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Radeon HD 4850 X2 1GB vs Radeon HD 5830

Intro

The Radeon HD 4850 X2 1GB has core speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR3 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Compare all of that to the Radeon HD 5830, which has core clock speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 1120(224x5) SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5830 175 Watts
Radeon HD 4850 X2 1GB 250 Watts
Difference: 75 Watts (43%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5830 should be 1% quicker than the Radeon HD 4850 X2 1GB in general, due to its greater bandwidth. (explain)

Radeon HD 5830 128000 MB/sec
Radeon HD 4850 X2 1GB 127104 MB/sec
Difference: 896 (1%)

Texel Rate

The Radeon HD 4850 X2 1GB should be a bit (approximately 12%) faster with regards to anisotropic filtering than the Radeon HD 5830. (explain)

Radeon HD 4850 X2 1GB 50000 Mtexels/sec
Radeon HD 5830 44800 Mtexels/sec
Difference: 5200 (12%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 4850 X2 1GB is the winner, by far. (explain)

Radeon HD 4850 X2 1GB 20000 Mpixels/sec
Radeon HD 5830 12800 Mpixels/sec
Difference: 7200 (56%)

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 HD 5830

Amazon.com

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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 HD 5830
Manufacturer AMD AMD
Year Nov 7, 2008 February 25, 2010
Code Name R700 Cypress LE
Memory 1024 MB (x2) 1024 MB
Core Speed 625 MHz (x2) 800 MHz
Memory Speed 1986 MHz (x2) 4000 MHz
Power (Max TDP) 250 watts 175 watts
Bandwidth 127104 MB/sec 128000 MB/sec
Texel Rate 50000 Mtexels/sec 44800 Mtexels/sec
Pixel Rate 20000 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 800(160x5) (x2) 1120(224x5)
Texture Mapping Units 40 (x2) 56
Render Output Units 16 (x2) 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 256-bit
Fab Process 55 nm 40 nm
Transistors 956 million 2154 million
Bus PCIe 2.0 x16 (PCIe bridge) PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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 get to the max fill rate.

Display Prices

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Radeon HD 4850 X2 1GB

Amazon.com

Check prices at:

Radeon HD 5830

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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