GeForce 940M vs Radeon HD 3850 512MB

Intro

Compare that to the Radeon HD 3850 512MB, which has a GPU core clock speed of 668 MHz, and 512 MB of GDDR3 memory set to run at 828 MHz through a 256-bit bus. It also is comprised of 320(64x5) Stream Processors, 16 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 3850 512MB, in theory, should be much faster than the GeForce 940M overall. (explain)

Radeon HD 3850 512MB		52992 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 36992 (231%)

Texel Rate

The GeForce 940M will be much (about 141%) more effective at AF than the Radeon HD 3850 512MB. (explain)

GeForce 940M		25728 Mtexels/sec
Radeon HD 3850 512MB		10688 Mtexels/sec
	Difference: 15040 (141%)

Pixel Rate

The Radeon HD 3850 512MB is quite a bit (more or less 25%) faster with regards to FSAA than the GeForce 940M, and should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 3850 512MB		10688 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 2112 (25%)

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 largest amount of information (in units of MB per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs 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 also depends on many 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.