KFA2 GeForce GTX 680 LTD OC 2048MB 1268mhz – SLI update

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Yesterday we published our UK exclusive review of the new strictly limited edition KFA2 GeForce GTX 680 LTD OC 2048MB with a staggering boost speed of 1,268mhz. If you missed the review, head over here for a recap. Our conclusion in one line? – if you have a nice fat bank balance then it is one of the most enjoyable ways to quickly part with £559.99.

Since we published the review, we received emails asking if we could run a few tests in Sli, and measure system power consumption. Today, we aim to please.

As we said in the main review, these cards are extremely difficult to find due to the tight threshold for 1,200mhz certification, and we are fortunate enough to have one of the samples in the UK.

We may be giving this away to one lucky reader but we first needed to first solve a tiny issue, how could we run SLI tests with a paired boost speed of 1268mhz? We only have one KFA2 LTD OC card at hand.

Regular readers will remember our recent review of the ARCTIC Accelero Xtreme III cooler. In this review we used the Asus GTX 680 Direct CU II TOP and spent a couple of hours modifying the card. The end result? A 16c core temperature reduction supported by a 22c VReg temperature drop.

ACC 4613 DxO1 300x200 KFA2 GeForce GTX 680 LTD OC 2048MB 1268mhz   SLI updateACC 4672 DxO2 300x200 KFA2 GeForce GTX 680 LTD OC 2048MB 1268mhz   SLI update

Above, the Asus GTX 680 Direct CU II TOP before modification (left) and after modification (right). The Accelero Xtreme III Cooler is without a doubt the highest performing air cooler for the GTX680.

P6302701 KFA2 GeForce GTX 680 LTD OC 2048MB 1268mhz   SLI update

We slotted this modified card into our high end system with the KFA2 GeForce GTX 680 LTD OC 2048MB 1268mhz boost. This is the same system we used for the last section of our review yesterday, here.

We will compare sections of this article against an array of performance leading graphics hardware from the current and last generation.

Ultra High End System:

Processor: Core i7 3960 X Extreme Edition @ 4.6ghz
Cooler: Antec 920 H20
Memory: 16GB G.Skill 2,400mhz @ 10-11-10-30
Motherboard: Asus Rampage IV Extreme
Power Supply: Enermax Platimax 1200W
Optical Drive
: Asus BluRay Drive
Chassis
: Lian Li PC-A77FR Aluminium Red Full Tower Case
Monitors
: Dell U3011, 3x Ilyama ProLite E2472HDD
Boot Drive: Patriot WildFire 120GB
Secondary Drive: 1TB Samsung
Monitor: Dell U3011

asus680topgpuz1 241x300 KFA2 GeForce GTX 680 LTD OC 2048MB 1268mhz   SLI updategpuz81 243x300 KFA2 GeForce GTX 680 LTD OC 2048MB 1268mhz   SLI update

Now the final part of the configuration was to match the speed of both cards. The Asus GTX 680 Direct CU II TOP ships at faster clock speeds than the reference card, 1137mhz on the core (from 1,006mhz), with a boost speed of 1,202mhz. This is however still significantly slower than the KFA2 GeForce GTX 680 LTD OC 2048MB which runs at 1,202mhz with a core boost of 1,268mhz.

msisetts1 KFA2 GeForce GTX 680 LTD OC 2048MB 1268mhz   SLI update

Using MSI Afterburner we ensure that the card speeds aren’t linked in the settings panel. We then overclock the Asus GTX 680 Direct CU II TOP to the same 1,202mhz core/1267mhz boost speeds.

gpuz10 243x300 KFA2 GeForce GTX 680 LTD OC 2048MB 1268mhz   SLI update

Both cards with the clock speeds matched, running in SLi. Thanks to the Accelero Xtreme III cooler the Asus GTX680 Direct CU II TOP has no problem running at these enhanced speeds. We used a minor Core Voltage increase for added stability.

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KFA2 GeForce GTX 680 LTD OC 2048MB 1268mhz - SLI update, 5.0 out of 5 based on 1 rating
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  • Seth

    good video cards, system you used is out of reach of almost everyone. id like the 3960X myself.

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  • http://yuri-goggles.com Black Gekikara

    Oh damn! The more I read all these reviews on the 680 the more I want one.

    Now this is a real wish that needs granting!

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  • Jordan

    I have that same card and was considering installing that same cooler on it. I didn’t want to have to remove the backplate and the support bracket to install it though. So did you guys remove them becuase you had to, or was there some other reason? Thanks

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  • zotacextreme

    this impressive beast is alot cheper in china……..asus top,gigabyte soc,msi lightning etc is are 5k++ but this card is 4k++ in china.

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