GeForce GTS 250 512MB vs GeForce GTX 650

Intro

Compare that to the GeForce GTX 650, which comes with GPU core speed of 1058 MHz, and 1024 MB of GDDR5 RAM set to run at 1250 MHz through a 128-bit bus. It also is comprised of 384 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 81 Watts (127%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 650 should theoretically be a bit superior to the GeForce GTS 250 512MB overall. (explain)

GeForce GTX 650		80000 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 9600 (14%)

Texel Rate

The GeForce GTS 250 512MB is much (approximately 40%) faster with regards to texture filtering than the GeForce GTX 650. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 13376 (40%)

Pixel Rate

The GeForce GTX 650 should be quite a bit (more or less 43%) better at full screen anti-aliasing than the GeForce GTS 250 512MB, and also should be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 5120 (43%)

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 largest amount of information (measured in megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

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