GeForce GT 450 (OEM) vs Radeon HD 6750

Intro

Compare all of that to the Radeon HD 6750, which has a core clock frequency of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 128-bit bus, and uses a 40 nm design. It features 720 SPUs, 36 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
GeForce GT 450 (OEM)		106 Watts
	Difference: 20 Watts (23%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 450 (OEM) is 50% quicker than the Radeon HD 6750 overall, because of its greater data rate. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 32000 (50%)

Texel Rate

The Radeon HD 6750 should be quite a bit (more or less 38%) faster with regards to AF than the GeForce GT 450 (OEM). (explain)

Radeon HD 6750		26100 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 7140 (38%)

Pixel Rate

The GeForce GT 450 (OEM) is much (more or less 63%) better at anti-aliasing than the Radeon HD 6750, and should be able to handle higher resolutions without slowing down too much. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 7360 (63%)

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 max amount of information (counted in MB per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.