"Once more into the fray.
Into the last good fight I'll ever know."
-The Grey

At a pace just shy of a card a month, NVIDIA has been launching the GeForce 600 series part by part for over the last half year now. What started with the GeForce GTX 680 in March and most recently saw the launch of the GeForce GTX 660 will finally be coming to an end today with the 8th and what is likely the final retail GeForce 600 series card, the GeForce GTX 650 Ti.

Last month we saw the introduction of NVIDIA’s 3rd Kepler GPU, GK106, which takes its place between the high-end GK104 and NVIDIA’s low-end/mobile gem, GK107. At the time NVIDIA launched just a single GK106 card, the GTX 660, but of course NVIDIA never launches just one product based on a GPU – if nothing else the economics of semiconductor manufacturing dictate a need for binning, and by extension products to attach to those bins. So it should come as no great surprise that NVIDIA has one more desktop GK106 card, and that card is the GeForce GTX 650 Ti.

The GTX 650 Ti is the aptly named successor to 2011’s GeForce GTX 550 Ti, and will occupy the same $150 price point that the GTX 550 Ti launched into. It will sit between the GTX 660 and the recently launched GTX 650, and despite the much closer similarities to the GTX 660 NVIDIA is placing the card into their GTX 650 family and pitching it as a higher performance alternative to the GTX 650. With that in mind, what exactly does NVIDIA’s final desktop consumer launch of 2012 bring to the table? Let’s find out.

  GTX 660 GTX 650 Ti GTX 650 GT 550 Ti
Stream Processors 960 768 384 192
Texture Units 80 64 32 32
ROPs 24 16 16 16
Core Clock 980MHz 925MHz 1058MHz 900MHz
Boost Clock 1033MHz N/A N/A N/A
Memory Clock 6.008GHz GDDR5 5.4GHz GDDR5 5GHz GDDR5 4.1GHz GDDR5
Memory Bus Width 192-bit 128-bit 128-bit 192-bit
VRAM 2GB 1GB/2GB 1GB 1GB
FP64 1/24 FP32 1/24 FP32 1/24 FP32 1/12 FP32
TDP 140W 110W 64W 116W
GPU GK106 GK106 GK107 GF116
Transistor Count 2.54B 2.54B 1.3B 1.17B
Manufacturing Process TSMC 28nm TSMC 28nm TSMC 28nm TSMC 40nm
Launch Price $229 $149 $109 $149

Coming from the GTX 660 and its fully enabled GK106 GPU, NVIDIA has cut several features and functional units in order to bring the GTX 650 Ti down to their desired TDP and price. As is customary for lower tier parts, GTX 650 Ti ships with a binned GK106 GPU with some functional units disabled, where it unfortunately takes a big hit. For the GTX 650 Ti NVIDIA has opted to disable both SMXes and ROP/L2/memory clusters, with a greater emphasis on the latter.

On the shader side of the equation NVIDIA is disabling just a single SMX, giving GTX 650 Ti 768 CUDA cores and 64 texture units. On the ROP/L2/memory side of things however NVIDIA is disabling one of GK106’s three clusters (the minimum granularity for such a change), so coming from the GTX 660 the GTX 650 Ti will have much less memory bandwith and ROP throughput than its older sibling.

Taking a look at clockspeeds, along with the reduction in functional units there has also been a reduction in clockspeeds across the board. The GTX 650 Ti will ship at 925MHz, 65MHz lower than the GTX 660 Ti. Furthermore NVIDIA has decided to limit GPU boost functionality to the GTX 660 and higher families, so the GTX 650 Ti will actually run at 925MHz and no higher. The lack of a boost clock means the effective difference is closer to 100MHz. On the other hand the lack of min-maxing here by NVIDIA will have some good ramifications for overclocking, as we’ll see. Meanwhile the memory clock will be at 5.4GHz, which at only 600MHz below NVIDIA’s standards-bearer Kepler memory clock of 6GHz is not nearly as big as the loss of memory bandwidth from the memory bus width reduction.

Overall this gives the GTX 650 Ti approximately 72% of the shading/texturing performance, 60% of the ROP throughput, and 60% of the memory bandwidth of the GTX 660. Meanwhile compared to the GTX 650 the GTX 650 Ti has 175% of shading/texturing performance, 108% of the memory bandwidth, and 87% of the ROP throughput of its smaller predecessor. For what little tradition there is, NVIDIA’s x50 parts are traditionally geared towards 1680x1050/1600x900 resolutions. And while NVIDIA is trying to stretch that definition due to the popularity of 1920x1080 monitors, the loss of the ROP/memory cluster all but closes the door on the GTX 650 Ti’s 1080p ambitions. The GTX 650 Ti will be for all intents and purposes NVIDIA’s fastest sub-1080p Kepler card.

Moving on, it was interesting to find out that NVIDIA is not going to be disabling SMXes for the GTX 650 Ti in a straightforward manner. Because of GK106’s asymmetrical design and the pigeonhole principle – 5 SMXes spread over 3 GPCs – NVIDIA is going to be shipping GTX 650 Ti certified GPUs with both 2 GPCs and 3 GPCs, depending on which GPC houses the defective SMX that NVIDIA will be disabling. To the best of our knowledge this is the first time NVIDIA has done something like this, particularly since Fermi cards had far more SMs per GPC. Despite the fact that 3 GPC versions of the GTX 650 Ti should technically have a performance advantage due to the extra Raster Engine, NVIDIA tells us that the performance is virtually identical to the 2 GPC version. Ultimately since GTX 650 Ti is going to be ROP bottlenecked anyhow – and hence lacking the ROP throughput to take advantage of that 3rd Raster Engine – the difference should be just as insignificant as NVIDIA claims.

