So which one should I get in the long run? I can't explain these differences and I have no idea why the 2gb is, granted slighly, but better than the 4gb version. Comparing the fps of high end games was also the same (for example both scored 28 fps on high settings on Metro: Last light), however on lighter games like fifa 2014, the asus scored 103 fps on high and the acer (with the 2gb gpu) had over 300 hundred. The other tests (3DM Fire (G)ēDMark 11 (G) U. For example in a review I read that the 2gb version on a acer v15 nitro scored 28377 on 3DM Cloud (G), whereas the 4gb version on the said asus g551jm scored only 20669. However benchmarks actually show the 2gb version performing better than the 4gb version and I am talking for both Maxwell, not the 4gb Kepler. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.I am debating which of these two GPUs to get.

ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. It is measured in millions of texels processed in a second.

The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second.

It especially helps with AA, HDR and high resolutions. The higher the card's memory bandwidth, the faster the card will be in general. In the case of DDR type memory, the result should be multiplied by 2 again. The number is worked out by multiplying the card's interface width by its memory speed. Memory Bandwidth: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved over the external memory interface in a second.

Nvidia geforce gtx 860m 2gb gddr5