GeForce 8800 GTX vs GeForce GTS 450 1GB

Intro

Compare all of that to the GeForce GTS 450 1GB, which comes with a clock frequency of 783 MHz and a GDDR5 memory frequency of 902 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It features 192 SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
GeForce 8800 GTX		155 Watts
	Difference: 49 Watts (46%)

Memory Bandwidth

The GeForce 8800 GTX should in theory perform quite a bit faster than the GeForce GTS 450 1GB overall. (explain)

GeForce 8800 GTX		86400 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 28672 (50%)

Texel Rate

The GeForce 8800 GTX will be quite a bit (more or less 47%) better at AF than the GeForce GTS 450 1GB. (explain)

GeForce 8800 GTX		36800 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 11744 (47%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce 8800 GTX is the winner, though only just barely. (explain)

GeForce 8800 GTX		13800 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 1272 (10%)

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 data (measured in megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.