Radeon HD 5870 vs Radeon R9 M265X

Intro

Compare all of 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 RAM. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 5870, in theory, should be much faster than the Radeon R9 M265X in general. (explain)

Radeon HD 5870		153600 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 81600 (113%)

Texel Rate

The Radeon HD 5870 should be a lot (about 196%) faster with regards to AF than the Radeon R9 M265X. (explain)

Radeon HD 5870		68000 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 45000 (196%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 5870 is superior to the Radeon R9 M265X, by a large margin. (explain)

Radeon HD 5870		27200 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 18000 (196%)

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 maximum amount of information (in units of megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that can be processed in one second. This number 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.