original Geforce GTX 260 has a stock core clock of 578MHz, with shaders at 1242MHz and
GDDR3 memory at 999MHz, Gigabyte has chosen to overclock the GV-N260C896H-GA for a
little extra power.
The GPU on the GV-N260C896H-GA videocard comes from the factory running at 630Mhz, with shaders at 1356MHz. The 896MB of GDDR3 memory has been
rounded up to an even 1000MHz.
understand where all this power comes from, we need to take a look at the nVidia
GeForce GTX260 GPU - a massive monolith of an IC sheathed behind its
heatspreader. Code named 'GT200', this graphics processor is actually the second
revision nVidia has made to its new next-generation graphics processors.
The nVidia GT200 GPU chip is designed with 240 total shader
processors. Each one is a tiny processor that can compute either pixel or vertex
mathematical operations. The processors are designed to operate on graphical
information simultaneously, with each shader processor is operating on a single
pixel per cycle.
shader processors are broken up into clusters of 24, called Texture/Processor
Clusters. In addition to the shader processors, the clusters also include a
texturing array and a geometry controller. While the high end nVidia Geforce GTX
280 graphics card has all 10 of the GT200's TPCs enabled, the original Geforce
GTX 260 had only 8 of the 10 TPCs enabled, the remaining two are either disabled
or had defects that caused them to fail in nVidia's quality assurance testing.
Geforce GTX260 Core 216 videocard that PCSTATS is tested today actually has an
additional TPC enabled, so there are 9 clusters of 24 shader processors, for a
total of 216 shader processors. This translates into a bit of extra shader
muscle and texturing savvy. The GT200 GPU is oriented around shader processing
and calculation, designed for games that utilize intense special effects like
high dynamic range lighting, geometry distortion and dynamic reflections.
In addition to the increased shader cores, nVidia has also
managed to get the GT200 GPU's 1.4 billion transistors shrunk down to a 55nm
process. While the original 65nm GT200 die was a massive 576mm2, the die-shrink brings the overall die size down to
487mm2. Shrinking the overall size of the chip
influences power consumption, heat output and of course price.
nVidia's GT200 processors are big. At the time it was produced, nVidia's 65nm
GT200 GPUs were the biggest processor dies that the Taiwan Semiconductor
Corporation ever fabricated.
The videocard has two SLI
connectors so it can be paired with either one or two additional Geforce