GeForce GT 340 1GB vs GeForce GTS 150

Intro

Compare all of that to the GeForce GTS 150, which uses a 55 nm design. nVidia has clocked the core frequency at 740 MHz. The GDDR3 memory works at a frequency of 500 MHz on this model. It features 128 SPUs along with 64 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
GeForce GTS 150		141 Watts
	Difference: 72 Watts (104%)

Memory Bandwidth

As far as performance goes, the GeForce GT 340 1GB should theoretically be a lot better than the GeForce GTS 150 in general. (explain)

GeForce GT 340 1GB		54400 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 22400 (70%)

Texel Rate

The GeForce GTS 150 is quite a bit (more or less 169%) better at texture filtering than the GeForce GT 340 1GB. (explain)

GeForce GTS 150		47360 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 29760 (169%)

Pixel Rate

The GeForce GTS 150 will be much (about 169%) faster with regards to full screen anti-aliasing than the GeForce GT 340 1GB, and will be capable of handling higher screen resolutions better. (explain)

GeForce GTS 150		11840 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 7440 (169%)

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 information (counted in megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better 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 write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.