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Radeon HD 4850 X2 1GB vs Radeon HD 5750 1GB

Intro

The Radeon HD 4850 X2 1GB makes use of a 55 nm design. AMD has set the core frequency at 625 MHz. The GDDR3 memory is set to run at a speed of 993 MHz on this model. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Compare those specs to the Radeon HD 5750 1GB, which has core clock speeds of 700 MHz on the GPU, and 1150 MHz on the 1024 MB of GDDR5 memory. It features 720(144x5) SPUs along with 36 Texture Address Units 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 X2 1GB 250 Watts
Difference: 164 Watts (191%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4850 X2 1GB will be 73% faster than the Radeon HD 5750 1GB in general, because of its greater bandwidth. (explain)

Radeon HD 4850 X2 1GB 127104 MB/sec
Radeon HD 5750 1GB 73600 MB/sec
Difference: 53504 (73%)

Texel Rate

The Radeon HD 4850 X2 1GB is much (more or less 98%) more effective at texture filtering than the Radeon HD 5750 1GB. (explain)

Radeon HD 4850 X2 1GB 50000 Mtexels/sec
Radeon HD 5750 1GB 25200 Mtexels/sec
Difference: 24800 (98%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 4850 X2 1GB is a better choice, by a large margin. (explain)

Radeon HD 4850 X2 1GB 20000 Mpixels/sec
Radeon HD 5750 1GB 11200 Mpixels/sec
Difference: 8800 (79%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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Radeon HD 4850 X2 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 X2 1GB Radeon HD 5750 1GB
Manufacturer AMD AMD
Year Nov 7, 2008 October 13, 2009
Code Name R700 Juniper LE
Memory 1024 MB (x2) 1024 MB
Core Speed 625 MHz (x2) 700 MHz
Memory Speed 1986 MHz (x2) 4600 MHz
Power (Max TDP) 250 watts 86 watts
Bandwidth 127104 MB/sec 73600 MB/sec
Texel Rate 50000 Mtexels/sec 25200 Mtexels/sec
Pixel Rate 20000 Mpixels/sec 11200 Mpixels/sec
Unified Shaders 800(160x5) (x2) 720(144x5)
Texture Mapping Units 40 (x2) 36
Render Output Units 16 (x2) 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 55 nm 40 nm
Transistors 956 million 1040 million
Bus PCIe 2.0 x16 (PCIe bridge) PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 are processed per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the 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 amount of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. 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 lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon HD 4850 X2 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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