GeForce GTS 450 1GB vs GeForce GTX 750

Intro

Compare all that to the GeForce GTX 750, which uses 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 card. It features 512 SPUs along with 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 450 1GB		106 Watts
	Difference: 51 Watts (93%)

Memory Bandwidth

Performance-wise, the GeForce GTX 750 should theoretically be much superior to the GeForce GTS 450 1GB overall. (explain)

GeForce GTX 750		80000 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 22272 (39%)

Texel Rate

The GeForce GTX 750 is a lot (approximately 30%) more effective at AF than the GeForce GTS 450 1GB. (explain)

GeForce GTX 750		32640 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 7584 (30%)

Pixel Rate

The GeForce GTX 750 is quite a bit (more or less 30%) more effective at full screen anti-aliasing than the GeForce GTS 450 1GB, and able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 750		16320 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 3792 (30%)

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 max amount of information (in units of MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs 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 fill rate also depends on lots of 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.