Radeon HD 5870 vs Radeon R9 M365X

Intro

Compare all of that to the Radeon R9 M365X, which features a core clock frequency of 925 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 5870 should be 113% faster than the Radeon R9 M365X in general, due to its greater bandwidth. (explain)

Radeon HD 5870		153600 MB/sec
Radeon R9 M365X		72000 MB/sec
	Difference: 81600 (113%)

Texel Rate

The Radeon HD 5870 will be much (more or less 84%) faster with regards to anisotropic filtering than the Radeon R9 M365X. (explain)

Radeon HD 5870		68000 Mtexels/sec
Radeon R9 M365X		37000 Mtexels/sec
	Difference: 31000 (84%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 5870 is superior to the Radeon R9 M365X, by a large margin. (explain)

Radeon HD 5870		27200 Mpixels/sec
Radeon R9 M365X		14800 Mpixels/sec
	Difference: 12400 (84%)

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 data (in units of megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock 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 processed in one second.

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