Radeon HD 3690/3830 vs Radeon R9 M265X

Intro

Compare those specifications to the Radeon R9 M265X, which comes with core speeds of 575 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

Memory Bandwidth

Performance-wise, the Radeon R9 M265X should in theory be much better than the Radeon HD 3690/3830 overall. (explain)

Radeon R9 M265X		72000 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 45504 (172%)

Texel Rate

The Radeon R9 M265X will be quite a bit (more or less 115%) better at texture filtering than the Radeon HD 3690/3830. (explain)

Radeon R9 M265X		23000 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 12312 (115%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 3690/3830 is a better choice, though not by far. (explain)

Radeon HD 3690/3830		10688 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 1488 (16%)

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 information (counted in megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate 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 outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.