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Radeon HD 4850 1GB vs Radeon HD 5670

Intro

The Radeon HD 4850 1GB has a GPU clock speed of 625 MHz, and the 1024 MB of GDDR4 RAM runs at 993 MHz through a 256-bit bus. It also features 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

Compare that to the Radeon HD 5670, which features a GPU core clock speed of 775 MHz, and 1024 MB of GDDR5 RAM running at 1000 MHz through a 128-bit bus. It also features 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 1GB 110 Watts
Difference: 49 Watts (80%)

Memory Bandwidth

Theoretically, the Radeon HD 5670 should perform a bit faster than the Radeon HD 4850 1GB overall. (explain)

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

Texel Rate

The Radeon HD 4850 1GB will be much (approximately 61%) more effective at anisotropic filtering than the Radeon HD 5670. (explain)

Radeon HD 4850 1GB 25000 Mtexels/sec
Radeon HD 5670 15500 Mtexels/sec
Difference: 9500 (61%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 4850 1GB is the winner, and very much so. (explain)

Radeon HD 4850 1GB 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 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 1GB Radeon HD 5670
Manufacturer AMD AMD
Year Jun 25, 2008 January 14, 2010
Code Name RV770 PRO Redwood XT
Memory 1024 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: Memory bandwidth is the largest amount of data (counted in MB 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 the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the 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 number of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel 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 potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4850 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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