GeForce GTS 450 1GB vs GeForce GTX 750

Intro

Compare those specifications to the GeForce GTX 750, which comes with core clock speeds of 1020 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 RAM. It features 512 SPUs along with 32 TAUs and 16 ROPs.

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 in theory 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 should be much (more or less 30%) more effective at anisotropic filtering 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

If using a high resolution is important to you, then the GeForce GTX 750 is a better choice, by a large margin. (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 data (measured in megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.