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GeForce GT 220 GDDR3 vs GeForce GTS 450 1GB

Intro

The GeForce GT 220 GDDR3 features a GPU clock speed of 625 MHz, and the 512 MB of GDDR3 memory is set to run at 1012 MHz through a 128-bit bus. It also is made up of 48 Stream Processors, 16 TAUs, and 8 Raster Operation Units.

Compare those specs to the GeForce GTS 450 1GB, which uses a 40 nm design. nVidia has set the core speed at 783 MHz. The GDDR5 RAM is set to run at a frequency of 902 MHz on this model. It features 192 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3 58 Watts
GeForce GTS 450 1GB 106 Watts
Difference: 48 Watts (83%)

Memory Bandwidth

Theoretically, the GeForce GTS 450 1GB should be quite a bit faster than the GeForce GT 220 GDDR3 overall. (explain)

GeForce GTS 450 1GB 57728 MB/sec
GeForce GT 220 GDDR3 32384 MB/sec
Difference: 25344 (78%)

Texel Rate

The GeForce GTS 450 1GB will be quite a bit (about 151%) more effective at anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

GeForce GTS 450 1GB 25056 Mtexels/sec
GeForce GT 220 GDDR3 10000 Mtexels/sec
Difference: 15056 (151%)

Pixel Rate

The GeForce GTS 450 1GB should be much (about 151%) better at full screen anti-aliasing than the GeForce GT 220 GDDR3, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTS 450 1GB 12528 Mpixels/sec
GeForce GT 220 GDDR3 5000 Mpixels/sec
Difference: 7528 (151%)

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 GTS 450 1GB

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 GTS 450 1GB
Manufacturer nVidia nVidia
Year October 2009 September 2010
Code Name GT216 GF106
Memory 512 MB 1024 MB
Core Speed 625 MHz 783 MHz
Memory Speed 2024 MHz 3608 MHz
Power (Max TDP) 58 watts 106 watts
Bandwidth 32384 MB/sec 57728 MB/sec
Texel Rate 10000 Mtexels/sec 25056 Mtexels/sec
Pixel Rate 5000 Mpixels/sec 12528 Mpixels/sec
Unified Shaders 48 192
Texture Mapping Units 16 32
Render Output Units 8 16
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 486 million 1170 million
Bus PCIe 2.0 PCIe x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

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

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