GeForce 820M vs Radeon R9 295X2

Intro

Compare those specifications to the Radeon R9 295X2, which makes use of a 28 nm design. AMD has clocked the core speed at 1018 MHz. The GDDR5 RAM runs at a speed of 1250 MHz on this particular card. It features 2816 SPUs along with 176 Texture Address Units and 64 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 295X2		21205 points
GeForce 820M		850 points
	Difference: 20355 (2395%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Radeon R9 295X2		500 Watts
	Difference: 485 Watts (3233%)

Memory Bandwidth

As far as performance goes, the Radeon R9 295X2 should in theory be quite a bit better than the GeForce 820M in general. (explain)

Radeon R9 295X2		640000 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 624000 (3900%)

Texel Rate

The Radeon R9 295X2 should be much (approximately 3015%) faster with regards to texture filtering than the GeForce 820M. (explain)

Radeon R9 295X2		358336 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 346832 (3015%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 295X2 is the winner, by far. (explain)

Radeon R9 295X2		130304 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 127428 (4431%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs 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 also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.