GeForce 940M vs Radeon HD 7870

Intro

Compare those specifications to the Radeon HD 7870, which has clock speeds of 1000 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs as well as 80 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7870		6230 points
GeForce 940M		1740 points
	Difference: 4490 (258%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 7870 should theoretically be quite a bit faster than the GeForce 940M overall. (explain)

Radeon HD 7870		153600 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 137600 (860%)

Texel Rate

The Radeon HD 7870 is much (approximately 211%) better at texture filtering than the GeForce 940M. (explain)

Radeon HD 7870		80000 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 54272 (211%)

Pixel Rate

The Radeon HD 7870 should be much (approximately 273%) better at FSAA than the GeForce 940M, and will be capable of handling higher resolutions more effectively. (explain)

Radeon HD 7870		32000 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 23424 (273%)

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 max amount of information (in units of megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video 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 graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.