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Nvidia GeForce GTX 660 Ti Review (Part 1/3) – Gigabyte’s Windforce OC Edition

Nvidia's Kepler, although arriving much later to the 28nm game, has proven itself to be a credible competitor to the Southern Islands offerings of AMD, excelling in mainstream gaming performance and energy efficiencies. What happens if you take the already cut-down 7 SMX units in the GK104 die of GTX 670 and further curtail its memory bandwidth? Well, we get a still surprisingly strong GTX 660Ti that can take on the big boys when overclocked.

The first GTX 660Ti that we will be reviewing at VR-Zone.com is Gigabyte's Windforce OC Edition 2GB, which has a different cooler and a slight overclock over the usual reference blower offerings.

From left to right – the different GK104 cores (28nm TSMC, 3.54 million transistors) that powers the GTX 660Ti, GTX 670 and GTX 680 and a table detailing their differences.



GTX 670

GTX 680







Texture Units



Memory Bandwidth




Memory Size / Type


Core Clock

915 MHz

1006 MHz

Boost Clock

980 MHz

1058 MHz

Memory Clock

1502 MHz






Like the earlier GTX 670, the GTX 660Ti uses a cut down die with one disabled SMX unit. One of its four memory controllers have also been disabled, giving it an effective 192-bit GDDR5 bus for transfers.


Our review sample came in a box without any accessories or documentation. We expect the retail bundle to be less spartan.


Like the other recent Keplers, the GTX660Ti retains the same I/O configuration, with two DVI ports augmented by a HDMI and DisplayPort connector. Nvidia's 3D Surround technology is also supported.


Gigabyte's Windforce card uses a custom blue 2oz copper PCB, and measures 10-inches long with the HSF.


Although the TDP is rated at a small form factor friendly 150W, Gigabyte decided to give the card some power headroom for overclocking by including 2 x 6-pin PCIe (meaning 225W including PCIe slot power).

Lennard Seah
Why can't I have sharks with frickin' laser beams attached to their heads

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