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GeForce GTX 480 vs Radeon HD 4850 X2 1GB

Intro

The GeForce GTX 480 features core clock speeds of 700 MHz on the GPU, and 924 MHz on the 1536 MB of GDDR5 memory. It features 480 SPUs along with 60 TAUs and 48 Rasterization Operator Units.

Compare those specs to the Radeon HD 4850 X2 1GB, which makes use of a 55 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR3 memory works at a speed of 993 MHz on this card. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Performance-wise, the GeForce GTX 480 should theoretically be a lot better than the Radeon HD 4850 X2 1GB in general. (explain)

GeForce GTX 480 177408 MB/sec
Radeon HD 4850 X2 1GB 127104 MB/sec
Difference: 50304 (40%)

Texel Rate

The Radeon HD 4850 X2 1GB is a small bit (more or less 19%) more effective at texture filtering than the GeForce GTX 480. (explain)

Radeon HD 4850 X2 1GB 50000 Mtexels/sec
GeForce GTX 480 42000 Mtexels/sec
Difference: 8000 (19%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 480 is the winner, by far. (explain)

GeForce GTX 480 33600 Mpixels/sec
Radeon HD 4850 X2 1GB 20000 Mpixels/sec
Difference: 13600 (68%)

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 480

Amazon.com

Check prices at:

Radeon HD 4850 X2 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 GeForce GTX 480 Radeon HD 4850 X2 1GB
Manufacturer nVidia AMD
Year March 2010 Nov 7, 2008
Code Name GF100 R700
Memory 1536 MB 1024 MB (x2)
Core Speed 700 MHz 625 MHz (x2)
Memory Speed 3696 MHz 1986 MHz (x2)
Power (Max TDP) 250 watts 250 watts
Bandwidth 177408 MB/sec 127104 MB/sec
Texel Rate 42000 Mtexels/sec 50000 Mtexels/sec
Pixel Rate 33600 Mpixels/sec 20000 Mpixels/sec
Unified Shaders 480 800(160x5) (x2)
Texture Mapping Units 60 40 (x2)
Render Output Units 48 16 (x2)
Bus Type GDDR5 GDDR3
Bus Width 384-bit 256-bit (x2)
Fab Process 40 nm 55 nm
Transistors 3000 million 956 million
Bus PCIe x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be 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 better the texel rate, the better the video 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 number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant 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

GeForce GTX 480

Amazon.com

Check prices at:

Radeon HD 4850 X2 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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