GeForce GT 450 (OEM) vs Radeon HD 5670

Intro

Compare those specs to the Radeon HD 5670, which makes use of a 40 nm design. AMD has set the core frequency at 775 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this specific model. It features 400(80x5) SPUs along with 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
GeForce GT 450 (OEM)		106 Watts
	Difference: 45 Watts (74%)

Memory Bandwidth

In theory, the GeForce GT 450 (OEM) should be 50% quicker than the Radeon HD 5670 overall, because of its greater data rate. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 32000 (50%)

Texel Rate

The GeForce GT 450 (OEM) should be much (approximately 22%) better at AF than the Radeon HD 5670. (explain)

GeForce GT 450 (OEM)		18960 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 3460 (22%)

Pixel Rate

The GeForce GT 450 (OEM) should be quite a bit (more or less 206%) better at anti-aliasing than the Radeon HD 5670, and also capable of handling higher resolutions while still performing well. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 12760 (206%)

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 maximum amount of data (measured in megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated 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 outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.