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GeForce GT 220 GDDR3 vs GeForce GT 320


Intro

The GeForce GT 220 GDDR3 features a clock speed of 625 MHz and a GDDR3 memory frequency of 1012 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It features 48 SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Compare that to the GeForce GT 320, which makes use of a 40 nm design. nVidia has set the core frequency at 540 MHz. The GDDR3 memory works at a frequency of 790 MHz on this card. It features 72 SPUs as well as 24 Texture Address Units and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320 43 Watts
GeForce GT 220 GDDR3 58 Watts
Difference: 15 Watts (35%)

Memory Bandwidth

The GeForce GT 220 GDDR3 should in theory be much faster than the GeForce GT 320 in general. (explain)

GeForce GT 220 GDDR3 32384 MB/sec
GeForce GT 320 25280 MB/sec
Difference: 7104 (28%)

Texel Rate

The GeForce GT 320 should be a lot (more or less 30%) more effective at AF than the GeForce GT 220 GDDR3. (explain)

GeForce GT 320 12960 Mtexels/sec
GeForce GT 220 GDDR3 10000 Mtexels/sec
Difference: 2960 (30%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GT 220 GDDR3 is the winner, not by a very large margin though. (explain)

GeForce GT 220 GDDR3 5000 Mpixels/sec
GeForce GT 320 4320 Mpixels/sec
Difference: 680 (16%)

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.

Price Comparison

Display Prices

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GeForce GT 220 GDDR3

Amazon.com

GeForce GT 320

Amazon.com

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 GeForce GT 320
Manufacturer nVidia nVidia
Year October 2009 February 2010
Code Name GT216 GT215
Memory 512 MB 1024 MB
Core Speed 625 MHz 540 MHz
Memory Speed 2024 MHz 1580 MHz
Power (Max TDP) 58 watts 43 watts
Bandwidth 32384 MB/sec 25280 MB/sec
Texel Rate 10000 Mtexels/sec 12960 Mtexels/sec
Pixel Rate 5000 Mpixels/sec 4320 Mpixels/sec
Unified Shaders 48 72
Texture Mapping Units 16 24
Render Output Units 8 8
Bus Type GDDR3 GDDR3
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 486 million 727 million
Bus PCIe 2.0 PCIe x16
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.2 OpenGL 3.3

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 per second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the 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 amount of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GT 220 GDDR3

Amazon.com

GeForce GT 320

Amazon.com

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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