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GeForce GT 220 GDDR3 vs GeForce GTS 450 1GB

Intro

The GeForce GT 220 GDDR3 has clock speeds of 625 MHz on the GPU, and 1012 MHz on the 512 MB of GDDR3 RAM. It features 48 SPUs as well as 16 TAUs and 8 Rasterization Operator Units.

Compare those specifications to the GeForce GTS 450 1GB, which has a GPU core clock speed of 783 MHz, and 1024 MB of GDDR5 memory running at 902 MHz through a 128-bit bus. It also is comprised of 192 SPUs, 32 Texture Address Units, 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 is 78% quicker than the GeForce GT 220 GDDR3 overall, because of its higher data rate. (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 should be quite a bit (about 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 much (about 151%) more effective at full screen anti-aliasing than the GeForce GT 220 GDDR3, and also able to handle higher resolutions without slowing down too much. (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 information (in units of MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

GeForce GT 220 GDDR3

GeForce GTS 450 1GB

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