GeForce 820M vs Radeon R9 295X2

Intro

Compare all that to the Radeon R9 295X2, which features a core clock frequency of 1018 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 512-bit bus, and makes use of a 28 nm design. It features 2816 SPUs, 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

In theory, the Radeon R9 295X2 should perform quite a bit faster 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 quite a bit (about 3015%) better at texture filtering than the GeForce 820M. (explain)

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

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 295X2 is superior to the GeForce 820M, and very much so. (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: Bandwidth is the max amount of information (measured in MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends 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.