GeForce 840M vs Radeon RX 480 4GB

Intro

Compare those specifications to the Radeon RX 480 4GB, which makes use of a 14 nm design. AMD has set the core frequency at 1120 MHz. The GDDR5 memory is set to run at a speed of 1750 MHz on this specific model. It features 2304 SPUs as well as 144 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 840M		30 Watts
Radeon RX 480 4GB		150 Watts
	Difference: 120 Watts (400%)

Memory Bandwidth

Performance-wise, the Radeon RX 480 4GB should in theory be quite a bit superior to the GeForce 840M in general. (explain)

Radeon RX 480 4GB		229376 MB/sec
GeForce 840M		16000 MB/sec
	Difference: 213376 (1334%)

Texel Rate

The Radeon RX 480 4GB should be a lot (more or less 553%) better at texture filtering than the GeForce 840M. (explain)

Radeon RX 480 4GB		161280 Mtexels/sec
GeForce 840M		24696 Mtexels/sec
	Difference: 136584 (553%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 480 4GB is the winner, by far. (explain)

Radeon RX 480 4GB		35840 Mpixels/sec
GeForce 840M		8232 Mpixels/sec
	Difference: 27608 (335%)

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 data (counted in megabytes per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 is calculated 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 number of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.