Radeon HD 7850 vs Radeon R9 M385X

Intro

Compare those specifications to the Radeon R9 M385X, which makes use of a 28 nm design. AMD has clocked the core speed at 1100 MHz. The GDDR5 memory works at a speed of 1500 MHz on this model. It features 896 SPUs along with 56 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 7850 should in theory be a lot superior to the Radeon R9 M385X in general. (explain)

Radeon HD 7850		153600 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 57600 (60%)

Texel Rate

The Radeon R9 M385X should be a bit (about 12%) more effective at AF than the Radeon HD 7850. (explain)

Radeon R9 M385X		61600 Mtexels/sec
Radeon HD 7850		55040 Mtexels/sec
	Difference: 6560 (12%)

Pixel Rate

The Radeon HD 7850 will be quite a bit (about 56%) faster with regards to anti-aliasing than the Radeon R9 M385X, and also should be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 7850		27520 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 9920 (56%)

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. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

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