GeForce 8800 GT 512MB vs Radeon R9 380 2G

Intro

Compare all of that to the Radeon R9 380 2G, which makes use of a 28 nm design. AMD has clocked the core speed at 970 MHz. The GDDR5 memory runs at a frequency of 1425 MHz on this particular card. It features 1792 SPUs as well as 112 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB		105 Watts
Radeon R9 380 2G		190 Watts
	Difference: 85 Watts (81%)

Memory Bandwidth

As far as performance goes, the Radeon R9 380 2G should in theory be much better than the GeForce 8800 GT 512MB in general. (explain)

Radeon R9 380 2G		182400 MB/sec
GeForce 8800 GT 512MB		57600 MB/sec
	Difference: 124800 (217%)

Texel Rate

The Radeon R9 380 2G is quite a bit (about 223%) faster with regards to texture filtering than the GeForce 8800 GT 512MB. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
GeForce 8800 GT 512MB		33600 Mtexels/sec
	Difference: 75040 (223%)

Pixel Rate

The Radeon R9 380 2G should be a lot (approximately 223%) faster with regards to AA than the GeForce 8800 GT 512MB, and also capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 380 2G		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 (in units of megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.