Radeon HD 7870 vs Radeon R9 270

Intro

Compare those specifications to the Radeon R9 270, which features a clock speed of 900 MHz and a GDDR5 memory speed of 1400 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It features 1280 SPUs, 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 HD 7870		6230 points
Radeon R9 270		5943 points
	Difference: 287 (5%)

Ethereum Mining Hash Rate

Radeon HD 7870		16 Mh/s
Radeon R9 270		15 Mh/s
	Difference: 1 (7%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270		150 Watts
Radeon HD 7870		175 Watts
	Difference: 25 Watts (17%)

Memory Bandwidth

As far as performance goes, the Radeon R9 270 should in theory be just a bit better than the Radeon HD 7870 overall. (explain)

Radeon R9 270		179200 MB/sec
Radeon HD 7870		153600 MB/sec
	Difference: 25600 (17%)

Texel Rate

The Radeon HD 7870 should be a small bit (more or less 11%) more effective at anisotropic filtering than the Radeon R9 270. (explain)

Radeon HD 7870		80000 Mtexels/sec
Radeon R9 270		72000 Mtexels/sec
	Difference: 8000 (11%)

Pixel Rate

The Radeon HD 7870 should be a little bit (approximately 11%) faster with regards to anti-aliasing than the Radeon R9 270, and also will be able to handle higher resolutions more effectively. (explain)

Radeon HD 7870		32000 Mpixels/sec
Radeon R9 270		28800 Mpixels/sec
	Difference: 3200 (11%)

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 (measured in MB per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it should 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 AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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 of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.