Meet The Gigabyte GeForce GTX 660 Ti OC

Our final GTX 660 Ti of the day is Gigabyte’s entry, the Gigabyte GeForce GTX 660 Ti OC. Unlike the other cards in our review today this is not a semi-custom card but rather a fully-custom card, which brings with it some interesting performance ramifications.

GeForce GTX 660 Ti Partner Card Specification Comparison
  GeForce GTX 660 Ti(Ref) EVGA GTX 660 Ti Superclocked Zotac GTX 660 Ti AMP! Gigabyte GTX 660 Ti OC
Base Clock 915MHz 980MHz 1033MHz 1033MHz
Boost Clock 980MHz 1059MHz 1111MHz 1111MHz
Memory Clock 6008MHz 6008MHz 6608MHz 6008MHz
Frame Buffer 2GB 2GB 2GB 2GB
TDP 150W 150W 150W ~170W
Width Double Slot Double Slot Double Slot Double Slot
Length N/A 9.5" 7.5" 10,5"
Warranty N/A 3 Year 3 Year + Life 3 Year
Price Point $299 $309 $329 $319

The big difference between a semi-custom and fully-custom card is of course the PCB; fully-custom cards pair a custom cooler with a custom PCB instead of a reference PCB. Partners can go in a few different directions with custom PCBs, using them to reduce the BoM, reduce the size of the card, or even to increase the capabilities of a product. For their GTX 660 Ti OC, Gigabyte has gone in the latter direction, using a custom PCB to improve the card.

On the surface the specs of the Gigabyte GeForce GTX 660 Ti OC are relatively close to our other cards, primarily the Zotac. Like Zotac Gigabyte is pushing the base clock to 1033MHz and the boost clock to 1111MHz, representing a sizable 118MHz (13%) base overclock and a 131MHz (13%) boost overclock respectively. Unlike the Zotac however there is no memory overclocking taking place, with Gigabyte shipping the card at the standard 6GHz.

What sets Gigabyte apart here in the specs is that they’ve equipped their custom PCB with better VRM circuitry, which means NVIDIA is allowing them to increase their power target from the GTX 660 Ti standard of 134W to an estimated 141W. This may not sound like much (especially since we’re working with an estimate on the Gigabyte board), but as we’ve seen time and time again GK104 is power-limited in most scenarios. A good GPU can boost to higher bins than there is power available to allow it, which means increasing the power target in a roundabout way increases performance. We’ll see how this works in detail in our benchmarks, but for now it’s good enough to say that even with the same GPU overclock as Zotac the Gigabyte card is usually clocking higher.

Moving on, Gigabyte’s custom PCB measures 8.4” long, and in terms of design it doesn’t bear a great resemblance to either the reference GTX 680 PCB nor the reference GTX 670 PCB; as near as we can tell it’s completely custom. In terms of design it’s nothing fancy – though like the reference GTX 670 the VRMs are located in the front – and as we’ve said before the real significance is the higher power target it allows. Otherwise the memory layout is the same as the reference GTX 660 Ti with 6 chips on the front and 2 on the back. Due to its length we’d normally insist on there being some kind of stiffener for an open air card, but since Gigabyte has put the GPU back far enough, the heatsink mounting alone provides enough rigidity to the card.

Sitting on top of Gigabyte’s PCB is a dual fan version of Gigabyte’s new Windforce cooler. The Windforce 2X cooler on their GTX 660 Ti is a bit of an abnormal dual fan cooler, with a relatively sparse aluminum heatsink attached to unusually large 100mm fans. This makes the card quite large and more fan than heatsink in the process, which is not something we’ve seen before.

The heatsink itself is divided up into three segments over the length of the card, with a pair of copper heatpipes connecting them. The bulk of the heatsink is over the GPU, while a smaller portion is at the rear and an even smaller portion is at the front, which is also attached to the VRMs. The frame holding the 100mm fans is then attached at the top, anchored at either end of the heatsink. Altogether this cooling contraption is both longer and taller than the PCB itself, making the final length of the card nearly 10” long.

Finishing up the card we find the usual collection of ports and connections. This means 2 PCIe power sockets and 2 SLI connectors on the top, and 1 DL-DVI-D port, 1 DL-DVI-I port, 1 full size HDMI 1.4 port, and 1 full size DisplayPort 1.2 on the front. Meanwhile toolless case users will be happy to see that the heatsink is well clear of the bracket, so toolless clips are more or less guaranteed to work here.

