NVIDIA GeForce GTX 770 2GB Review Feat. ASUS DirectCU II GTX 770

GeForce GTX 770 Speeds and Feeds

The GeForce GTX 770 is based off the GK 104 chip just like the GTX 680 and is also based on the 28nm process. There is not a lot of original content to be had this launch due to some major points, but we will cover them all the same. The cards ships with 8 SMX units that provide the 1536 CUDA cores that adds up the main processing power of the GeForce GTX770. The cards have the option of 2GB or 4GB configurations with a memory subsystem that consists of four 64-bit memory controllers that make up the 256-bit controller. One thing of note is that the new GTX 770 features the fastest memory ever as cards will ship with 7Gbps memory modules, the world’s fastest GDDR5 memory speed. Peak memory bandwidth is 224.3GB/sec – that’s 15% more memory bandwidth than last year’s GeForce GTX 680. Below you can see a chart of all the different specs of the reference based GeForce GTX 770 provided by the folks over at NVIDIA as well as the specs for the ASUS DC II version that has increased clock and boost speeds.

All reference GTX 770 cards will have a base clock speed of 1046MHz with a typical Boost clock 1058MHz. The ASUS DC II has a core clock of 1059MHZ versus the 1046MHZ seen on the reference design and the boost clock of the ASUS card is 1111MHZ and interesting number in itself.  The differences as far as the technology under the hood are essentially the same, with the main changes being in how the PCB was designed by NVIDIA, or by ASUS and the clock speeds being set on the cards right out of the box.  Its very interesting to see NVIDIA breaking new ground with having cards shipping with the fastest memory available as anything that pushes technology forward is always a good thing for the end user.

GPU Boost 2.0 

Just like we saw on the GTX 780, the 770 even though not based on the GK110 GPU, still features GPU Boost 2.0

With that in mind they’ve introduced GPU Boost 2.0 which changes the way the card dynamically overclocks.

The original GPU Boost 1.0 was designed to reach the highest possible clock speed while remaining within a predefined power target. NVIDIA engineers determined that GPU temperature is often a bigger inhibitor of performance than GPU power so the boost clock speeds are based on the GPU temperature target instead of the GPU power target.

The default temperature is set to 80C so the GPU will automatically boost to the highest clock frequency possible as long as the GPU temperature remains at 80C. Now because GPU Boost 2.0 is based off of the temperature target, you can raise the temperature limit to increase boost speeds or decrease the target to lower boost speeds and keep the card running cooler.

The GeForce Experience

The GeForce Experience which was downloaded over 2.5 million times around the world in it’s BETA release, is now ready to go and comes bundled with the launch of the GeForce GTX 780. The GeForce Experience is essentially a convenience gamers hub that automatically keeps your drivers up to date and also analyzes your game library and offers optimized game settings so you get the maximum in game detail, while squeezing the most performance out of your card.

Continue Reading: ASUS DirectCU II Specific Features

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