GeForce 8800 GTS (G80) 320MB vs GeForce GT 450 (OEM)

Intro

Compare those specifications to the GeForce GT 450 (OEM), which comes with GPU clock speed of 790 MHz, and 1536 MB of GDDR5 RAM set to run at 1000 MHz through a 192-bit bus. It also features 144 SPUs, 24 TAUs, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 37 Watts (35%)

Memory Bandwidth

In theory, the GeForce GT 450 (OEM) will be 52% faster than the GeForce 8800 GTS (G80) 320MB overall, because of its higher data rate. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 32640 (52%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB is a lot (more or less 30%) faster with regards to AF than the GeForce GT 450 (OEM). (explain)

GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 5664 (30%)

Pixel Rate

The GeForce GT 450 (OEM) is a lot (more or less 85%) better at anti-aliasing than the GeForce 8800 GTS (G80) 320MB, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
	Difference: 8700 (85%)

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 max amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling 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 figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.