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Radeon HD 3850 512MB vs Radeon RX 580

Intro

The Radeon HD 3850 512MB has core clock speeds of 668 MHz on the GPU, and 828 MHz on the 512 MB of GDDR3 memory. It features 320(64x5) SPUs as well as 16 Texture Address Units and 16 ROPs.

Compare all of that to the Radeon RX 580, which makes use of a 14 nm design. AMD has clocked the core speed at 1257 MHz. The GDDR5 memory is set to run at a speed of 2000 MHz on this particular card. It features 2304 SPUs as well as 144 Texture Address Units and 32 Rasterization Operator Units.

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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

In theory, the Radeon RX 580 is 395% faster than the Radeon HD 3850 512MB overall, due to its greater bandwidth. (explain)

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

Texel Rate

The Radeon RX 580 will be much (more or less 1594%) more effective at texture filtering 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 is quite a bit (more or less 276%) more effective at anti-aliasing than the Radeon HD 3850 512MB, and also able to handle higher resolutions better. (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 data (in units of MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

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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