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Nvidia GeForce GTX 560 Ti Review: GF114 Rises, GF100 Rides Off

Nvidia GeForce GTX 560 Ti Review: GF114 Rises, GF100 Rides Off
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GF100, your services are no longer required. Nvidia’s GF114 GPU displaces the last card based on the company’s 3 billion-transistor chip using fewer than two billion transistors. It’s amazing what a little optimization can do. Welcome, GeForce GTX 560 Ti.

Back in July of last year, I speculated that Nvidia turned off one Streaming Multiprocessor on the GeForce GTX 460’s GF104 processor to avoid blowing GeForce GTX 465 out of the water. Wouldn’t it have been cool to see a version of that chip with all eight SMs enabled, though? I mean, the GeForce GTX 460 was an award winner with 336 CUDA cores and 56 texture units. And yes, the fully-functioning version might have thrown a wrench into more expensive (and less attractive) GeForce boards. But it also would have wrecked the Radeon HD 6800-series cards a full three months before they launched.

Of course, it made sense that Nvidia wouldn’t do such a thing. The GeForce GTX 465 had enough trouble competing in a world without GF104. That card is no longer being manufactured, though. And we have to imagine that Nvidia is eager to shift away from GF100-based boards entirely.

Up until today, the company had one card left employing its original Fermi-based GPU: GeForce GTX 470. The 470 filled an important gap in Nvidia’s portfolio at $259 (between the $200 GTX 460 and $349 GTX 570). That’s down from a launch price of $350. It’s amazing how healthy competition turns into better value for us game enthusiasts, isn’t it?

GF100 says its final farewell today, just under a year after its original introduction. It’s being replaced by the GeForce GTX 560 Ti. Rather than center on an unrestricted version of GF104, GTX 560 employs a re-spun derivative of the chip that folds in some of the transistor-level improvements first seen in the GeForce GTX 580.

The result is a graphics processor armed with fewer than two billion transistors (1.95 billion, according to Nvidia) that universally matches or exceeds the performance of the three billion-transistor GF100 as it appeared on GeForce GTX 470.

Building A Faster Gaming GPU

We all know that Nvidia’s GeForce GTX 500-series is hardly different from the 400-series, architecturally.

The GeForce GTX 580 and 570 both center on GF110—a reworked GF100 with improved texture filtering, better Z-cull efficiency, and a number of transistor-level optimizations that facilitate higher clocks at comparable power use.

Similarly, GeForce GTX 560 Ti centers on GF114, the re-spun version of GF104. Before you get too excited, though, remember that GF104 already incorporated the texture filtering improvements that didn’t make it into GF100. That is to say 64-bit FP16 texel throughput doubled from two/clock to four/clock, per texture unit. GF104 has this capability, GF110 has it, but GF100 did not. What’s more, Nvidia decided not to carry over the Z-cull improvements from GF110, instead choosing to leave the raster engine unchanged.

The net effect is that GF114 is functionally identical to GF104. In fact, Nvidia even cites the same 1.95 billion transistor count. And we’re still looking at TSMC’s 40 nm process here.

The reworked silicon can clock higher at lower power levels, yielding more performance, but it’s still an improved GF104. Of course, the main difference is that, while Nvidia turned off one of GF104’s Streaming Multiprocessors to create GeForce GTX 460, GeForce GTX 560 Ti sports an unshorn GF114 (I challenge you to use that word in a sentence at some point today). Compared to the 460, that means higher clocks, more CUDA cores, theoretically higher geometry performance due to an eighth PolyMorph engine, and eight additional texture units. All of those factors combine to create a card that doesn’t end up replacing GeForce GTX 460 at all; it instead is fast enough to eclipse the GeForce GTX 470.

Those Specs Look Familiar

If you already know GF104, then this is going to look a bit like a study guide from Last Year’s GPUs 101. GF114 consists of two Graphics Processing Clusters (GPCs), each with four Streaming Multiprocessors. As you already know, all eight SMs are fully enabled in GeForce GTX 560 Ti.

GF100/GF110 SMGF100/GF110 SMGF104/GF114 SMGF104/GF114 SM

Taken (and modified) from my GeForce GTX 460 review:

“Instead of the GF100’s 32 CUDA cores per SM, GF114 wields 48 cores per SM. Keeping these more complex SMs fed with information necessitates higher instruction throughput, so we see another enhancement: taking GF100’s two dispatch units per SM to GF114’s four. Similarly, each SM now boasts eight texture units (instead of four).

In the simplest terms possible, this is a wider GPU than GF100/GF110. The result is better performance than a scaled-down GF100 in the types of apps that most people play today.

GF114, as it appears on GeForce GTX 560 TiGF114, as it appears on GeForce GTX 560 Ti

The chip’s back-end is a bit different, too. A complete GF100 offers six ROP partition units independent of the GPCs, each capable of outputting eight 32-bit integer pixels per clock (totaling 48). All six partitions are also associated with a 64-bit memory path, yielding an aggregate 384-bit bus. GF114 gets a maximum of four partitions, yielding up to 32 pixels per clock and a 256-bit bus.”

