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Radeon HD 4850 X2 1GB vs Radeon R9 270X

Intro

The Radeon HD 4850 X2 1GB uses a 55 nm design. AMD has set the core frequency at 625 MHz. The GDDR3 RAM is set to run at a speed of 993 MHz on this specific card. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

Compare all that to the Radeon R9 270X, which features GPU clock speed of 1000 MHz, and 2048 MB of GDDR5 RAM set to run at 1400 MHz through a 256-bit bus. It also is made up of 1280 Stream Processors, 80 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270X 180 Watts
Radeon HD 4850 X2 1GB 250 Watts
Difference: 70 Watts (39%)

Memory Bandwidth

As far as performance goes, the Radeon R9 270X should theoretically be quite a bit superior to the Radeon HD 4850 X2 1GB in general. (explain)

Radeon R9 270X 179200 MB/sec
Radeon HD 4850 X2 1GB 127104 MB/sec
Difference: 52096 (41%)

Texel Rate

The Radeon R9 270X should be much (more or less 60%) better at AF than the Radeon HD 4850 X2 1GB. (explain)

Radeon R9 270X 80000 Mtexels/sec
Radeon HD 4850 X2 1GB 50000 Mtexels/sec
Difference: 30000 (60%)

Pixel Rate

The Radeon R9 270X should be a lot (more or less 60%) faster with regards to FSAA than the Radeon HD 4850 X2 1GB, and capable of handling higher resolutions better. (explain)

Radeon R9 270X 32000 Mpixels/sec
Radeon HD 4850 X2 1GB 20000 Mpixels/sec
Difference: 12000 (60%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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Radeon HD 4850 X2 1GB

Amazon.com

Check prices at:

Radeon R9 270X

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 X2 1GB Radeon R9 270X
Manufacturer AMD AMD
Year Nov 7, 2008 October 2013
Code Name R700 Curacao XT
Memory 1024 MB (x2) 2048 MB
Core Speed 625 MHz (x2) 1000 MHz
Memory Speed 1986 MHz (x2) 5600 MHz
Power (Max TDP) 250 watts 180 watts
Bandwidth 127104 MB/sec 179200 MB/sec
Texel Rate 50000 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 20000 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 800(160x5) (x2) 1280
Texture Mapping Units 40 (x2) 80
Render Output Units 16 (x2) 32
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 256-bit
Fab Process 55 nm 28 nm
Transistors 956 million 2800 million
Bus PCIe 2.0 x16 (PCIe bridge) 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 maximum amount of information (measured in MB per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4850 X2 1GB

Amazon.com

Check prices at:

Radeon R9 270X

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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