GeForce 8800 GT 512MB vs Radeon R9 380X

Intro

Compare all that to the Radeon R9 380X, which has clock speeds of 970 MHz on the GPU, and 1425 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB		105 Watts
Radeon R9 380X		190 Watts
	Difference: 85 Watts (81%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380X will be 217% quicker than the GeForce 8800 GT 512MB overall, because of its higher bandwidth. (explain)

Radeon R9 380X		182400 MB/sec
GeForce 8800 GT 512MB		57600 MB/sec
	Difference: 124800 (217%)

Texel Rate

The Radeon R9 380X should be quite a bit (about 270%) faster with regards to anisotropic filtering than the GeForce 8800 GT 512MB. (explain)

Radeon R9 380X		124160 Mtexels/sec
GeForce 8800 GT 512MB		33600 Mtexels/sec
	Difference: 90560 (270%)

Pixel Rate

The Radeon R9 380X is quite a bit (about 223%) faster with regards to anti-aliasing than the GeForce 8800 GT 512MB, and capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 380X		31040 Mpixels/sec
GeForce 8800 GT 512MB		9600 Mpixels/sec
	Difference: 21440 (223%)

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 max amount of data (measured in MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units 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 in a second.

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