GeForce 8800 Ultra vs Radeon R9 M275X

Intro

Compare all that to the Radeon R9 M275X, which has core speeds of 900 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
GeForce 8800 Ultra		171 Watts
	Difference: 121 Watts (242%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 Ultra should perform a lot faster than the Radeon R9 M275X overall. (explain)

GeForce 8800 Ultra		103680 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 31680 (44%)

Texel Rate

The GeForce 8800 Ultra should be just a bit (approximately 9%) faster with regards to texture filtering than the Radeon R9 M275X. (explain)

GeForce 8800 Ultra		39168 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 3168 (9%)

Pixel Rate

The GeForce 8800 Ultra should be a small bit (about 2%) more effective at FSAA than the Radeon R9 M275X, and should be able to handle higher resolutions more effectively. (explain)

GeForce 8800 Ultra		14688 Mpixels/sec
Radeon R9 M275X		14400 Mpixels/sec
	Difference: 288 (2%)

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 data (counted in MB per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.