GeForce 8800 GS vs Radeon R9 M390X

Intro

Compare those specifications to the Radeon R9 M390X, which features a GPU core clock speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also is made up of 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GS		105 Watts
Radeon R9 M390X		125 Watts
	Difference: 20 Watts (19%)

Memory Bandwidth

In theory, the Radeon R9 M390X will be 317% quicker than the GeForce 8800 GS in general, because of its greater bandwidth. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce 8800 GS		38400 MB/sec
	Difference: 121600 (317%)

Texel Rate

The Radeon R9 M390X is quite a bit (about 251%) more effective at AF than the GeForce 8800 GS. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce 8800 GS		26400 Mtexels/sec
	Difference: 66144 (251%)

Pixel Rate

The Radeon R9 M390X will be quite a bit (approximately 251%) better at FSAA than the GeForce 8800 GS, and also capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce 8800 GS		6600 Mpixels/sec
	Difference: 16536 (251%)

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 max amount of data (in units of megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.