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GeForce GT 220 GDDR3 vs GeForce GT 320

Intro

The GeForce GT 220 GDDR3 features a GPU core clock speed of 625 MHz, and the 512 MB of GDDR3 memory runs at 1012 MHz through a 128-bit bus. It also is made up of 48 SPUs, 16 TAUs, and 8 ROPs.

Compare those specifications to the GeForce GT 320, which features core speeds of 540 MHz on the GPU, and 790 MHz on the 1024 MB of GDDR3 memory. It features 72 SPUs as well as 24 TAUs and 8 ROPs.

Display Graphs

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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

In theory, the GeForce GT 220 GDDR3 should perform much faster than the GeForce GT 320 overall. (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%) better at texture filtering 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

The GeForce GT 220 GDDR3 should be just a bit (more or less 16%) better at anti-aliasing than the GeForce GT 320, and also should be able to handle higher screen resolutions without losing too much performance. (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

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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 largest amount of data (counted in MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

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