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Radeon HD 4850 1GB vs Radeon HD 6570 (OEM) 2GB

Intro

The Radeon HD 4850 1GB comes with a GPU core speed of 625 MHz, and the 1024 MB of GDDR4 memory runs at 993 MHz through a 256-bit bus. It also features 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Compare those specifications to the Radeon HD 6570 (OEM) 2GB, which makes use of a 40 nm design. AMD has set the core speed at 650 MHz. The GDDR5 memory is set to run at a speed of 1000 MHz on this specific model. It features 480 SPUs along with 24 TAUs and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 2GB 50 Watts
Radeon HD 4850 1GB 110 Watts
Difference: 60 Watts (120%)

Memory Bandwidth

Theoretically, the Radeon HD 6570 (OEM) 2GB should be a bit faster than the Radeon HD 4850 1GB overall. (explain)

Radeon HD 6570 (OEM) 2GB 64000 MB/sec
Radeon HD 4850 1GB 63552 MB/sec
Difference: 448 (1%)

Texel Rate

The Radeon HD 4850 1GB will be a lot (approximately 60%) better at anisotropic filtering than the Radeon HD 6570 (OEM) 2GB. (explain)

Radeon HD 4850 1GB 25000 Mtexels/sec
Radeon HD 6570 (OEM) 2GB 15600 Mtexels/sec
Difference: 9400 (60%)

Pixel Rate

The Radeon HD 4850 1GB will be quite a bit (more or less 92%) faster with regards to full screen anti-aliasing than the Radeon HD 6570 (OEM) 2GB, and able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 4850 1GB 10000 Mpixels/sec
Radeon HD 6570 (OEM) 2GB 5200 Mpixels/sec
Difference: 4800 (92%)

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 6570 (OEM) 2GB

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 6570 (OEM) 2GB
Manufacturer AMD AMD
Year Jun 25, 2008 February 2011
Code Name RV770 PRO Turks
Memory 1024 MB 1024 MB
Core Speed 625 MHz 650 MHz
Memory Speed 1986 MHz 4000 MHz
Power (Max TDP) 110 watts 50 watts
Bandwidth 63552 MB/sec 64000 MB/sec
Texel Rate 25000 Mtexels/sec 15600 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 5200 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: Bandwidth is the largest amount of information (counted in MB per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the 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 amount of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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Radeon HD 4850 1GB

Amazon.com

Check prices at:

Radeon HD 6570 (OEM) 2GB

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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