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i3DSpeed, January 2013

NVIDIA GeForce GTX 660 Ti 2048 MB 192-bit GDDR5 (915-1015/6000 MHz)

Andrey Vorobiev; February 4, 2013

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On the example of Palit JetStream GeForce GTX 660 Ti 2048MB 192-bit GDDR5 (915-1015/6000 MHz).


  • GPU: GeForce GTX 660 Ti (GK104)
  • Interface: PCIe 3.0 x16
  • GPU clock rate (ROPs/shaders): 1008-1100/1008-1100 MHz (the standard is 915-980/915-1030 MHz)
  • Memory clock rate, physical (effective): 1525 (6100) MHz (the standard is 1500 (6000) MHz)
  • Memory bus: 192-bit
  • Stream processors: 1344
  • Texture units: 112 (BLF/TLF/ANIS)
  • ROP units: 24
  • Dimensions: 247x112x33 mm
  • Board color: black
  • Power consumption (3D peak/2D/idle): 161/59/44 W
  • Display connectors: Dual-Link DVI-I, Dual-Link DVI-D, HDMI, DisplayPort
  • Multi-GPU mode: hardware SLI

This card has two 6-pin supplementary power connectors.

How does one make a graphics card with a 192-bit bus and yet with 2GB of video memory? Usually, 2048MB are provided by 8 x 2Gbit chips handled by a 256-bit bus. To use a 192-bit bus and still have 2GB video memory, one would need something like 12 memory chips of different capacity. However, in this case we see 8 x 2Gbit memory chips, yet two of the three 64-bit memory controllers work as usual, each with 2 memory chips (2 x 32-bit = 64-bit), and the third controller works with 4 memory chips (4 x 16-bit = 64-bit). This is obviously cheaper than going with 12 memory chips.

Maximum resolutions and frequencies:

  • 240 Hz maximum refresh rate
  • 2560 x 1600 @ 60Hz max. digital resolution
  • 2048 x 1536 @ 85Hz max. VGA resolution

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