In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GT 640 are significantly better than the Intel HD Graphics 610.

The GeForce GT 640 has a 552 MHz higher core clock speed and 8 more Texture Mapping Units than the HD Graphics 610. This results in the GeForce GT 640 providing 20.5 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GeForce GT 640 has a 552 MHz higher core clock speed and 13 more Render Output Units than the HD Graphics 610. This results in the GeForce GT 640 providing 13.3 GPixel/s better pixeling performance. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The HD Graphics 610 was released over three years more recently than the GeForce GT 640, and so the HD Graphics 610 is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GeForce GT 640 when running the latest games.

The GeForce GT 640 has 2048 MB video memory, but the HD Graphics 610 does not have an entry, so the two GPUs cannot be reliably compared in this area.

The HD Graphics 610 has 192 Shader Processing Units and the GeForce GT 640 has 384. However, the actual shader performance of the HD Graphics 610 is 1613 and the actual shader performance of the GeForce GT 640 is 346. The HD Graphics 610 having 1267 better shader performance is not particularly notable, as altogether the GeForce GT 640 performs better when taking into account other relevant data.

The HD Graphics 610 transistor size technology is 14 nm (nanometers) smaller than the GeForce GT 640. This means that the HD Graphics 610 is expected to run slightly cooler and achieve higher clock frequencies than the GeForce GT 640.

The HD Graphics 610 requires 15 Watts to run and the GeForce GT 640 requires 65 Watts. We would recommend a PSU with at least 350 Watts for the GeForce GT 640, but we do not have a recommended PSU wattage for the HD Graphics 610. The GeForce GT 640 requires 50 Watts more than the HD Graphics 610 to run. The difference is significant enough that the GeForce GT 640 may have a slight adverse affect on your yearly electricity bills in comparison to the HD Graphics 610.