Radeon HD 5870 vs Radeon R9 M380

Intro

Compare those specs to the Radeon R9 M380, which has a clock frequency of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 5870 is 60% quicker than the Radeon R9 M380 in general, due to its higher bandwidth. (explain)

Radeon HD 5870		153600 MB/sec
Radeon R9 M380		96000 MB/sec
	Difference: 57600 (60%)

Texel Rate

The Radeon HD 5870 should be much (more or less 70%) better at anisotropic filtering than the Radeon R9 M380. (explain)

Radeon HD 5870		68000 Mtexels/sec
Radeon R9 M380		40000 Mtexels/sec
	Difference: 28000 (70%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 5870 is a better choice, by a large margin. (explain)

Radeon HD 5870		27200 Mpixels/sec
Radeon R9 M380		16000 Mpixels/sec
	Difference: 11200 (70%)

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 max amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's bus 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 ANOTHER 2x. The higher the bandwidth is, 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 applied in one second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs 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 rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.