GeForce 8800 GS vs Radeon R9 M390X

Intro

Compare all that to the Radeon R9 M390X, which comes with a GPU core clock speed of 723 MHz, and 4096 MB of GDDR5 RAM running at 1250 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

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

Theoretically speaking, the Radeon R9 M390X should perform quite a bit faster than the GeForce 8800 GS overall. (explain)

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

Texel Rate

The Radeon R9 M390X will be much (approximately 251%) better at texture filtering 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 a lot (more or less 251%) better at AA than the GeForce 8800 GS, and will be able to handle higher screen 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: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also 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 - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.