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 660 | GeForce GTX 660 Ti | |
|---|---|---|
| SMX | 5 | 7 |
| CUDA Cores* | 960 | 1344 |
| GPU | GK106 | Unknown |
| Memory Interface | 192-bit | 192-bit |
| Memory Type | 1536 MB GDDR5 | 2048MB GDDR5 |
| *If each SMX holds 192 cores | ||
- Source: Expreview
