GeForce GTX 870M vs Radeon R9 270

Intro

Compare all of that to the Radeon R9 270, which comes with GPU core speed of 900 MHz, and 2048 MB of GDDR5 memory set to run at 1400 MHz through a 256-bit bus. It also features 1280 Stream Processors, 80 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 270		5943 points
GeForce GTX 870M		4770 points
	Difference: 1173 (25%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
Radeon R9 270		150 Watts
	Difference: 40 Watts (36%)

Memory Bandwidth

In theory, the Radeon R9 270 should perform much faster than the GeForce GTX 870M in general. (explain)

Radeon R9 270		179200 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 83200 (87%)

Texel Rate

The GeForce GTX 870M is much (approximately 46%) better at texture filtering than the Radeon R9 270. (explain)

GeForce GTX 870M		105392 Mtexels/sec
Radeon R9 270		72000 Mtexels/sec
	Difference: 33392 (46%)

Pixel Rate

The Radeon R9 270 should be much (approximately 28%) better at AA than the GeForce GTX 870M, and will be capable of handling higher screen resolutions better. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce GTX 870M		22584 Mpixels/sec
	Difference: 6216 (28%)

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 information (in units of megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.