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Radeon HD 4770 vs Radeon R9 280X

Intro

The Radeon HD 4770 comes with a clock frequency of 750 MHz and a GDDR5 memory speed of 800 MHz. It also makes use of a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

Compare all that to the Radeon R9 280X, which makes use of a 28 nm design. AMD has clocked the core speed at 850 MHz. The GDDR5 memory is set to run at a frequency of 1500 MHz on this particular card. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770 80 Watts
Radeon R9 280X 250 Watts
Difference: 170 Watts (213%)

Memory Bandwidth

Theoretically, the Radeon R9 280X should be a lot faster than the Radeon HD 4770 overall. (explain)

Radeon R9 280X 288000 MB/sec
Radeon HD 4770 51200 MB/sec
Difference: 236800 (463%)

Texel Rate

The Radeon R9 280X will be much (more or less 353%) better at AF than the Radeon HD 4770. (explain)

Radeon R9 280X 108800 Mtexels/sec
Radeon HD 4770 24000 Mtexels/sec
Difference: 84800 (353%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 280X is the winner, by far. (explain)

Radeon R9 280X 27200 Mpixels/sec
Radeon HD 4770 12000 Mpixels/sec
Difference: 15200 (127%)

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 4770

Amazon.com

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Radeon R9 280X

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 4770 Radeon R9 280X
Manufacturer AMD AMD
Year Apr 28, 2009 October 2013
Code Name RV740 Tahiti XTL
Memory 512 MB 3072 MB
Core Speed 750 MHz 850 MHz
Memory Speed 3200 MHz 6000 MHz
Power (Max TDP) 80 watts 250 watts
Bandwidth 51200 MB/sec 288000 MB/sec
Texel Rate 24000 Mtexels/sec 108800 Mtexels/sec
Pixel Rate 12000 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 640(128x5) 2048
Texture Mapping Units 32 128
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 384-bit
Fab Process 40 nm 28 nm
Transistors 826 million 4313 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 texture map elements (texels) that can be applied per second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 4770

Amazon.com

Check prices at:

Radeon R9 280X

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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