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Radeon HD 3850 256MB vs Radeon R9 M395X

Intro

The Radeon HD 3850 256MB comes with a GPU clock speed of 668 MHz, and the 256 MB of GDDR3 memory runs at 828 MHz through a 256-bit bus. It also is made up of 320(64x5) SPUs, 16 Texture Address Units, and 16 ROPs.

Compare those specifications to the Radeon R9 M395X, which comes with a clock frequency of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3850 256MB 75 Watts
Radeon R9 M395X 125 Watts
Difference: 50 Watts (67%)

Memory Bandwidth

The Radeon R9 M395X should theoretically be a lot faster than the Radeon HD 3850 256MB overall. (explain)

Radeon R9 M395X 160000 MB/sec
Radeon HD 3850 256MB 52992 MB/sec
Difference: 107008 (202%)

Texel Rate

The Radeon R9 M395X will be a lot (more or less 766%) more effective at texture filtering than the Radeon HD 3850 256MB. (explain)

Radeon R9 M395X 92544 Mtexels/sec
Radeon HD 3850 256MB 10688 Mtexels/sec
Difference: 81856 (766%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 M395X is a better choice, and very much so. (explain)

Radeon R9 M395X 23136 Mpixels/sec
Radeon HD 3850 256MB 10688 Mpixels/sec
Difference: 12448 (116%)

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 256MB

Amazon.com

Check prices at:

Radeon R9 M395X

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 256MB Radeon R9 M395X
Manufacturer AMD AMD
Year Nov 19, 2007 2015
Code Name RV670 PRO Tonga
Memory 256 MB 4096 MB
Core Speed 668 MHz 723 MHz
Memory Speed 1656 MHz 5000 MHz
Power (Max TDP) 75 watts 125 watts
Bandwidth 52992 MB/sec 160000 MB/sec
Texel Rate 10688 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 10688 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 320(64x5) 2048
Texture Mapping Units 16 128
Render Output Units 16 32
Bus Type GDDR3 GDDR5
Bus Width 256-bit 256-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 12
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 processed per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at handling 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 a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). 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 get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3850 256MB

Amazon.com

Check prices at:

Radeon R9 M395X

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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