GeForce GTS 250 1GB vs Geforce GTX 770

Intro

Compare all of that to the Geforce GTX 770, which has GPU core speed of 1046 MHz, and 2048 MB of GDDR5 memory set to run at 1753 MHz through a 256-bit bus. It also features 1536 Stream Processors, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 1GB		145 Watts
Geforce GTX 770		230 Watts
	Difference: 85 Watts (59%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 770 should be 219% faster than the GeForce GTS 250 1GB in general, due to its greater bandwidth. (explain)

Geforce GTX 770		224384 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 153984 (219%)

Texel Rate

The Geforce GTX 770 should be much (approximately 183%) more effective at AF than the GeForce GTS 250 1GB. (explain)

Geforce GTX 770		133888 Mtexels/sec
GeForce GTS 250 1GB		47232 Mtexels/sec
	Difference: 86656 (183%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Geforce GTX 770 is superior to the GeForce GTS 250 1GB, by a large margin. (explain)

Geforce GTX 770		33472 Mpixels/sec
GeForce GTS 250 1GB		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 (in units of MB per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, the result should 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 texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.