Radeon HD 7950 vs Radeon R9 M265X

Intro

Compare all that to the Radeon R9 M265X, which features core speeds of 575 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 will be 233% quicker than the Radeon R9 M265X in general, because of its higher bandwidth. (explain)

Radeon HD 7950		240000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 168000 (233%)

Texel Rate

The Radeon HD 7950 will be a lot (approximately 290%) faster with regards to anisotropic filtering than the Radeon R9 M265X. (explain)

Radeon HD 7950		89600 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 66600 (290%)

Pixel Rate

The Radeon HD 7950 will be much (about 178%) more effective at AA than the Radeon R9 M265X, and should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 7950		25600 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 16400 (178%)

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 (measured in MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If 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 number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. 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 also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.