GeForce 940M vs Radeon HD 5570

Intro

Compare those specs to the Radeon HD 5570, which comes with a core clock frequency of 650 MHz and a DDR3 memory speed of 900 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 400(80x5) SPUs, 20 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 5570 should in theory perform a lot faster than the GeForce 940M in general. (explain)

Radeon HD 5570		28800 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 12800 (80%)

Texel Rate

The GeForce 940M will be quite a bit (more or less 98%) more effective at AF than the Radeon HD 5570. (explain)

GeForce 940M		25728 Mtexels/sec
Radeon HD 5570		13000 Mtexels/sec
	Difference: 12728 (98%)

Pixel Rate

The GeForce 940M is a lot (more or less 65%) better at anti-aliasing than the Radeon HD 5570, and capable of handling higher screen resolutions better. (explain)

GeForce 940M		8576 Mpixels/sec
Radeon HD 5570		5200 Mpixels/sec
	Difference: 3376 (65%)

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 megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the 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 clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant 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.