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Radeon HD 3850 512MB vs Radeon RX 580

Intro

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

Compare those specifications to the Radeon RX 580, which features GPU clock speed of 1257 MHz, and 8192 MB of GDDR5 RAM set to run at 2000 MHz through a 256-bit bus. It also is comprised of 2304 Stream Processors, 144 TAUs, and 32 Raster Operation 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

As far as performance goes, the Radeon RX 580 should in theory be a lot superior to 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 much (more or less 1594%) faster with regards to 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 quite a bit (approximately 276%) better at AA than the Radeon HD 3850 512MB, and also should be able to handle higher resolutions without slowing down too much. (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: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses 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 number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total texture units 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 most pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant 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

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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