Radeon HD 7770 vs Radeon RX 580

Intro

Compare that to the Radeon RX 580, which has GPU core speed of 1257 MHz, and 8192 MB of GDDR5 memory running at 2000 MHz through a 256-bit bus. It also features 2304 SPUs, 144 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

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 580		13630 points
Radeon HD 7770		3180 points
	Difference: 10450 (329%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon RX 580		185 Watts
	Difference: 105 Watts (131%)

Memory Bandwidth

In theory, the Radeon RX 580 should be 264% faster than the Radeon HD 7770 overall, because of its higher data rate. (explain)

Radeon RX 580		262144 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 190144 (264%)

Texel Rate

The Radeon RX 580 should be quite a bit (approximately 353%) faster with regards to texture filtering than the Radeon HD 7770. (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 141008 (353%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 580 is the winner, by a large margin. (explain)

Radeon RX 580		40224 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 24224 (151%)

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 max amount of data (in units of megabytes per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 are applied per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.