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Radeon HD 3850 1GB vs Radeon R9 M395X

Intro

The Radeon HD 3850 1GB comes with a core clock speed of 668 MHz and a GDDR3 memory frequency of 828 MHz. It also features a 256-bit bus, and uses a 55 nm design. It 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 speed of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3850 1GB 75 Watts
Radeon R9 M395X 125 Watts
Difference: 50 Watts (67%)

Memory Bandwidth

The Radeon R9 M395X should in theory be much faster than the Radeon HD 3850 1GB overall. (explain)

Radeon R9 M395X 160000 MB/sec
Radeon HD 3850 1GB 52992 MB/sec
Difference: 107008 (202%)

Texel Rate

The Radeon R9 M395X is a lot (more or less 766%) more effective at texture filtering than the Radeon HD 3850 1GB. (explain)

Radeon R9 M395X 92544 Mtexels/sec
Radeon HD 3850 1GB 10688 Mtexels/sec
Difference: 81856 (766%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 M395X is a better choice, by far. (explain)

Radeon R9 M395X 23136 Mpixels/sec
Radeon HD 3850 1GB 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 1GB

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 1GB Radeon R9 M395X
Manufacturer AMD AMD
Year Nov 19, 2007 2015
Code Name RV670 PRO Tonga
Memory 1024 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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the 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 amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 3850 1GB

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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