NVIDIA GeForce GTX 660 Gets Detailed

Published: Jun 19th 2012, 23:42 GMT

NVIDIA GeForce GTX 660 Gets Detailed
Although we still have no accurate information about actual clock speeds, we finally have a first insight of some basic specs you would probably expect from such card.

User PHK is a VIP member of Expreview forums. He is a recognized source of many leaks. Unfortunately, he doesn’t mention GTX 660 name itself, but we may assume that he is referring to such mid-range card from NVIDIA.

If the translation is accurate, then we might expect a very short PCB (his post mentions number 4, as if those were inches, but that would be less than GT 640, so I don’t find this as actual length). What we are seeing here, is a new NVIDIA’s strategy in designing cards. It’s definitely easier to develop a new PCB and do some basic limitations to the GK104 GPU than creating a new one from scratch.

As PHK mentions further, GeForce GTX 660 will have 2GB 192-bit memory. Card will be equipped with dual-DVI, DisplayPort and one HDMI output. Card would be powered by 4-phase PWM design. What he also says is ‘single 6’. This could probably refer to the quantity of SMX clusters — 6 SMX are equal to 1152 CUDA cores. And finally total dissipated power is reported at 100 Watts.

Final specification of GeForce GTX 660 would like this:

  • 28nm GK104 Kepler GPU
  • 6 SMX clusters
  • 1152 CUDA Cores
  • 1.5 or 2GB of GDDR5 memory
  • 192-bit memory interface
  • Dual-DVI, DisplayPort and HDMI output
  • TDP of 100W

If the leak from Acer is correct, then we should expect first GeForce GTX 660 cards in a week. On the other hand, if KitGuru is right (huge overstock of GTX 570 delaying a launch of 660), then we shall wait until August.

UPDATE June 25th
Here are the newest specs, which are repeated on multiple Chinese forums.

 GeForce GTX 660GeForce GTX 660 Ti
CUDA Cores*9601344
Memory Interface192-bit192-bit
Memory Type1536 MB GDDR52048MB GDDR5
*If each SMX holds 192 cores

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