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Radeon HD 4850 512MB vs Radeon R9 M270X

Intro

The Radeon HD 4850 512MB features core clock speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 RAM. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Compare those specs to the Radeon R9 M270X, which comes with GPU clock speed of 725 MHz, and 2048 MB of GDDR5 RAM running at 1125 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M270X, in theory, should be a little bit faster than the Radeon HD 4850 512MB overall. (explain)

Radeon R9 M270X 72000 MB/sec
Radeon HD 4850 512MB 63552 MB/sec
Difference: 8448 (13%)

Texel Rate

The Radeon R9 M270X is just a bit (approximately 16%) more effective at anisotropic filtering than the Radeon HD 4850 512MB. (explain)

Radeon R9 M270X 29000 Mtexels/sec
Radeon HD 4850 512MB 25000 Mtexels/sec
Difference: 4000 (16%)

Pixel Rate

The Radeon R9 M270X is a small bit (more or less 16%) more effective at anti-aliasing than the Radeon HD 4850 512MB, and also able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 M270X 11600 Mpixels/sec
Radeon HD 4850 512MB 10000 Mpixels/sec
Difference: 1600 (16%)

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 512MB

Amazon.com

Check prices at:

Radeon R9 M270X

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 512MB Radeon R9 M270X
Manufacturer AMD AMD
Year Jun 25, 2008 May 1 2014
Code Name RV770 PRO Venus XT
Memory 512 MB 2048 MB
Core Speed 625 MHz 725 MHz
Memory Speed 1986 MHz 4500 MHz
Power (Max TDP) 110 watts (Unknown) watts
Bandwidth 63552 MB/sec 72000 MB/sec
Texel Rate 25000 Mtexels/sec 29000 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 800(160x5) 640
Texture Mapping Units 40 40
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-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 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If 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 amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few 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 512MB

Amazon.com

Check prices at:

Radeon R9 M270X

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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