Rounding out the package is the usual collection of power adapters and a quick start guide. While it’s not included in the box or listed on the box, the Gigabyte GeForce GTX 660 Ti OC works with Gigabyte’s OC Guru II overclocking software, which is available on Gigabyte’s website. Gigabyte has had OC Guru for a number of years now, and with this being the first time we’ve seen OC Guru II we can say it’s greatly improved from the functional and aesthetic mess that defined the previous versions.

While it won’t be winning any gold medals, in our testing OC Guru II gets the job done. Gigabyte offers all of the usual tweaking controls (including the necessary power target control), along with card monitoring/graphing and an OSD. It’s only real sin is that Gigabyte hasn’t implemented sliders on their controls, meaning that you’ll need to press and hold down buttons in order to dial in a setting. This is less than ideal, especially when you’re trying to crank up the 6000MHz memory clock by an appreciable amount.

Wrapping things up, the Gigebyte GeForce GTX 660 Ti OC comes with Gigabyte’s standard 3 year warranty. Gigabyte will be releasing it at an MSRP of $319, $20 over the price of a reference-clocked GTX 660 Ti and $10 less than the most expensive card in our roundup today.

Meet The Zotac GeForce GTX 660 Ti AMP! Edition The First TXAA Game & The Test


View All Comments

  • blanarahul - Thursday, August 16, 2012 - link

    First! Oh yeah! Reply
  • blanarahul - Thursday, August 16, 2012 - link

    GTX 660 Ti: Designed for overclockers. Overclock memory and thats it. Reply
  • CeriseCogburn - Thursday, August 23, 2012 - link

    The cores are hitting over 1300 consistently. Oh well, buh bye amd. Reply
  • Galidou - Monday, August 27, 2012 - link

    Well it depends on the samples, the 660 ti I bought for my wife, I tested it in my pc and over 1290 core clock(with boost) after 10-15 minutes gaming in a game that doesn't even taxes the gpu past 70%, the video card crashes and windows tells me ''the adapter has stopped responding''.

    Crysis 2 stutters on some levels but it's mainly stable 95% of the time wheras my 7950 overclocked is not doing this.

    It would artifact in MSI kombustor with a slight increase in voltage and core clock above 1260. Good thing it's for my wife and not me, she won't overclock as it's way enough for her mere 1080p resolution. The memory overclocks at 6,6ghz easily.
  • GmTrix - Friday, August 17, 2012 - link

    Dear God, Have AnandTech readers really sunk to this level of childishness? Reply
  • Chaitanya - Friday, August 17, 2012 - link

    shocking. Reply
  • CeriseCogburn - Sunday, August 19, 2012 - link

    Thank you nVidia for having real technology developement, unlike amd loser
    Thank you nVidia for being able to mix ram chip sizes or to distribute ram chips across your memory controllers with proprietary technology that you keep secret depsite amd fanboys desiring to know how you do it so they can help amd implement for free.
    Thanks also for doing it so well, even with reviewers putting it down and claiming it can result in 48 bandwidth instead of 144 bandwidth, all the games and tests they have ever thrown at it in a desperate amd fanboy desire to find a chink in it's armor has yielded ABSOLUTELY NOTHING, as in, YOU'VE DONE IT PERFECTLY AGAIN nVidia.
    I just love the massive bias at this site.
    It must be their darn memory failing.
    Every time they make a crazy speculative attack here on nVidia where all their rabid research to find some fault provides a big fat goose egg, they try to do it again anyway, and they talk like they'll eventually find something even though they never do. By the time they give up, they're off on some other notional and failed to prove it put down against nVidia.
    192 bit bus / 2GB ram / unequal distribution / PERFECT PERFORMANCE IMPLEMENTATION
    Get used to it.
  • TheJian - Sunday, August 19, 2012 - link

    ROFL... I should have just read more posts...Might have saved me a crapload of typing Cerise...LOL. Nah, it needs to be said more by more than ONE person :) Call a spade a spade people.

    I tried to leave out the word BIAS and RYAN/Anandtech in the same sentence :)

    But hold on a minute, while I fire up my compute crap (or 2008 game rendered moot by it's own 2011+2012 hires patch equivalent) so I can run up my electric bill so I can prove the AMD card wins in something I never intend to use a gaming card for or run at a res that these things aren't being used for by 98% of the people. Folding? You must be kidding. Bitcoin hunting?...LOL that party was over ages ago - you won't pay for your card getting bitcoins today - it was over before anandtech did their article on bitcoins - but I bet they helped sell some AMD cards. Quadro+fireGL cards are for this crap (computational NON game stuff I mean). Recommending cards based on computational crap is pointless when they're for gaming.

