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GeForce GT 220 GDDR3 vs GeForce GTS 450 1GB


Intro

The GeForce GT 220 GDDR3 has a GPU clock speed of 625 MHz, and the 512 MB of GDDR3 memory runs at 1012 MHz through a 128-bit bus. It also features 48 Stream Processors, 16 Texture Address Units, 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 memory is set to run at a frequency of 902 MHz on this particular model. It features 192 SPUs as well as 32 TAUs and 16 ROPs.

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 speaking, the GeForce GTS 450 1GB should be much 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 a lot (approximately 151%) faster with regards to AF 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 quite a bit (approximately 151%) faster with regards to FSAA than the GeForce GT 220 GDDR3, and also will be capable of handling higher screen resolutions while still performing well. (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

GeForce GT 220 GDDR3

GeForce GTS 450 1GB

Specifications

Display 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: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's 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 are processed in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

GeForce GT 220 GDDR3

GeForce GTS 450 1GB

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