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Radeon HD 3850 1GB vs Radeon R9 M395X

Intro

The Radeon HD 3850 1GB has a core clock frequency 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 Raster Operation Units.

Compare those specifications to the Radeon R9 M395X, which makes use of a 28 nm design. AMD has clocked the core speed at 723 MHz. The GDDR5 RAM runs 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 1GB 75 Watts
Radeon R9 M395X 125 Watts
Difference: 50 Watts (67%)

Memory Bandwidth

In theory, the Radeon R9 M395X will be 202% quicker than the Radeon HD 3850 1GB overall, due to its greater data rate. (explain)

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

Texel Rate

The Radeon R9 M395X will be a lot (about 766%) better 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

The Radeon R9 M395X is quite a bit (approximately 116%) better at AA than the Radeon HD 3850 1GB, and also capable of handling higher resolutions without slowing down too much. (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

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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 max amount of data (counted in MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum 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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