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Radeon HD 4850 2GB vs Radeon R9 M395X

Intro

The Radeon HD 4850 2GB comes with a GPU clock speed of 625 MHz, and the 2048 MB of GDDR4 memory is set to run at 993 MHz through a 256-bit bus. It also is made up of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

Compare that to the Radeon R9 M395X, which comes with core clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 2GB 110 Watts
Radeon R9 M395X 125 Watts
Difference: 15 Watts (14%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M395X should in theory be much superior to the Radeon HD 4850 2GB in general. (explain)

Radeon R9 M395X 160000 MB/sec
Radeon HD 4850 2GB 63552 MB/sec
Difference: 96448 (152%)

Texel Rate

The Radeon R9 M395X is quite a bit (more or less 270%) faster with regards to AF than the Radeon HD 4850 2GB. (explain)

Radeon R9 M395X 92544 Mtexels/sec
Radeon HD 4850 2GB 25000 Mtexels/sec
Difference: 67544 (270%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M395X is the winner, by far. (explain)

Radeon R9 M395X 23136 Mpixels/sec
Radeon HD 4850 2GB 10000 Mpixels/sec
Difference: 13136 (131%)

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 4850 2GB

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 4850 2GB Radeon R9 M395X
Manufacturer AMD AMD
Year Jun 25, 2008 2015
Code Name RV770 PRO Tonga
Memory 2048 MB 4096 MB
Core Speed 625 MHz 723 MHz
Memory Speed 1986 MHz 5000 MHz
Power (Max TDP) 110 watts 125 watts
Bandwidth 63552 MB/sec 160000 MB/sec
Texel Rate 25000 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 800(160x5) 2048
Texture Mapping Units 40 128
Render Output Units 16 32
Bus Type GDDR4 GDDR5
Bus Width 256-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 956 million (Unknown) million
Bus PCIe 2.0 x16 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 information (in units of MB per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 maximum number of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill 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 maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4850 2GB

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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