GeForce 8800 Ultra vs Radeon HD 6450 (OEM)

Intro

Compare those specifications to the Radeon HD 6450 (OEM), which has a core clock speed of 625 MHz and a GDDR3 memory frequency of 800 MHz. It also features a 64-bit bus, and uses a 40 nm design. It is comprised of 160 SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
GeForce 8800 Ultra		171 Watts
	Difference: 140 Watts (452%)

Memory Bandwidth

In theory, the GeForce 8800 Ultra should be 710% quicker than the Radeon HD 6450 (OEM) overall, because of its higher bandwidth. (explain)

GeForce 8800 Ultra		103680 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 90880 (710%)

Texel Rate

The GeForce 8800 Ultra is a lot (approximately 683%) better at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

GeForce 8800 Ultra		39168 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 34168 (683%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 8800 Ultra is superior to the Radeon HD 6450 (OEM), by far. (explain)

GeForce 8800 Ultra		14688 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 12188 (488%)

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 largest amount of data (measured in megabytes per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock 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 most pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.