GeForce 825M vs Radeon R9 M385X

Intro

Compare those specifications to the Radeon R9 M385X, which features core clock speeds of 1100 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 memory. It features 896 SPUs along with 56 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R9 M385X should in theory be much superior to the GeForce 825M in general. (explain)

Radeon R9 M385X		96000 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 81600 (567%)

Texel Rate

The Radeon R9 M385X should be quite a bit (about 353%) faster with regards to texture filtering than the GeForce 825M. (explain)

Radeon R9 M385X		61600 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 48000 (353%)

Pixel Rate

The Radeon R9 M385X should be much (about 159%) better at full screen anti-aliasing than the GeForce 825M, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 M385X		17600 Mpixels/sec
GeForce 825M		6800 Mpixels/sec
	Difference: 10800 (159%)

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 maximum amount of data (counted in MB per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 is worked out by multiplying the total texture units by the core 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.