GeForce 8800 Ultra vs Radeon R9 M385X

Intro

Compare that to the Radeon R9 M385X, which comes with GPU core speed of 1100 MHz, and 4096 MB of GDDR5 memory set to run at 1500 MHz through a 128-bit bus. It also is made up of 896 SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce 8800 Ultra should be a small bit faster than the Radeon R9 M385X in general. (explain)

GeForce 8800 Ultra		103680 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 7680 (8%)

Texel Rate

The Radeon R9 M385X will be much (approximately 57%) faster with regards to anisotropic filtering than the GeForce 8800 Ultra. (explain)

Radeon R9 M385X		61600 Mtexels/sec
GeForce 8800 Ultra		39168 Mtexels/sec
	Difference: 22432 (57%)

Pixel Rate

The Radeon R9 M385X will be a little bit (approximately 20%) faster with regards to full screen anti-aliasing than the GeForce 8800 Ultra, and also capable of handling higher resolutions while still performing well. (explain)

Radeon R9 M385X		17600 Mpixels/sec
GeForce 8800 Ultra		14688 Mpixels/sec
	Difference: 2912 (20%)

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 largest amount of information (in units of MB per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.