GeForce GTS 250 512MB vs GeForce GTX 750

Intro

Compare those specifications to the GeForce GTX 750, which makes use of a 28 nm design. nVidia has clocked the core frequency at 1020 MHz. The GDDR5 RAM runs at a speed of 1250 MHz on this particular model. It features 512 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750		55 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 90 Watts (164%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 750 will be 14% quicker than the GeForce GTS 250 512MB in general, due to its greater data rate. (explain)

GeForce GTX 750		80000 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 9600 (14%)

Texel Rate

The GeForce GTS 250 512MB should be quite a bit (about 45%) faster with regards to AF than the GeForce GTX 750. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
GeForce GTX 750		32640 Mtexels/sec
	Difference: 14592 (45%)

Pixel Rate

The GeForce GTX 750 will be quite a bit (approximately 38%) better at full screen anti-aliasing than the GeForce GTS 250 512MB, and also will be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 750		16320 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 4512 (38%)

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 largest amount of data (in units of MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.