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Radeon HD 4850 X2 1GB vs Radeon HD 5670

Intro

The Radeon HD 4850 X2 1GB comes with a GPU core speed of 625 MHz, and the 1024 MB of GDDR3 RAM is set to run at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Compare those specs to the Radeon HD 5670, which uses a 40 nm design. AMD has set the core frequency at 775 MHz. The GDDR5 RAM runs at a frequency of 1000 MHz on this particular model. It features 400(80x5) SPUs as well as 20 Texture Address Units and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670 61 Watts
Radeon HD 4850 X2 1GB 250 Watts
Difference: 189 Watts (310%)

Memory Bandwidth

The Radeon HD 4850 X2 1GB should in theory be a lot faster than the Radeon HD 5670 in general. (explain)

Radeon HD 4850 X2 1GB 127104 MB/sec
Radeon HD 5670 64000 MB/sec
Difference: 63104 (99%)

Texel Rate

The Radeon HD 4850 X2 1GB will be quite a bit (approximately 223%) better at anisotropic filtering than the Radeon HD 5670. (explain)

Radeon HD 4850 X2 1GB 50000 Mtexels/sec
Radeon HD 5670 15500 Mtexels/sec
Difference: 34500 (223%)

Pixel Rate

If using high levels of AA 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 5670 6200 Mpixels/sec
Difference: 13800 (223%)

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 5670

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 HD 5670
Manufacturer AMD AMD
Year Nov 7, 2008 January 14, 2010
Code Name R700 Redwood XT
Memory 1024 MB (x2) 1024 MB
Core Speed 625 MHz (x2) 775 MHz
Memory Speed 1986 MHz (x2) 4000 MHz
Power (Max TDP) 250 watts 61 watts
Bandwidth 127104 MB/sec 64000 MB/sec
Texel Rate 50000 Mtexels/sec 15500 Mtexels/sec
Pixel Rate 20000 Mpixels/sec 6200 Mpixels/sec
Unified Shaders 800(160x5) (x2) 400(80x5)
Texture Mapping Units 40 (x2) 20
Render Output Units 16 (x2) 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 55 nm 40 nm
Transistors 956 million 627 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: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high 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 amount of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling 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 the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. 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 rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 4850 X2 1GB

Amazon.com

Check prices at:

Radeon HD 5670

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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