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GeForce GTX 560 vs Radeon HD 4850 X2 512MB

Intro

The GeForce GTX 560 features a GPU core speed of 810 MHz, and the 1024 MB of GDDR5 memory is set to run at 1001 MHz through a 256-bit bus. It also is comprised of 336 Stream Processors, 56 TAUs, and 32 ROPs.

Compare all of that to the Radeon HD 4850 X2 512MB, which features a clock frequency of 625 MHz and a GDDR3 memory frequency of 993 MHz. It also uses a 256-bit memory bus, and makes use of a 55 nm design. It features 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 560 150 Watts
Radeon HD 4850 X2 512MB 250 Watts
Difference: 100 Watts (67%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 560 should be a bit faster than the Radeon HD 4850 X2 512MB in general. (explain)

GeForce GTX 560 128128 MB/sec
Radeon HD 4850 X2 512MB 127104 MB/sec
Difference: 1024 (1%)

Texel Rate

The Radeon HD 4850 X2 512MB should be a bit (about 10%) better at AF than the GeForce GTX 560. (explain)

Radeon HD 4850 X2 512MB 50000 Mtexels/sec
GeForce GTX 560 45360 Mtexels/sec
Difference: 4640 (10%)

Pixel Rate

The GeForce GTX 560 will be a lot (more or less 30%) better at FSAA than the Radeon HD 4850 X2 512MB, and also should be able to handle higher resolutions better. (explain)

GeForce GTX 560 25920 Mpixels/sec
Radeon HD 4850 X2 512MB 20000 Mpixels/sec
Difference: 5920 (30%)

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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GeForce GTX 560

Amazon.com

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Radeon HD 4850 X2 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 GeForce GTX 560 Radeon HD 4850 X2 512MB
Manufacturer nVidia AMD
Year May 2011 Nov 7, 2008
Code Name GF114 R700
Memory 1024 MB 512 MB (x2)
Core Speed 810 MHz 625 MHz (x2)
Memory Speed 4004 MHz 1986 MHz (x2)
Power (Max TDP) 150 watts 250 watts
Bandwidth 128128 MB/sec 127104 MB/sec
Texel Rate 45360 Mtexels/sec 50000 Mtexels/sec
Pixel Rate 25920 Mpixels/sec 20000 Mpixels/sec
Unified Shaders 336 800(160x5) (x2)
Texture Mapping Units 56 40 (x2)
Render Output Units 32 16 (x2)
Bus Type GDDR5 GDDR3
Bus Width 256-bit 256-bit (x2)
Fab Process 40 nm 55 nm
Transistors 1950 million 956 million
Bus PCIe 2.0 x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX 560

Amazon.com

Check prices at:

Radeon HD 4850 X2 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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