GeForce 820M vs Radeon R9 270

Intro

Compare all that to the Radeon R9 270, which has core speeds of 900 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs as well as 80 TAUs and 32 ROPs.

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 R9 270		5943 points
GeForce 820M		850 points
	Difference: 5093 (599%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Radeon R9 270		150 Watts
	Difference: 135 Watts (900%)

Memory Bandwidth

The Radeon R9 270 should in theory be quite a bit faster than the GeForce 820M overall. (explain)

Radeon R9 270		179200 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 163200 (1020%)

Texel Rate

The Radeon R9 270 is a lot (more or less 526%) faster with regards to texture filtering than the GeForce 820M. (explain)

Radeon R9 270		72000 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 60496 (526%)

Pixel Rate

The Radeon R9 270 should be a lot (approximately 901%) more effective at FSAA than the GeForce 820M, and also able to handle higher resolutions while still performing well. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 25924 (901%)

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 within a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the 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 processed per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.