GeForce GTX 680 looks to be the name of NVIDIA’s first graphics card in the Kepler family and the card is expected to launch March 23rd, and the specifications have now surfaced. According to the latest rumors we will have plenty of CUDA cores and really fast GDDR5 memory.
NVIDIA’s first graphics circuit with 28 nanometer technology will be called GK104 and takes aim for the performance segment. It is not the most powerful circuit NVIDIA has to offer from the Kepler family, but performance will be sufficient to to put it on par with GeForce GTX 580. According to VR-Zone the final specifications for GeForce GTX 680 – the name(?) of the GK104 top model – has been revealed.
According to these rumors NVIDIA has focused more on more cores and filled the GK104 circuit with 1536 CUDA cores, which is three times more than GF110 at 512 CUDA cores. NVIDIA will according to VR-Zone continue to use asynchronous frequencies where the GPU logic operates at 705 MHz, while the 1500 CUDA cores operate twice as fast at 1411 MHz.
The memory bus is limited compared to the GeForce GTX 500 series, but the 256-bit wide memory bus works with 2GB GDDR5 memory at 6000 MHz, a new record for a reference card. The memory bandwidth lands at 192.4 GB/s, which is identical to GeForce GTX 580. There is no information on the number of texture units or ROPs, but according to estimates the GK104 GPU will measure ~320mm².
|Model||GTX 680 ”Kepler”||GTX 580 ”Fermi”||HD 7870 ”Southern Islands”|
||1536 st||512 st||1408 st|
||705 MHz||772 MHz||1000 MHz|
||1411 MHz||1544 MHz||–|
||2GB GDDR5||3 GB GDDR5||2 GB GDDR5|
||6.0 GHz||4.0 GHz||5.0 GHz|
||192 GB/s||192 GB/s||153.6 GB/s|
GeForce GTX 680 will be 25.5 cm long and use dual PCIe power connectors, either 2×6 pins or 1×6 pin + 1×8 pin. VR-Zone mentions that the stacked connectors seen on leaked pictures will probably not make it to retail. Other specifications include dual DVI ouputs and HDMI and DisplayPort ports.
The launch of NVIDIA’s new performance card GeForce GTX 680 will according to VR-Zone happen on March 23rd, but that already on March 12th the company will reveal more about the new graphics circuit.