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GeForce GTX 470 vs Radeon HD 4850 X2 512MB

Intro

The GeForce GTX 470 has a GPU clock speed of 607 MHz, and the 1280 MB of GDDR5 RAM runs at 837 MHz through a 320-bit bus. It also is made up of 448 Stream Processors, 56 TAUs, and 40 Raster Operation Units.

Compare those specs to the Radeon HD 4850 X2 512MB, which makes use of a 55 nm design. AMD has set the core frequency at 625 MHz. The GDDR3 RAM runs at a speed of 993 MHz on this model. It features 800(160x5) SPUs along with 40 Texture Address Units 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 512MB 250 Watts
Difference: 35 Watts (16%)

Memory Bandwidth

The GeForce GTX 470 should theoretically be a small bit faster than the Radeon HD 4850 X2 512MB in general. (explain)

GeForce GTX 470 133920 MB/sec
Radeon HD 4850 X2 512MB 127104 MB/sec
Difference: 6816 (5%)

Texel Rate

The Radeon HD 4850 X2 512MB will be a lot (more or less 47%) better at AF than the GeForce GTX 470. (explain)

Radeon HD 4850 X2 512MB 50000 Mtexels/sec
GeForce GTX 470 33992 Mtexels/sec
Difference: 16008 (47%)

Pixel Rate

The GeForce GTX 470 is a lot (approximately 21%) more effective at AA than the Radeon HD 4850 X2 512MB, and will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 470 24280 Mpixels/sec
Radeon HD 4850 X2 512MB 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

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.

Specifications

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Model GeForce GTX 470 Radeon HD 4850 X2 512MB
Manufacturer nVidia AMD
Year March 2010 Nov 7, 2008
Code Name GF100 R700
Memory 1280 MB 512 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: Bandwidth is the largest amount of information (measured in MB per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, the result 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 AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 maximum number of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 470

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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