GeForce GTX 275 vs GeForce GTX 850M

Intro

Compare those specs to the GeForce GTX 850M, which features a clock speed of 876 MHz and a DDR3 memory speed of 1000 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GTX 275		219 Watts
	Difference: 179 Watts (448%)

Memory Bandwidth

In theory, the GeForce GTX 275 should perform a lot faster than the GeForce GTX 850M overall. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 95008 (297%)

Texel Rate

The GeForce GTX 275 is a lot (approximately 45%) more effective at anisotropic filtering than the GeForce GTX 850M. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 15600 (45%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 275 is the winner, and very much so. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 3708 (26%)

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: Bandwidth is the max amount of data (counted in MB per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.