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Radeon HD 4850 2GB vs Radeon HD 5670

Intro

The Radeon HD 4850 2GB uses a 55 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR4 memory is set to run at a speed of 993 MHz on this card. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Compare all of that to the Radeon HD 5670, which has a clock frequency of 775 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 400(80x5) SPUs, 20 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670 61 Watts
Radeon HD 4850 2GB 110 Watts
Difference: 49 Watts (80%)

Memory Bandwidth

As far as performance goes, the Radeon HD 5670 should theoretically be a small bit superior to the Radeon HD 4850 2GB overall. (explain)

Radeon HD 5670 64000 MB/sec
Radeon HD 4850 2GB 63552 MB/sec
Difference: 448 (1%)

Texel Rate

The Radeon HD 4850 2GB is much (approximately 61%) more effective at anisotropic filtering than the Radeon HD 5670. (explain)

Radeon HD 4850 2GB 25000 Mtexels/sec
Radeon HD 5670 15500 Mtexels/sec
Difference: 9500 (61%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 4850 2GB is the winner, and very much so. (explain)

Radeon HD 4850 2GB 10000 Mpixels/sec
Radeon HD 5670 6200 Mpixels/sec
Difference: 3800 (61%)

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 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 2GB Radeon HD 5670
Manufacturer AMD AMD
Year Jun 25, 2008 January 14, 2010
Code Name RV770 PRO Redwood XT
Memory 2048 MB 1024 MB
Core Speed 625 MHz 775 MHz
Memory Speed 1986 MHz 4000 MHz
Power (Max TDP) 110 watts 61 watts
Bandwidth 63552 MB/sec 64000 MB/sec
Texel Rate 25000 Mtexels/sec 15500 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 6200 Mpixels/sec
Unified Shaders 800(160x5) 400(80x5)
Texture Mapping Units 40 20
Render Output Units 16 8
Bus Type GDDR4 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 40 nm
Transistors 956 million 627 million
Bus PCIe 2.0 x16 PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 4850 2GB

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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