GeForce 940M vs Radeon HD 4670 1GB

Intro

Compare all that to the Radeon HD 4670 1GB, which features a core clock speed of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory frequency of 1100 MHz. It also features a 128-bit memory bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 32 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4670 1GB, in theory, should perform much faster than the GeForce 940M overall. (explain)

Radeon HD 4670 1GB		35200 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 19200 (120%)

Texel Rate

The GeForce 940M should be just a bit (approximately 7%) faster with regards to anisotropic filtering than the Radeon HD 4670 1GB. (explain)

GeForce 940M		25728 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 1728 (7%)

Pixel Rate

The GeForce 940M will be a lot (more or less 43%) faster with regards to FSAA than the Radeon HD 4670 1GB, and also should be able to handle higher resolutions without slowing down too much. (explain)

GeForce 940M		8576 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 2576 (43%)

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 maximum amount of data (measured in megabytes per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 amount of texture map elements (texels) that are applied in one second. This 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 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 card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.