Nvidia GTX780M specs, benchmarks leaked

Nvidia’s Geforce 700 series has been rumored to be a mere rebrand, re-using existing Kepler-based products but pricing them one rung down on the ladder. Because Kepler has made Nvidia so much money, they can afford to start a value war with AMD because they don’t have to pay for R&D any more.

Recently though, some benchmarks have leaked that point to the GTX780M being an unlocked GTX680M. The GTX680M had one shader module disabled to improve production yields and had 2GB of GDDR5 memory.

VideocardZ, a tech site based on Poland, managed to grab screenshots of a review on Chiphell that was taken down as quickly as it was put up. Some of the benchmarks are impressive.

: GeForce GTX780M 3DMark Performance

: Nvidia GTX780M Benchmark table

: Nvidia GTX780M Alan Wake

: Nvidia GTX780M Battlefield 3

: Nvidia GTX780M Far Cry 3

: Nvidia GTX780M Kingdoms of Amalur

: Nvidia GTX780M Skyrim

Based on the images in the leak, we can glean a few things. First, the GTX780M will have all eight shader modules enabled for a total of 1,536 CUDA cores and 32 ROPs (Raster Operator), which means this is a desktop GTX680 shoved into the laptop’s chassis. Core clocks seem to be set at 771MHz with memory at 1,250MHz (5GHz effective), and bandwidth is 160GB/s, which is respectable. Boost speeds are 797MHz.

From the specs table alone, one thing is clear – this card’s major bottleneck is the memory bandwidth. With 4GB of RAM on a 256-bit interface, it’s going to struggle with 1080p gameplay when you tack on the AA levels because there’s not enough memory bandwidth.

In GPU-limited titles like Battlefield 3 we see the most gains, with the GTX780M offering up to 66% better performance over the GTX680M. That drops to around 30% for Kingdoms of Amalur and Alan Wake. Skyrim, being CPU-limited, shows smaller gains of around 11%.

Its not as big a leap as the gap was between the GTX580M and the GTX680M, which was around 70% on average overall. This is merely a re-spin of the old tech, but with better performance in certain titles. If this review was done and dusted already, expect a launch of the Geforce 700 series at Computex Taipei in June 2013.