GeForce 940M vs Radeon HD 4750

Intro

Compare those specs to the Radeon HD 4750, which features core clock speeds of 730 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4750 should theoretically perform much faster than the GeForce 940M overall. (explain)

Radeon HD 4750		51200 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 35200 (220%)

Texel Rate

The GeForce 940M is a small bit (about 10%) more effective at anisotropic filtering than the Radeon HD 4750. (explain)

GeForce 940M		25728 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 2368 (10%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 4750 is a better choice, by a large margin. (explain)

Radeon HD 4750		11680 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 3104 (36%)

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 (in units of MB per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If 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 are applied in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

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