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Radeon HD 3850 512MB vs Radeon RX 580

Intro

The Radeon HD 3850 512MB uses a 55 nm design. AMD has clocked the core speed at 668 MHz. The GDDR3 RAM is set to run at a frequency of 828 MHz on this particular model. It features 320(64x5) SPUs along with 16 Texture Address Units and 16 Rasterization Operator Units.

Compare all that to the Radeon RX 580, which makes use of a 14 nm design. AMD has clocked the core frequency at 1257 MHz. The GDDR5 RAM runs at a speed of 2000 MHz on this particular model. It features 2304 SPUs along with 144 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3850 512MB 75 Watts
Radeon RX 580 185 Watts
Difference: 110 Watts (147%)

Memory Bandwidth

The Radeon RX 580, in theory, should be a lot faster than the Radeon HD 3850 512MB overall. (explain)

Radeon RX 580 262144 MB/sec
Radeon HD 3850 512MB 52992 MB/sec
Difference: 209152 (395%)

Texel Rate

The Radeon RX 580 is a lot (approximately 1594%) more effective at AF than the Radeon HD 3850 512MB. (explain)

Radeon RX 580 181008 Mtexels/sec
Radeon HD 3850 512MB 10688 Mtexels/sec
Difference: 170320 (1594%)

Pixel Rate

The Radeon RX 580 will be much (about 276%) better at anti-aliasing than the Radeon HD 3850 512MB, and able to handle higher resolutions more effectively. (explain)

Radeon RX 580 40224 Mpixels/sec
Radeon HD 3850 512MB 10688 Mpixels/sec
Difference: 29536 (276%)

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 3850 512MB

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 3850 512MB Radeon RX 580
Manufacturer AMD AMD
Year Nov 19, 2007 April 2017
Code Name RV670 PRO Polaris 20
Memory 512 MB 8192 MB
Core Speed 668 MHz 1257 MHz
Memory Speed 1656 MHz 8000 MHz
Power (Max TDP) 75 watts 185 watts
Bandwidth 52992 MB/sec 262144 MB/sec
Texel Rate 10688 Mtexels/sec 181008 Mtexels/sec
Pixel Rate 10688 Mpixels/sec 40224 Mpixels/sec
Unified Shaders 320(64x5) 2304
Texture Mapping Units 16 144
Render Output Units 16 32
Bus Type GDDR3 GDDR5
Bus Width 256-bit 256-bit
Fab Process 55 nm 14 nm
Transistors (Unknown) million 5700 million
Bus PCIe 2.0 x16/AGP 8x PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 12.0
OpenGL Version OpenGL 3.0 OpenGL 4.5

Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - 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 3850 512MB

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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