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GeForce GTX 470 vs Radeon HD 4850 X2 1GB

Intro

The GeForce GTX 470 has a clock speed of 607 MHz and a GDDR5 memory frequency of 837 MHz. It also uses a 320-bit bus, and uses a 40 nm design. It features 448 SPUs, 56 Texture Address Units, and 40 Raster Operation Units.

Compare all of that to the Radeon HD 4850 X2 1GB, which features core speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR3 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 470 215 Watts
Radeon HD 4850 X2 1GB 250 Watts
Difference: 35 Watts (16%)

Memory Bandwidth

In theory, the GeForce GTX 470 will be 5% quicker than the Radeon HD 4850 X2 1GB in general, due to its higher bandwidth. (explain)

GeForce GTX 470 133920 MB/sec
Radeon HD 4850 X2 1GB 127104 MB/sec
Difference: 6816 (5%)

Texel Rate

The Radeon HD 4850 X2 1GB will be quite a bit (more or less 47%) faster with regards to anisotropic filtering than the GeForce GTX 470. (explain)

Radeon HD 4850 X2 1GB 50000 Mtexels/sec
GeForce GTX 470 33992 Mtexels/sec
Difference: 16008 (47%)

Pixel Rate

The GeForce GTX 470 will be much (about 21%) better at anti-aliasing than the Radeon HD 4850 X2 1GB, and able to handle higher screen resolutions better. (explain)

GeForce GTX 470 24280 Mpixels/sec
Radeon HD 4850 X2 1GB 20000 Mpixels/sec
Difference: 4280 (21%)

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 470

Amazon.com

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Radeon HD 4850 X2 1GB

Amazon.com

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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 470 Radeon HD 4850 X2 1GB
Manufacturer nVidia AMD
Year March 2010 Nov 7, 2008
Code Name GF100 R700
Memory 1280 MB 1024 MB (x2)
Core Speed 607 MHz 625 MHz (x2)
Memory Speed 3348 MHz 1986 MHz (x2)
Power (Max TDP) 215 watts 250 watts
Bandwidth 133920 MB/sec 127104 MB/sec
Texel Rate 33992 Mtexels/sec 50000 Mtexels/sec
Pixel Rate 24280 Mpixels/sec 20000 Mpixels/sec
Unified Shaders 448 800(160x5) (x2)
Texture Mapping Units 56 40 (x2)
Render Output Units 40 16 (x2)
Bus Type GDDR5 GDDR3
Bus Width 320-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: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. 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 fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 470

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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