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Radeon HD 7770 vs Radeon RX 580

Intro

The Radeon HD 7770 features a clock frequency of 1000 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Compare all that to the Radeon RX 580, which uses a 14 nm design. AMD has clocked the core frequency at 1257 MHz. The GDDR5 memory runs at a speed of 2000 MHz on this particular model. It features 2304 SPUs along with 144 TAUs and 32 Rasterization Operator Units.

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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 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

Theoretically, the Radeon RX 580 should perform a lot faster than the Radeon HD 7770 overall. (explain)

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

Texel Rate

The Radeon RX 580 is a lot (about 353%) better at anisotropic 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 high levels of AA is important to you, then the Radeon RX 580 is the winner, by far. (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

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Radeon HD 7770

Amazon.com

Check prices at:

Radeon RX 580

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 7770 Radeon RX 580
Manufacturer AMD AMD
Year February 2012 April 2017
Code Name Cape Verde XT Polaris 20
Memory 1024 MB 8192 MB
Core Speed 1000 MHz 1257 MHz
Memory Speed 4500 MHz 8000 MHz
Power (Max TDP) 80 watts 185 watts
Bandwidth 72000 MB/sec 262144 MB/sec
Texel Rate 40000 Mtexels/sec 181008 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 40224 Mpixels/sec
Unified Shaders 640 2304
Texture Mapping Units 40 144
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 14 nm
Transistors 1500 million 5700 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12.0
OpenGL Version OpenGL 4.2 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video 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 most pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure 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 drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon HD 7770

Amazon.com

Check prices at:

Radeon RX 580

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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