GeForce 820M vs Radeon R9 280X

Intro

Compare that to the Radeon R9 280X, which has a core clock speed of 850 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 384-bit bus, and makes use of a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

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 R9 280X		8886 points
GeForce 820M		850 points
	Difference: 8036 (945%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Radeon R9 280X		250 Watts
	Difference: 235 Watts (1567%)

Memory Bandwidth

The Radeon R9 280X should theoretically perform quite a bit faster than the GeForce 820M in general. (explain)

Radeon R9 280X		288000 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 272000 (1700%)

Texel Rate

The Radeon R9 280X will be much (about 846%) faster with regards to texture filtering than the GeForce 820M. (explain)

Radeon R9 280X		108800 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 97296 (846%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 280X is a better choice, and very much so. (explain)

Radeon R9 280X		27200 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 24324 (846%)

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 maximum amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total texture units of the card by the core 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also 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 - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.