GeForce 8800 GTS (G80) 320MB vs Radeon HD 6450 (OEM)

Intro

Compare those specifications to the Radeon HD 6450 (OEM), which comes with a core clock speed of 625 MHz and a GDDR3 memory frequency of 800 MHz. It also makes use of a 64-bit bus, and uses a 40 nm design. It is made up 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)		31 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 112 Watts (361%)

Memory Bandwidth

Performance-wise, the GeForce 8800 GTS (G80) 320MB should theoretically be much better than the Radeon HD 6450 (OEM) in general. (explain)

GeForce 8800 GTS (G80) 320MB		63360 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 50560 (395%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB should be quite a bit (about 392%) better at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 19624 (392%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 8800 GTS (G80) 320MB is the winner, and very much so. (explain)

GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 7760 (310%)

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 transferred across the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.