Radeon HD 3850 256MB vs Radeon R9 M365X

Intro

Compare all that to the Radeon R9 M365X, which comes with a clock speed of 925 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M365X, in theory, should perform much faster than the Radeon HD 3850 256MB overall. (explain)

Radeon R9 M365X		72000 MB/sec
Radeon HD 3850 256MB		52992 MB/sec
	Difference: 19008 (36%)

Texel Rate

The Radeon R9 M365X is quite a bit (about 246%) more effective at texture filtering than the Radeon HD 3850 256MB. (explain)

Radeon R9 M365X		37000 Mtexels/sec
Radeon HD 3850 256MB		10688 Mtexels/sec
	Difference: 26312 (246%)

Pixel Rate

The Radeon R9 M365X should be quite a bit (about 38%) more effective at anti-aliasing than the Radeon HD 3850 256MB, and should be able to handle higher resolutions more effectively. (explain)

Radeon R9 M365X		14800 Mpixels/sec
Radeon HD 3850 256MB		10688 Mpixels/sec
	Difference: 4112 (38%)

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 largest amount of information (counted in megabytes per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.