's price tag doesn't make the 3930k any less of a compelling option.
    Reply
  • johnsmith9875 - Tuesday, February 19, 2013 - link

    Why not just make the video card the computer and let the intel chip handle graphics??? Reply
  • Breit - Tuesday, February 19, 2013 - link

    Thanks Ryan, this made my day! :)

    Looking forward to part 2...
    Reply

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