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Radeon HD 4850 X2 1GB vs Radeon HD 5750 512MB

Intro

The Radeon HD 4850 X2 1GB makes use of a 55 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR3 memory runs at a frequency of 993 MHz on this specific card. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Compare those specs to the Radeon HD 5750 512MB, which has GPU core speed of 700 MHz, and 512 MB of GDDR5 RAM set to run at 1150 MHz through a 128-bit bus. It also features 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 512MB 86 Watts
Radeon HD 4850 X2 1GB 250 Watts
Difference: 164 Watts (191%)

Memory Bandwidth

Performance-wise, the Radeon HD 4850 X2 1GB should theoretically be much better than the Radeon HD 5750 512MB overall. (explain)

Radeon HD 4850 X2 1GB 127104 MB/sec
Radeon HD 5750 512MB 73600 MB/sec
Difference: 53504 (73%)

Texel Rate

The Radeon HD 4850 X2 1GB should be a lot (about 98%) more effective at AF than the Radeon HD 5750 512MB. (explain)

Radeon HD 4850 X2 1GB 50000 Mtexels/sec
Radeon HD 5750 512MB 25200 Mtexels/sec
Difference: 24800 (98%)

Pixel Rate

The Radeon HD 4850 X2 1GB will be much (about 79%) more effective at full screen anti-aliasing than the Radeon HD 5750 512MB, and also will be able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 4850 X2 1GB 20000 Mpixels/sec
Radeon HD 5750 512MB 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 512MB

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 512MB
Manufacturer AMD AMD
Year Nov 7, 2008 October 13, 2009
Code Name R700 Juniper LE
Memory 1024 MB (x2) 512 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 (counted in megabytes per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it should 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 texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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 ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 4850 X2 1GB

Amazon.com

Check prices at:

Radeon HD 5750 512MB

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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