GeForce 8800 GTS (G80) 320MB vs Radeon R9 390X 8G

Intro

Compare those specs to the Radeon R9 390X 8G, which uses a 28 nm design. AMD has clocked the core speed at 1050 MHz. The GDDR5 memory works at a frequency of 1500 MHz on this particular card. It features 2816 SPUs as well as 176 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 320MB		143 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 132 Watts (92%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G should perform much faster than the GeForce 8800 GTS (G80) 320MB in general. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 320640 (506%)

Texel Rate

The Radeon R9 390X 8G should be quite a bit (more or less 650%) faster with regards to AF than the GeForce 8800 GTS (G80) 320MB. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
	Difference: 160176 (650%)

Pixel Rate

The Radeon R9 390X 8G should be much (approximately 555%) faster with regards to anti-aliasing than the GeForce 8800 GTS (G80) 320MB, and able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
	Difference: 56940 (555%)

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 maximum amount of data (in units of MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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