ZOTAC GeForce GTX 680 Graphics Card SLI Performance Review

2. Kepler Overview4. Test System and Methodology


ZOTAC GeForce GTX 680 SLI Graphics Card Review

ZOTAC GeForce GTX 680 2GB Graphics Card

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ZOTAC package their GTX 680 in a box which has styling similar to their other products with plenty of information on features displayed. Inside we find a decent bundle which includes power cables, documentation and trial software including a 3-day pass for Trackmania. Also included are three games, all from the Assassins Creed franchise. One wouldn’t have added much value as they are older games but the inclusion of all three sets the consumer up well for Assassins Creed 3 later this year.

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Shown above is the ZOTAC GTX 680 card and without doubt it looks like the reference NVIDIA card, with colour flashes and branding for the manufacturer. Turning round to the back of the card we can see that NVIDIA use a black 10" PCB, that the memory is all on the front of the product and that two SLI connectors are present which lets us know we can connect multiple cards together for enhanced performance.

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Underneath the black and yellow plastic shroud is a block of aluminium fins with the acoustically dampened fan directly beside them, passing air through and out of the bracket at the end of the card. Underneath these fins is a copper GPU block with three heatpipes and sitting below that cooler are eight GDDR5 memory chips as well as the 28nm Kepler/GK104 core containing 3.54 billion transistors.

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Click here for full resolution 5760×1080

Around at the card outputs we have four present on each GTX 680 with two Dual-Link DVIs starting us off, followed by a HDMI 1.4a and then a full size DisplayPort 1.2 connector. The GTX 680 is capable of running four screens at one time with three available for surround gaming at resolutions such as 5760×1080 and the fourth running off a separate controller for desktop applications such as messaging. It is also worth noting that NVIDIA now offer bezel correction hotkeys for quick in-game changes to show any hidden content and that when setting up three screens we simply click the enable option, follow the simple wizard which allows us to drag and drop the right order making the process easy. As an extra touch the taskbar is now present on the centre display and we can maximise windows to individual screens not just the entire bank of displays.

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In terms of power requirements we have two 6-pin connectors which point out the top of the card rather than the back. The GTX 680 has a rated TDP of 195w and runs on a four phase power design for the GPU with two further phases for the memory.

The reference specifications for the GeForce GTX 680 are 1006MHz core (base clock) with a boost clock of 1058MHz and the 2GB of GDDR5 memory is set to 3004MHz. There are 128 Texture units within the core along with 32 ROPS, 4 graphics processing clusters and 8 streaming multiprocessors. For the CUDA Cores NVIDIA have gone for a 1536 "core" design and our memory bus is 256-bit (4×64). PCIe 3.0, DirectX 11.1 and DirectCompute are all supported on this card as is acceleration of high definition content and the card can output 7.1 audio over HDMI as well as support PhysX, 4K displays and 3D Vision.

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