GeForce GTX 285 2GB vs GeForce GTX 965M

Intro

Compare all that to the GeForce GTX 965M, which comes with a core clock frequency of 944 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is comprised of 1024 SPUs, 64 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 144 Watts (240%)

Memory Bandwidth

Performance-wise, the GeForce GTX 285 2GB should theoretically be quite a bit superior to the GeForce GTX 965M overall. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 94976 (148%)

Texel Rate

The GeForce GTX 965M will be a little bit (about 17%) more effective at texture filtering than the GeForce GTX 285 2GB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 8576 (17%)

Pixel Rate

The GeForce GTX 965M should be much (approximately 46%) faster with regards to AA than the GeForce GTX 285 2GB, and also will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 9472 (46%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.