GeForce 8800 GS vs Radeon R9 390X 8G

Intro

Compare all that to the Radeon R9 390X 8G, which has a GPU core clock speed of 1050 MHz, and 8192 MB of GDDR5 memory running at 1500 MHz through a 512-bit bus. It also is comprised of 2816 Stream Processors, 176 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GS		105 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 170 Watts (162%)

Memory Bandwidth

In theory, the Radeon R9 390X 8G will be 900% quicker than the GeForce 8800 GS overall, due to its higher bandwidth. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce 8800 GS		38400 MB/sec
	Difference: 345600 (900%)

Texel Rate

The Radeon R9 390X 8G is a lot (approximately 600%) better at AF than the GeForce 8800 GS. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce 8800 GS		26400 Mtexels/sec
	Difference: 158400 (600%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 390X 8G is superior to the GeForce 8800 GS, and very much so. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce 8800 GS		6600 Mpixels/sec
	Difference: 60600 (918%)

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 across the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total amount of texture units 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.