GeForce 8800 GS vs Radeon HD 6450 (OEM)

Intro

Compare that to the Radeon HD 6450 (OEM), which features a clock speed of 625 MHz and a GDDR3 memory speed of 800 MHz. It also features a 64-bit memory bus, and makes use of a 40 nm design. It is comprised of 160 SPUs, 8 TAUs, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
GeForce 8800 GS		105 Watts
	Difference: 74 Watts (239%)

Memory Bandwidth

As far as performance goes, the GeForce 8800 GS should in theory be quite a bit better than the Radeon HD 6450 (OEM) in general. (explain)

GeForce 8800 GS		38400 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 25600 (200%)

Texel Rate

The GeForce 8800 GS will be quite a bit (more or less 428%) more effective at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

GeForce 8800 GS		26400 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 21400 (428%)

Pixel Rate

The GeForce 8800 GS is a lot (approximately 164%) faster with regards to full screen anti-aliasing than the Radeon HD 6450 (OEM), and also should be capable of handling higher resolutions more effectively. (explain)

GeForce 8800 GS		6600 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 4100 (164%)

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 (counted in 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. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.