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GeForce GT 220 GDDR3 vs Radeon HD 4870 X2

Intro

The GeForce GT 220 GDDR3 comes with a core clock speed of 625 MHz and a GDDR3 memory speed of 1012 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is comprised of 48 SPUs, 16 TAUs, and 8 Raster Operation Units.

Compare those specifications to the Radeon HD 4870 X2, which comes with clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3 58 Watts
Radeon HD 4870 X2 350 Watts
Difference: 292 Watts (503%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4870 X2 should theoretically be a lot better than the GeForce GT 220 GDDR3 in general. (explain)

Radeon HD 4870 X2 230400 MB/sec
GeForce GT 220 GDDR3 32384 MB/sec
Difference: 198016 (611%)

Texel Rate

The Radeon HD 4870 X2 is a lot (approximately 500%) better at AF than the GeForce GT 220 GDDR3. (explain)

Radeon HD 4870 X2 60000 Mtexels/sec
GeForce GT 220 GDDR3 10000 Mtexels/sec
Difference: 50000 (500%)

Pixel Rate

The Radeon HD 4870 X2 will be much (more or less 380%) more effective at anti-aliasing than the GeForce GT 220 GDDR3, and capable of handling higher resolutions more effectively. (explain)

Radeon HD 4870 X2 24000 Mpixels/sec
GeForce GT 220 GDDR3 5000 Mpixels/sec
Difference: 19000 (380%)

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 GT 220 GDDR3

Amazon.com

Check prices at:

Radeon HD 4870 X2

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 GT 220 GDDR3 Radeon HD 4870 X2
Manufacturer nVidia AMD
Year October 2009 Aug 12, 2008
Code Name GT216 R700
Memory 512 MB 1024 MB (x2)
Core Speed 625 MHz 750 MHz (x2)
Memory Speed 2024 MHz 3600 MHz (x2)
Power (Max TDP) 58 watts 350 watts
Bandwidth 32384 MB/sec 230400 MB/sec
Texel Rate 10000 Mtexels/sec 60000 Mtexels/sec
Pixel Rate 5000 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 48 800(160x5) (x2)
Texture Mapping Units 16 40 (x2)
Render Output Units 8 16 (x2)
Bus Type GDDR3 GDDR5
Bus Width 128-bit 256-bit (x2)
Fab Process 40 nm 55 nm
Transistors 486 million 956 million
Bus PCIe 2.0 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.2 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core 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 fill rate also depends on many other factors, most notably 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 GT 220 GDDR3

Amazon.com

Check prices at:

Radeon HD 4870 X2

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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