MSI GTX 770 N770 TF 2GD5/OC Reviewccokeman -
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MSI GTX 770 Gaming Closer Look:
Since I will be comparing the MSI GTX 770 Gaming to the reference card in several sections, it's only fair that we show it off as well seeing this is a launch article. Looking at the GTX 770 you get a sense of Déjà vu; think back to last week with the GTX 780 and a couple months back with GTX Titan, and you get a pretty clear picture of the product stack. The GTX 770 looks, for all intents and purposes, just like the heavy hitters in the GTX lineup. The smooth-looking aluminum shroud with the clear polycarbonate window over the same vapor chamber-equipped cooling system employed on the GTX 780 just looks right. Again the only way visually to tell the cards apart is the naming embossed at the front end of the card. At 10.5 inches long it is slightly longer than the MSI non-reference card but still is not long enough to present any challenges fitting in mid tower chassis.
Display connectivity is standard for the Kepler core with two Dual-Link DVI, one HDMI1.4a, and one DisplayPort that allow support for up to four displays in a 3+1 configuration. The back side of the GTX 770 is open much like on the GTX 780 and GTX Titan to allow the incoming airflow to start cooling the PWM circuit before cooling the GPU core.
A pair of SLI bridge connections sit at the top front of the PCB showing support for at least three cards in a motherboard that supports the technology. The recommended power supply for the GTX 770 is 600 watts with power fed to the card via 6-pin and 8-pin PCIe power connections that support the 230 watt TDP of the GTX 770.
Under the hood the GTX 770 is equipped with a 3.54 billion transistor 28nm GK104 Kepler core. It is equipped with a quartet of Graphics Processing Clusters that house eight SMX each with 192 CUDA cores for a total of 1536 on board, each sharing the 512KB L2 cache. A total of 128 texture units and 32 ROPs round out the hardware in the core. GDDR5 memory is used on the GTX 770. The GTX 770's 224.3 GB/s total memory bandwidth comes by way of 2GB of high speed 7010MHz QDR GDDR5 running through four 64-bit memory controllers. That's right, I said 7010MHz! That's before any overclocking is used. The GK104 core used on the GTX 770 supports GPU Boost Technology 2.0 to dynamically raise the clock speeds more so against a temperature limit than a power load limit. Base clock speeds on this reference version of the GTX 770 are 1046MHz with a boost clock of 1085MHz. The high speed GDDR5 memory starts at 7010MHz and the GTX 770 is the first card to use 7Gbps memory.
Under the skin we similar clock speeds but the key is just how well will the reference card give up to the MSI GTX 770 Gaming in terms of raw performance?