GeForce 8800 Ultra vs Radeon R9 M270X

Intro

Compare those specifications to the Radeon R9 M270X, which comes with a core clock frequency of 725 MHz and a GDDR5 memory frequency of 1125 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It features 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 8800 Ultra, in theory, should be much faster than the Radeon R9 M270X overall. (explain)

GeForce 8800 Ultra		103680 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 31680 (44%)

Texel Rate

The GeForce 8800 Ultra should be much (approximately 35%) faster with regards to AF than the Radeon R9 M270X. (explain)

GeForce 8800 Ultra		39168 Mtexels/sec
Radeon R9 M270X		29000 Mtexels/sec
	Difference: 10168 (35%)

Pixel Rate

The GeForce 8800 Ultra should be a lot (more or less 27%) faster with regards to FSAA than the Radeon R9 M270X, and will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce 8800 Ultra		14688 Mpixels/sec
Radeon R9 M270X		11600 Mpixels/sec
	Difference: 3088 (27%)

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 largest amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's interface 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 bandwidth is, 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 amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video 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 the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount 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 output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.