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Radeon HD 7770 vs Radeon RX 590

Intro

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

Compare all that to the Radeon RX 590, which comes with GPU clock speed of 1469 MHz, and 8192 MB of GDDR5 RAM running at 2000 MHz through a 256-bit bus. It also features 2304 Stream Processors, 144 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770 80 Watts
Radeon RX 590 175 Watts
Difference: 95 Watts (119%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 590 should perform much faster than the Radeon HD 7770 overall. (explain)

Radeon RX 590 262144 MB/sec
Radeon HD 7770 72000 MB/sec
Difference: 190144 (264%)

Texel Rate

The Radeon RX 590 is a lot (about 429%) faster with regards to AF than the Radeon HD 7770. (explain)

Radeon RX 590 211536 Mtexels/sec
Radeon HD 7770 40000 Mtexels/sec
Difference: 171536 (429%)

Pixel Rate

The Radeon RX 590 will be a lot (about 194%) more effective at full screen anti-aliasing than the Radeon HD 7770, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon RX 590 47008 Mpixels/sec
Radeon HD 7770 16000 Mpixels/sec
Difference: 31008 (194%)

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

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Radeon RX 590

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 590
Manufacturer AMD AMD
Year February 2012 November 2018
Code Name Cape Verde XT Polaris 30
Memory 1024 MB 8192 MB
Core Speed 1000 MHz 1469 MHz
Memory Speed 4500 MHz 8000 MHz
Power (Max TDP) 80 watts 175 watts
Bandwidth 72000 MB/sec 262144 MB/sec
Texel Rate 40000 Mtexels/sec 211536 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 47008 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 12 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: Bandwidth is the largest amount of information (counted in MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 7770

Amazon.com

Check prices at:

Radeon RX 590

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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