Meanwhile when it comes to power consumption the GTX 650 Ti is being given a TDP of 110W, some 30W lower than the GTX 660. Even compared to the GTX 550 Ti this is still a hair lower (116W vs. 110W), while the gap between the GTX 650 Ti and GTX 650 will be 34W. Idle power consumption on the other hand will be virtually unchanged, with the GTX 650 Ti maintaining the GTX 660’s 5W standard.

As NVIDIA’s final consumer desktop GeForce 600 card for the year, NVIDIA is setting the MSRP of the 1GB card at $150, between the $109 GTX 650 and the $229 GTX 660. This is another virtual launch, with partners going ahead with their own designs from the start. NVIDIA’s reference design will not be directly sold, but most of the retail boards will be very similar to NVIDIA’s reference card anyhow, implementing a single-fan open air cooler like NVIDIA’s. PCBs should also be similar; 2 of the 3 retail cards we’re looking at use the reference PCB, which on a side note is identical to the GTX 650 reference PCB as GTX 650 Ti and GTX 650 are pin compatible. Meanwhile similar to the GTX 660 Ti launch, partners will be going ahead with a mix of memory capacities, with many partners offering both 1GB and 2GB cards.

At launch the GTX 650 Ti will be facing competition from both last-generation GeForce cards and current-generation Radeon cards. The GeForce GTX 560 is currently going for almost exactly $150, making it direct competition for the GTX 650 Ti. The 560 cannot match the GTX 650 Ti’s power consumption, but thanks to its ROP performance and memory bandwidth it’s a potent competitor for rendering performance.

Meanwhile the Radeon competition will be the tag-team of the 7770 and the 7850. The 7770 is not nearly as powerful as the GTX 650 Ti, but with prices at-or-below $119 it significantly undercuts the GTX 650 Ti. Meanwhile the Pitcairn based 7850 1GB  can more than give the GTX 650 Ti a run for its money, but is priced on average $20 higher at $169, and as the 1GB version is a bit of a niche product for AMD the selection the card selection won’t be as great.

To sweeten the deal NVIDIA has a new game bundle promotion starting up for the GTX 650 Ti. Retailers will be bundling vouchers for Assassin’s Creed III with GTX 650 Ti cards in North America and in Europe. Unreleased games tend to be good deals value-wise, but in the case of Assassin’s Creed III this also means waiting nearly 2 months for the PC version of the game to ship.

Fall 2012 GPU Pricing Comparison
AMD Price NVIDIA
Radeon HD 7950 $329  
  $299 GeForce GTX 660 Ti
Radeon HD 7870 $239/$229 GeForce GTX 660
Radeon HD 7850 2GB $189  
Radeon HD 7850 1GB $169 GeForce GTX 650 Ti 2GB
  $149 GeForce GTX 650 Ti 1GB
Radeon HD 7770 $109 GeForce GTX 650
Radeon HD 7750 $99 GeForce GT 640
Meet The GeForce GTX 650 Ti
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  • chizow - Tuesday, October 09, 2012 - link

    I guess in years past this may and probably should've been branded GTS 650Ti along with the GTS 650 (they've used GTS 250, GTS 450 etc in the past), but I know for a fact Nvidia is trying to establish GTX as its own brand for gamers.

    They really emphasize it with all this "Green Light" business with regard to overclocking, overvolting etc.
    Reply
  • Blazorthon - Tuesday, October 09, 2012 - link

    Nvidia has been cracking down on overvolting support, so IDK if I'd give them that much credit. Reply
  • Pneumothorax - Tuesday, October 09, 2012 - link

    That will make the price/performance gap even worse as the 7850 is an oc beast. Reply
  • goinginstyle - Tuesday, October 09, 2012 - link

    So why no reviews of the Asus or MSI offerings in these roundups? Reply
  • silverblue - Tuesday, October 09, 2012 - link

    You need to be sent a card in order to review it. ;) Reply
  • Shadowmaster625 - Tuesday, October 09, 2012 - link

    The 7850 1GB is $150. It IS is the direct competitor to the 650 ti. You can speculate all you want about the 1GB being some sort of ephemeral limiting factor, but I dont see it. All I see is that in one game, at BEYOND 1080p resolution, memory becomes a factor. But if you look at it, you can see that it is still so very close on the bell curve. I bet that if you actually tested Skyrim at 1920x1080 (not 1920x1200), there would be much less difference between 2GB and 1GB.

    Even 2 years from now the 7850 1GB is going to be a better performer than the 650ti. Even with the "latest and greatest" games.
    Reply
  • Shark321 - Tuesday, October 09, 2012 - link

    Where is the 7850 1GB $150? Reply
  • KineticHummus - Tuesday, October 09, 2012 - link

    yeah wish i could fine one of those haha. pretty sure there isnt a single card for 150 Reply
  • Marlin1975 - Tuesday, October 09, 2012 - link

    How about $159 AR shipped?

    http://www.newegg.com/Product/Product.aspx?Item=N8...
    Reply
  • LordanSS - Tuesday, October 09, 2012 - link

    I'm a bit curious about this card's performance with PhysX enabled games.

    Personally, I am a 6970 owner and thus have no access to PhysX effects on games, but there are many workarounds out there where you can add a nVidia card to your machine to compute the physics.

    Borderlands 2 is an example, I know of people buying (cheap) nVidia cards so they can run physics on them. Problem is that, most of the time, these guys are buying really old or cheap hardware (like GT210 or 430 cards), causing a big drop in game performance. Others using more powerful (and expensive) cards, on the other hand, experience good results.

    So I'm thinking what's the cutting point for performance here. I know it's an extremely niche endeavor, but if anyone has experience or thoughts, I'd be glad to hear them.
    Reply

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