Radeon HD 7770 vs Radeon R9 380X

Intro

Compare those specs to the Radeon R9 380X, which comes with a clock frequency of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also makes use of a 256-bit bus, and makes use of 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 7770		3180 points
	Difference: 6339 (199%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon R9 380X		190 Watts
	Difference: 110 Watts (138%)

Memory Bandwidth

As far as performance goes, the Radeon R9 380X should theoretically be much superior to the Radeon HD 7770 in general. (explain)

Radeon R9 380X		182400 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 110400 (153%)

Texel Rate

The Radeon R9 380X will be a lot (more or less 210%) better at texture filtering than the Radeon HD 7770. (explain)

Radeon R9 380X		124160 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 84160 (210%)

Pixel Rate

The Radeon R9 380X should be much (about 94%) faster with regards to AA than the Radeon HD 7770, and capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 380X		31040 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 15040 (94%)

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 max amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out 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 outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.