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  • 0 Hide
    reprotected , January 25, 2011 12:13 PM
    Some areas could be improved, but this is still pretty decent. Just lower the price 50 dollars please Nvidia and I will buy 10 of them. :) 
  • 8 Hide
    Anonymous , January 25, 2011 12:15 PM
    Wow, it's not as powerful as I expected with that kind of energy use.
  • 2 Hide
    liemfukliang , January 25, 2011 12:27 PM
    Please don't let me go away from Tomshardware because the disapearing of Print View Mode. If there is an official anounce about that please give me the link. In Indonesia internet is so slow and expensive. That way the print mode is so much help. I open an article, klik print view page. I go watching TV, eat, drink cofee, etc. About 10 - 20 minutes later the acticle is completed. I just save as mht for feature need (personal use). Lastly I read it.
    Btw TomGUIDE still have this print page view. Why only in Tomshardware the button is missing?
    Sorry for my OOT.
  • -9 Hide
    geekapproved , January 25, 2011 12:30 PM
    Quote:
    Either way, my conclusion on the GTX 560 Ti doesn't change. It still doesn't present me with the overwhelming urge to upgrade. AMD's cards simply look better in comparison, based on their performance.


    FAIL
  • 1 Hide
    hardcore_gamer , January 25, 2011 12:34 PM
    6950 is really better than a GTX560Ti, and consumes less power.Gigabyte's 1Ghz card is interesting.If it has the performance of a 6950 at $269, AMD'll be forced to reduce the price (again)
  • -1 Hide
    anacandor , January 25, 2011 12:40 PM
    I'd love to see some more benchies on that Gigabyte card like noise and temps, for only $20 more it seems like a steal!
  • 2 Hide
    amazing2 , January 25, 2011 12:44 PM
    liemfukliangPlease don't let me go away from Tomshardware because the disapearing of Print View Mode. If there is an official anounce about that please give me the link. In Indonesia internet is so slow and expensive. That way the print mode is so much help. I open an article, klik print view page. I go watching TV, eat, drink cofee, etc. About 10 - 20 minutes later the acticle is completed. I just save as mht for feature need (personal use). Lastly I read it.Btw TomGUIDE still have this print page view. Why only in Tomshardware the button is missing?Sorry for my OOT.


    Here you go:
    http://www.tomshardware.com/review_print.php?p1=2845

    :) 
  • 1 Hide
    James296 , January 25, 2011 1:12 PM
    I waited to see what this card was going to be like but it feels more like a rebranded GTX 460/470 as far as performance so I'm just going to skip the GTX 560 "Ti" and go for the GTX 570
  • 7 Hide
    cknobman , January 25, 2011 1:20 PM
    GeekApprovedFAIL


    Bigger FAIL
  • -1 Hide
    hixbot , January 25, 2011 1:27 PM
    So can the 6950 1GB be unlocked to a 6970? If not, I'm not sure it has the value the author mentioned, not when compared to the 2GB 6950 which comes with the free upgrade.
  • 4 Hide
    cronik93 , January 25, 2011 1:30 PM
    I think it was a good choice for he AMD to make a 1GB version of the 6950 to compete with the 560.
  • 0 Hide
    leiuno , January 25, 2011 1:57 PM
    what is "unshorn" ?
  • 0 Hide
    wolfram23 , January 25, 2011 1:57 PM
    Can't wait to see what the next gen can do when I may be upgrading... but still, the performance increases over last gen are pretty impressive, and the price/performance ratio is way better now too
  • 1 Hide
    Onus , January 25, 2011 1:57 PM
    I've been waiting for this. Bummer though, I was really hoping for a single PCIE power connection. Oh well. It looks like the most powerful card out there with only one is the HD6850.
  • 1 Hide
    Onus , January 25, 2011 2:01 PM
    leiunowhat is "unshorn" ?

    Unshorn = not sheared, e.g. used to describe sheep before their fleece is harvested. Or, in this case, a graphics card without some of its circuits cut out.
  • 1 Hide
    scrumworks , January 25, 2011 2:13 PM
    That 20 1GB Radeons is only for that single Sapphire model. XFX currently has two 1GB models 20pcs each and I'm sure others follow soon. And that's only at newegg.com.
  • -1 Hide
    Anik8 , January 25, 2011 2:21 PM
    This is chickenshit with everybody blindly slamming the gtx 560.IMO it performed reasonably well and is at par with the 6950.
    Moreover the card has exceptional overclocking headroom and the OC charts are simply overwhelming.
  • 0 Hide
    Tamz_msc , January 25, 2011 2:37 PM
    If this drops to 220$ or less in a couple of weeks, AMD will have no answer for it.
  • 1 Hide
    jprahman , January 25, 2011 2:38 PM
    Wow this kinda sucks, I built my LGA1156 i5-760, 2xGTX 460 rig three months ago. So now because of the Sandy Bridge launch and now this it's already obsolete.
  • 2 Hide
    rohitbaran , January 25, 2011 2:42 PM
    Well, it doesn't help bring the price of Radeon 6950 any lower. Once AMD launches the 1 GB version of Radeon 6950, this card will be in trouble.
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