Radeon HD 7970 vs Radeon R9 380X

Intro

Compare all of that to the Radeon R9 380X, which has a core clock frequency of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It is made up of 2048 SPUs, 128 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 380X		9519 points
Radeon HD 7970		8225 points
	Difference: 1294 (16%)

Ethereum Mining Hash Rate

Radeon HD 7970		21 Mh/s
Radeon R9 380X		19 Mh/s
	Difference: 2 (11%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380X		190 Watts
Radeon HD 7970		250 Watts
	Difference: 60 Watts (32%)

Memory Bandwidth

Performance-wise, the Radeon HD 7970 should in theory be quite a bit better than the Radeon R9 380X in general. (explain)

Radeon HD 7970		264000 MB/sec
Radeon R9 380X		182400 MB/sec
	Difference: 81600 (45%)

Texel Rate

The Radeon R9 380X will be just a bit (approximately 5%) better at anisotropic filtering than the Radeon HD 7970. (explain)

Radeon R9 380X		124160 Mtexels/sec
Radeon HD 7970		118400 Mtexels/sec
	Difference: 5760 (5%)

Pixel Rate

The Radeon R9 380X will be a small bit (approximately 5%) better at anti-aliasing than the Radeon HD 7970, and also will be capable of handling higher resolutions better. (explain)

Radeon R9 380X		31040 Mpixels/sec
Radeon HD 7970		29600 Mpixels/sec
	Difference: 1440 (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 largest amount of data (measured in MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is worked out 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 video 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 maximum number of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.