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Radeon HD 3850 512MB vs Radeon R9 M270X

Intro

The Radeon HD 3850 512MB uses a 55 nm design. AMD has clocked the core speed at 668 MHz. The GDDR3 RAM works at a speed of 828 MHz on this card. It features 320(64x5) SPUs as well as 16 TAUs and 16 ROPs.

Compare that to the Radeon R9 M270X, which features a core clock speed of 725 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M270X, in theory, should perform a lot faster than the Radeon HD 3850 512MB in general. (explain)

Radeon R9 M270X 72000 MB/sec
Radeon HD 3850 512MB 52992 MB/sec
Difference: 19008 (36%)

Texel Rate

The Radeon R9 M270X should be much (more or less 171%) better at AF than the Radeon HD 3850 512MB. (explain)

Radeon R9 M270X 29000 Mtexels/sec
Radeon HD 3850 512MB 10688 Mtexels/sec
Difference: 18312 (171%)

Pixel Rate

The Radeon R9 M270X will be just a bit (approximately 9%) faster with regards to FSAA than the Radeon HD 3850 512MB, and will be capable of handling higher resolutions more effectively. (explain)

Radeon R9 M270X 11600 Mpixels/sec
Radeon HD 3850 512MB 10688 Mpixels/sec
Difference: 912 (9%)

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

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Radeon R9 M270X

Amazon.com

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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 R9 M270X
Manufacturer AMD AMD
Year Nov 19, 2007 May 1 2014
Code Name RV670 PRO Venus XT
Memory 512 MB 2048 MB
Core Speed 668 MHz 725 MHz
Memory Speed 1656 MHz 4500 MHz
Power (Max TDP) 75 watts (Unknown) watts
Bandwidth 52992 MB/sec 72000 MB/sec
Texel Rate 10688 Mtexels/sec 29000 Mtexels/sec
Pixel Rate 10688 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 320(64x5) 640
Texture Mapping Units 16 40
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 2.0 x16/AGP 8x PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably 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

Hide Prices

Radeon HD 3850 512MB

Amazon.com

Check prices at:

Radeon R9 M270X

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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