GeForce 8800 GTS (G92) vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which features core clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce 8800 GTS (G92)		135 Watts
	Difference: 10 Watts (8%)

Memory Bandwidth

Theoretically, the Radeon R9 M390X should be quite a bit faster than the GeForce 8800 GTS (G92) overall. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce 8800 GTS (G92)		62080 MB/sec
	Difference: 97920 (158%)

Texel Rate

The Radeon R9 M390X should be much (approximately 122%) faster with regards to anisotropic filtering than the GeForce 8800 GTS (G92). (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce 8800 GTS (G92)		41600 Mtexels/sec
	Difference: 50944 (122%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M390X is a better choice, and very much so. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce 8800 GTS (G92)		10400 Mpixels/sec
	Difference: 12736 (122%)

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 (counted in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 are applied in one second. This number 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units 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 fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.