GeForce 8800 GTS (G80) 640MB vs Radeon R9 380 2G

Intro

Compare those specs to the Radeon R9 380 2G, which has core clock speeds of 970 MHz on the GPU, and 1425 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs along with 112 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 640MB		143 Watts
Radeon R9 380 2G		190 Watts
	Difference: 47 Watts (33%)

Memory Bandwidth

The Radeon R9 380 2G should theoretically be quite a bit faster than the GeForce 8800 GTS (G80) 640MB in general. (explain)

Radeon R9 380 2G		182400 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 119040 (188%)

Texel Rate

The Radeon R9 380 2G will be a lot (approximately 341%) more effective at texture filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 84016 (341%)

Pixel Rate

The Radeon R9 380 2G is a lot (about 203%) better at AA than the GeForce 8800 GTS (G80) 640MB, and also will be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 20780 (203%)

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 (in units of megabytes per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core 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 also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.