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Radeon HD 4850 1GB vs Radeon HD 6670 (OEM)

Intro

The Radeon HD 4850 1GB makes use of a 55 nm design. AMD has set the core frequency at 625 MHz. The GDDR4 RAM works at a speed of 993 MHz on this specific model. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Compare all of that to the Radeon HD 6670 (OEM), which uses a 40 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this specific model. It features 480 SPUs as well as 24 TAUs and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 63 Watts
Radeon HD 4850 1GB 110 Watts
Difference: 47 Watts (75%)

Memory Bandwidth

Performance-wise, the Radeon HD 6670 (OEM) should theoretically be just a bit better than the Radeon HD 4850 1GB overall. (explain)

Radeon HD 6670 (OEM) 64000 MB/sec
Radeon HD 4850 1GB 63552 MB/sec
Difference: 448 (1%)

Texel Rate

The Radeon HD 4850 1GB should be much (about 30%) better at anisotropic filtering than the Radeon HD 6670 (OEM). (explain)

Radeon HD 4850 1GB 25000 Mtexels/sec
Radeon HD 6670 (OEM) 19200 Mtexels/sec
Difference: 5800 (30%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 4850 1GB is the winner, by far. (explain)

Radeon HD 4850 1GB 10000 Mpixels/sec
Radeon HD 6670 (OEM) 6400 Mpixels/sec
Difference: 3600 (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.

Price Comparison

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Radeon HD 4850 1GB

Amazon.com

Check prices at:

Radeon HD 6670 (OEM)

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 6670 (OEM)
Manufacturer AMD AMD
Year Jun 25, 2008 February 2011
Code Name RV770 PRO Turks
Memory 1024 MB 512 MB
Core Speed 625 MHz 800 MHz
Memory Speed 1986 MHz 4000 MHz
Power (Max TDP) 110 watts 63 watts
Bandwidth 63552 MB/sec 64000 MB/sec
Texel Rate 25000 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 6400 Mpixels/sec
Unified Shaders 800(160x5) 480
Texture Mapping Units 40 24
Render Output Units 16 8
Bus Type GDDR4 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 40 nm
Transistors 956 million 715 million
Bus PCIe 2.0 x16 PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR 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 graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4850 1GB

Amazon.com

Check prices at:

Radeon HD 6670 (OEM)

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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