GeForce GTS 250 1GB vs GeForce GTX 650

Intro

Compare all that to the GeForce GTX 650, which makes use of a 28 nm design. nVidia has set the core frequency at 1058 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this specific card. It features 384 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTS 250 1GB		145 Watts
	Difference: 81 Watts (127%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 650 should in theory be a small bit better than the GeForce GTS 250 1GB overall. (explain)

GeForce GTX 650		80000 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 9600 (14%)

Texel Rate

The GeForce GTS 250 1GB will be a lot (more or less 40%) more effective at AF than the GeForce GTX 650. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 13376 (40%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 650 is the winner, by far. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce GTS 250 1GB		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 max amount of data (in units of megabytes per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 applied in one second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.