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Radeon HD 3850 256MB vs Radeon R9 M395X

Intro

The Radeon HD 3850 256MB features a clock speed of 668 MHz and a GDDR3 memory frequency of 828 MHz. It also uses a 256-bit memory bus, and uses a 55 nm design. It is made up of 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.

Compare all that to the Radeon R9 M395X, which uses a 28 nm design. AMD has set the core speed at 723 MHz. The GDDR5 memory works at a speed of 1250 MHz on this specific model. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator 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 much (more or less 766%) faster with regards to 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 using 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 maximum amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max 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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