GeForce GT 220 GDDR3 vs GeForce GTS 150

Intro

Compare all of that to the GeForce GTS 150, which comes with a clock speed of 740 MHz and a GDDR3 memory speed of 500 MHz. It also makes use of a 256-bit memory bus, and makes use of a 55 nm design. It features 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

The GeForce GT 220 GDDR3 should in theory be a small bit faster than the GeForce GTS 150 overall. (explain)

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

Texel Rate

The GeForce GTS 150 should be much (approximately 374%) faster with regards to AF 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 a lot (more or less 137%) better at full screen anti-aliasing than the GeForce GT 220 GDDR3, and capable of handling higher screen 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 maximum amount of data (in units of MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at 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 video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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 get to the max fill rate.