GeForce GT 450 (OEM) vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which comes with core clock speeds of 800 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 512 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
GeForce GT 450 (OEM)		106 Watts
	Difference: 51 Watts (93%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 450 (OEM) should be much faster than the Radeon HD 7750 in general. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 24000 (33%)

Texel Rate

The Radeon HD 7750 is much (more or less 35%) better at anisotropic filtering than the GeForce GT 450 (OEM). (explain)

Radeon HD 7750		25600 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 6640 (35%)

Pixel Rate

The GeForce GT 450 (OEM) will be quite a bit (more or less 48%) faster with regards to anti-aliasing than the Radeon HD 7750, and also will be capable of handling higher screen resolutions better. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 6160 (48%)

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 maximum amount of information (in units of megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's 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 texture map elements (texels) that can be processed per second. This is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.