GeForce GT 220 GDDR3 vs GeForce GTS 150

Intro

Compare all of that to the GeForce GTS 150, which features a core clock speed of 740 MHz and a GDDR3 memory frequency of 500 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It is made up of 128 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
GeForce GTS 150		141 Watts
	Difference: 83 Watts (143%)

Memory Bandwidth

As far as performance goes, the GeForce GT 220 GDDR3 should in theory be just a bit superior to the GeForce GTS 150 in general. (explain)

GeForce GT 220 GDDR3		32384 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 384 (1%)

Texel Rate

The GeForce GTS 150 will be quite a bit (approximately 374%) more effective at anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

GeForce GTS 150		47360 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 37360 (374%)

Pixel Rate

The GeForce GTS 150 is much (more or less 137%) better at anti-aliasing than the GeForce GT 220 GDDR3, and able to handle higher resolutions better. (explain)

GeForce GTS 150		11840 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 6840 (137%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the 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 amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the 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 maximum amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.