GeForce GTS 450 1GB vs Radeon HD 4670 512MB

Intro

Compare all of that to the Radeon HD 4670 512MB, which features a clock speed of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory speed of 1000 MHz. It also uses a 128-bit memory bus, and uses a 55 nm design. It features 320(64x5) SPUs, 32 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
GeForce GTS 450 1GB		106 Watts
	Difference: 36 Watts (51%)

Memory Bandwidth

Theoretically, the GeForce GTS 450 1GB should perform a lot faster than the Radeon HD 4670 512MB in general. (explain)

GeForce GTS 450 1GB		57728 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 25728 (80%)

Texel Rate

The GeForce GTS 450 1GB is a small bit (about 4%) better at texture filtering than the Radeon HD 4670 512MB. (explain)

GeForce GTS 450 1GB		25056 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 1056 (4%)

Pixel Rate

The GeForce GTS 450 1GB should be much (more or less 109%) better at anti-aliasing than the Radeon HD 4670 512MB, and also capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTS 450 1GB		12528 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 6528 (109%)

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 information (in units of megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.