2011 09. Mrz

[Bugfix] Gigabyte GTX 560 Ti OC – Stable Clock & GPU-Voltage Settings (VDDC)

In my previous post I pointed to some stability issues with my Gigabyte GTX 560 Ti OC, which I seem to have in common with lots of folks out there.

I’m starting to believe, that Gigabyte has (had?) some issues during manufacturing the Gigabyte GTX 560 Ti OC cards instead of assuming that the problem lies with NVIDIA’s chip itself. I came to that conclusion as I experimented with voltages and clock speeds and found the following:

  • STABLE: GPU 850 MHz, Shader 1700 MHz, VRAM 2000 MHz, VDDC 0,950V
  • UNSTABLE: GPU 900 MHz, Shader1800 MHz, VRAM 2000 MHz, VDDC 1,025V
  • STABLE: GPU 900 MHz, Shader 1800MHz, VRAM 2000 MHz, VDDC 1,062V

As you can see: it takes an astonishing 0,112V bump in VDDC (+11,8%)  to get the 50MHz up to the Gigabyte GTX 560 Ti OC’s factory overclock, on the other hand the card is capable of running at a low VDDC of only 0,950V for 850MHz which still is above the 822MHz standard clock of the 560 Ti chip.

So I assume that the problems occuring are more related to insufficiencies connected to single components of the card rather than the GF114 chip.

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