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GeForce GTX 470 vs Radeon HD 4850 X2 512MB

Intro

The GeForce GTX 470 has clock speeds of 607 MHz on the GPU, and 837 MHz on the 1280 MB of GDDR5 RAM. It features 448 SPUs as well as 56 Texture Address Units and 40 Rasterization Operator Units.

Compare that to the Radeon HD 4850 X2 512MB, which comes with a clock speed of 625 MHz and a GDDR3 memory frequency of 993 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It is comprised of 800(160x5) SPUs, 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 512MB 250 Watts
Difference: 35 Watts (16%)

Memory Bandwidth

In theory, the GeForce GTX 470 should be 5% quicker than the Radeon HD 4850 X2 512MB overall, because of its higher data rate. (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 should be much (more or less 47%) more effective 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

If running with lots of anti-aliasing is important to you, then the GeForce GTX 470 is a better choice, by a large margin. (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: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of texture units by the core 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 applied per second.

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