Radeon R9 270 vs Radeon R9 380 4G

Intro

Compare all of that to the Radeon R9 380 4G, which comes with a clock frequency of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It features 1792 SPUs, 112 Texture Address Units, 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 380 4G		8837 points
Radeon R9 270		5943 points
	Difference: 2894 (49%)

Ethereum Mining Hash Rate

Radeon R9 380 4G		21 Mh/s
Radeon R9 270		15 Mh/s
	Difference: 6 (40%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270		150 Watts
Radeon R9 380 4G		190 Watts
	Difference: 40 Watts (27%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 4G is 2% quicker than the Radeon R9 270 overall, because of its greater bandwidth. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon R9 270		179200 MB/sec
	Difference: 3200 (2%)

Texel Rate

The Radeon R9 380 4G should be a lot (more or less 51%) better at AF than the Radeon R9 270. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon R9 270		72000 Mtexels/sec
	Difference: 36640 (51%)

Pixel Rate

The Radeon R9 380 4G will be a bit (more or less 8%) more effective at full screen anti-aliasing than the Radeon R9 270, and also able to handle higher resolutions while still performing well. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
Radeon R9 270		28800 Mpixels/sec
	Difference: 2240 (8%)

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 largest amount of information (in units of megabytes per second) that can be transferred across the external memory interface in a second. It's calculated 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 DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to 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 potential to get to the maximum fill rate.