Radeon HD 7950 3GB vs Radeon R9 M265X

Intro

Compare those specs to the Radeon R9 M265X, which makes use of a 28 nm design. AMD has clocked the core speed at 575 MHz. The GDDR5 RAM is set to run at a frequency of 1125 MHz on this model. It features 640 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 7950 3GB should perform much faster than the Radeon R9 M265X in general. (explain)

Radeon HD 7950 3GB		240000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 168000 (233%)

Texel Rate

The Radeon HD 7950 3GB will be a lot (about 290%) better at AF than the Radeon R9 M265X. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 66600 (290%)

Pixel Rate

The Radeon HD 7950 3GB will be quite a bit (about 178%) more effective at full screen anti-aliasing than the Radeon R9 M265X, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 7950 3GB		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: Memory bandwidth is the max amount of data (in units of MB per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.