Radeon HD 7770 vs Radeon RX 480

Intro

Compare that to the Radeon RX 480, which features a GPU core clock speed of 1120 MHz, and 8192 MB of GDDR5 RAM set to run at 2000 MHz through a 256-bit bus. It also is comprised of 2304 Stream Processors, 144 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 RX 480		13349 points
Radeon HD 7770		3180 points
	Difference: 10169 (320%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon RX 480		150 Watts
	Difference: 70 Watts (88%)

Memory Bandwidth

In theory, the Radeon RX 480 should be 264% faster than the Radeon HD 7770 overall, due to its higher bandwidth. (explain)

Radeon RX 480		262144 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 190144 (264%)

Texel Rate

The Radeon RX 480 will be a lot (about 303%) better at AF than the Radeon HD 7770. (explain)

Radeon RX 480		161280 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 121280 (303%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 480 is a better choice, by a large margin. (explain)

Radeon RX 480		35840 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 19840 (124%)

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 data (in units of MB per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.