GeForce GTS 250 512MB vs Geforce GTX 770

Intro

Compare those specs to the Geforce GTX 770, which comes with clock speeds of 1046 MHz on the GPU, and 1753 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 512MB		145 Watts
Geforce GTX 770		230 Watts
	Difference: 85 Watts (59%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 770 should in theory be a lot better than the GeForce GTS 250 512MB overall. (explain)

Geforce GTX 770		224384 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 153984 (219%)

Texel Rate

The Geforce GTX 770 should be quite a bit (about 183%) more effective at anisotropic filtering than the GeForce GTS 250 512MB. (explain)

Geforce GTX 770		133888 Mtexels/sec
GeForce GTS 250 512MB		47232 Mtexels/sec
	Difference: 86656 (183%)

Pixel Rate

If using high levels of AA is important to you, then the Geforce GTX 770 is the winner, and very much so. (explain)

Geforce GTX 770		33472 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 21664 (183%)

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 (counted in megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, 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 number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.