GeForce GT 450 (OEM) vs Radeon HD 6750

Intro

Compare those specifications to the Radeon HD 6750, which has a clock speed of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It is comprised of 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

In theory, the GeForce GT 450 (OEM) should be much faster than the Radeon HD 6750 in general. (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 a lot (more or less 38%) better at texture filtering 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) should be a lot (approximately 63%) faster with regards to anti-aliasing than the Radeon HD 6750, and will be capable of handling higher resolutions while still performing well. (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: Bandwidth is the maximum amount of data (in units of MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 are applied per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the card will be at 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 its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.