Radeon HD 7850 vs Radeon R9 270

Intro

Compare all of that to the Radeon R9 270, which uses a 28 nm design. AMD has clocked the core frequency at 900 MHz. The GDDR5 RAM is set to run at a frequency of 1400 MHz on this specific model. 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
Radeon HD 7850		5200 points
	Difference: 743 (14%)

Ethereum Mining Hash Rate

Radeon R9 270		15 Mh/s
Radeon HD 7850		13 Mh/s
	Difference: 2 (15%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850		130 Watts
Radeon R9 270		150 Watts
	Difference: 20 Watts (15%)

Memory Bandwidth

In theory, the Radeon R9 270 should be 17% quicker than the Radeon HD 7850 in general, due to its greater bandwidth. (explain)

Radeon R9 270		179200 MB/sec
Radeon HD 7850		153600 MB/sec
	Difference: 25600 (17%)

Texel Rate

The Radeon R9 270 should be much (about 31%) better at texture filtering than the Radeon HD 7850. (explain)

Radeon R9 270		72000 Mtexels/sec
Radeon HD 7850		55040 Mtexels/sec
	Difference: 16960 (31%)

Pixel Rate

The Radeon R9 270 should be just a bit (about 5%) more effective at full screen anti-aliasing than the Radeon HD 7850, and also should be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 270		28800 Mpixels/sec
Radeon HD 7850		27520 Mpixels/sec
	Difference: 1280 (5%)

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: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics 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 maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.