GeForce 8800 GTS (G92) vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which features a core clock speed of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

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 speaking, the Radeon R9 M390X will be 158% quicker than the GeForce 8800 GTS (G92) overall, because of its greater data rate. (explain)

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

Texel Rate

The Radeon R9 M390X will be much (approximately 122%) more effective at AF 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

The Radeon R9 M390X should be a lot (about 122%) more effective at AA than the GeForce 8800 GTS (G92), and also will be able to handle higher resolutions better. (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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's bus 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 bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.