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Radeon HD 4850 1GB vs Radeon HD 5750 1GB

Intro

The Radeon HD 4850 1GB has clock speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR4 memory. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Compare all that to the Radeon HD 5750 1GB, which features GPU core speed of 700 MHz, and 1024 MB of GDDR5 memory set to run at 1150 MHz through a 128-bit bus. It also is comprised of 720(144x5) Stream Processors, 36 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB 86 Watts
Radeon HD 4850 1GB 110 Watts
Difference: 24 Watts (28%)

Memory Bandwidth

The Radeon HD 5750 1GB, in theory, should perform a small bit faster than the Radeon HD 4850 1GB overall. (explain)

Radeon HD 5750 1GB 73600 MB/sec
Radeon HD 4850 1GB 63552 MB/sec
Difference: 10048 (16%)

Texel Rate

The Radeon HD 5750 1GB should be a bit (approximately 1%) better at texture filtering than the Radeon HD 4850 1GB. (explain)

Radeon HD 5750 1GB 25200 Mtexels/sec
Radeon HD 4850 1GB 25000 Mtexels/sec
Difference: 200 (1%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 5750 1GB is superior to the Radeon HD 4850 1GB, though only just barely. (explain)

Radeon HD 5750 1GB 11200 Mpixels/sec
Radeon HD 4850 1GB 10000 Mpixels/sec
Difference: 1200 (12%)

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 5750 1GB

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 5750 1GB
Manufacturer AMD AMD
Year Jun 25, 2008 October 13, 2009
Code Name RV770 PRO Juniper LE
Memory 1024 MB 1024 MB
Core Speed 625 MHz 700 MHz
Memory Speed 1986 MHz 4600 MHz
Power (Max TDP) 110 watts 86 watts
Bandwidth 63552 MB/sec 73600 MB/sec
Texel Rate 25000 Mtexels/sec 25200 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 11200 Mpixels/sec
Unified Shaders 800(160x5) 720(144x5)
Texture Mapping Units 40 36
Render Output Units 16 16
Bus Type GDDR4 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 40 nm
Transistors 956 million 1040 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 information (in units of MB per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the 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 amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory 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 5750 1GB

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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