GeForce GTX 285 2GB vs Radeon HD 6450 (OEM) 1GB

Intro

Compare that to the Radeon HD 6450 (OEM) 1GB, which has a core clock frequency of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also makes use of a 64-bit memory bus, and makes use of a 40 nm design. It is comprised of 160 SPUs, 8 TAUs, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 173 Watts (558%)

Memory Bandwidth

In theory, the GeForce GTX 285 2GB is 452% faster than the Radeon HD 6450 (OEM) 1GB in general, because of its greater bandwidth. (explain)

GeForce GTX 285 2GB		158976 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 130176 (452%)

Texel Rate

The GeForce GTX 285 2GB will be a lot (about 764%) better at AF than the Radeon HD 6450 (OEM) 1GB. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 45840 (764%)

Pixel Rate

The GeForce GTX 285 2GB will be quite a bit (approximately 591%) faster with regards to anti-aliasing than the Radeon HD 6450 (OEM) 1GB, and capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 17736 (591%)

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 largest amount of information (counted in megabytes per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 number of texture map elements (texels) that are applied per 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 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 record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.