    I'm an amd fanboy but ONLY at heart. My wallet wins all arguments regardless of my love for AMD (or my NV stock...LOL). I'm trying to hold out for AMD's next cpu's but I'm heavily leaning Ivy K for Black Friday, fanboy AMD love or not. They ruined their company by paying 3x the price for ATI, which in turn crapped on their stock and degraded their company to near junk bond status in said stock (damn them, I used to be able to ride the rollercoaster and make money on AMD!). I'm still hoping for a trick up their sleeve nobody knows about. But I think they're just holding back cpu's to clear shelves, nothing special in the new ones coming. Basically a sandy to ivy upgrade but on AMD's side for bullsnozer. The problem is it's still going to be behind ivy by 25-50% (in some cases far worse). Unless it's an EXCEPTIONAL price I can't help but pick IVY as I do a lot of rar/par stuff and of course gaming. I'd get hurt way too much by following my heart this round (I had to take xeon e3110 s775 last time for the same reason).

    My planned Black Friday upgrade looks like, X motherboard (too early for a pick or homework not knowing AMD yet), Ivy 3770K (likely) and a 660TI with the highest default clock I can get at a black friday price :) (meaning $299 or under for zotac AMP speeds or better). I already have 16GB ddr3 waiting here...LOL. I ordered it ages ago, figuring it's going to go through the roof at some point (win8? crappy as it is IMHO). I'm only down $10 so far after purchasing mem I think in Jan or so...LOL. In the end I think I'll be up $30-80 at some point (I only paid $75 for 16GB). Got my dad taken care of too, we're both just waiting on black friday and all this 28nm vid card crap to sort out. End of Nov should have some better tsmc cards available (or another fabs chips?). I'm guessing a ton at high clocks by then for under $299.

    Anyway, THANKS for the good laugh :) I needed that after reading my 4th asinine review. Guru3d looking up for the 5th though...LOL. He doesn't seem to care who wins, & caters more to the wallet it seems (great OC stuff there too). He usually doesn't have a ton of cards or chips in each review though, so you have to read more than one product review there to get the picture, but they're good reviews. Hilbert Hagedoorn (sp?) does pretty dang good. By the end of it, I'll have hit everyone I think (worth mentioning, techreport, hardocp, ixbtlabs, hexus etc - sorry if I left a good one out guys). I seem to read 10+ these days before parting with cash. :( I like hardocp for a difference in ideas of benchmarking. He benches and states the HIGHEST PLAYABLE SETTINGS per card. It's a good change IMHO, though I still require all the other reviews for more games etc. I'm just sure to hit him for vidcard reviews just for the settings I can expect to get away with in a few games. I wish guru3d had thrown in an OC'd 660TI into the 7950 boost review since they're so easily had clocked high at $299/309. But one more read gets that picture, or can be drawn by all the asinine reviews and his 7950 boost review...LOL. I have to get through the rest of guru3d, then off to hardocp for the different angle :) Ahh, weekend geek reading galore with two new gpu cards out this week ;)
  • Jorgan22 - Sunday, October 7, 2012 - link

    Review was a good read, glad to see the 660 TI is doing well.

    I have no idea what's up with the comments though, especially you TheJian, you wrote a novel, ending half the paragraphs with "... LOL".

    If you're going to waste so much time doing that, post it in the forums, not in a comment thread where its not going to get read buddy, just hurts you.
  • RussianSensation - Sunday, August 19, 2012 - link

    1) TXAA is a blurry mess. See videos or screenshots. It's an option but let's not try claiming it's some new revolutionary anti-aliasing features.

    Instead HD7950 can actually handle MSAA and mods in Skyrim and Batman AC and not choke.

    2) That review left 2 critical aspects out:

    (I) Factory preoverclocked, binned after-market 7950s run cooler, quieter and at way lower voltage than that reference artificially overvolted 7950B card tested in the review (see MSI TwinFrozr 3, Gigabyte Windforce 3x for $320-330 on Newegg).

    (II) Those same after-market 7950s hit 1100-1200mhz on 1.175V or less in our forum. At those speeds, the HD7950 > GTX680/HD7970 Ghz Edition. How is that for value at $320-330?

    The review didn't take into account that you can get way better 7950 cards and they overclock 30-50%, and yet the same review took after-market 660Tis and used their coolers for noise testing and overclocking sections against a reference based 7950.

    Let's see how the 660Ti does against the $320 MSI TwinFrozr 7950 @ 1150mhz with MSAA on in Metro 2033, Crysis 1/Warhead, Anno 2070, Skyrim with ENB Mods w/8xMSAA, Batman AC w/8xMSAA, Dirt Showdown, Sleeping Dogs, Sniper Elite V2, Serious Sam 3, Bulletstorm, Alan Wake, Crysis 2 with MSAA. It's going to get crushed, that's what will happen.

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