GeForce 8800 GT 256MB vs Radeon R9 M380

Intro

Compare that to the Radeon R9 M380, which has a core clock frequency of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R9 M380 should perform much faster than the GeForce 8800 GT 256MB overall. (explain)

Radeon R9 M380		96000 MB/sec
GeForce 8800 GT 256MB		44800 MB/sec
	Difference: 51200 (114%)

Texel Rate

The Radeon R9 M380 should be a little bit (about 19%) better at anisotropic filtering than the GeForce 8800 GT 256MB. (explain)

Radeon R9 M380		40000 Mtexels/sec
GeForce 8800 GT 256MB		33600 Mtexels/sec
	Difference: 6400 (19%)

Pixel Rate

The Radeon R9 M380 should be a lot (more or less 67%) faster with regards to anti-aliasing than the GeForce 8800 GT 256MB, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 M380		16000 Mpixels/sec
GeForce 8800 GT 256MB		9600 Mpixels/sec
	Difference: 6400 (67%)

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 information (in units of megabytes per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes 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, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.