GeForce GT 340 vs GeForce GTS 150

Intro

Compare all of that to the GeForce GTS 150, which makes use of a 55 nm design. nVidia has clocked the core frequency at 740 MHz. The GDDR3 RAM runs at a speed of 500 MHz on this particular card. It features 128 SPUs along with 64 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

As far as performance goes, the GeForce GT 340 should in theory be much better than the GeForce GTS 150 in general. (explain)

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

Texel Rate

The GeForce GTS 150 will be a lot (more or less 169%) faster with regards to anisotropic filtering than the GeForce GT 340. (explain)

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

Pixel Rate

The GeForce GTS 150 is a lot (more or less 169%) more effective at FSAA than the GeForce GT 340, and able to handle higher resolutions better. (explain)

GeForce GTS 150		11840 Mpixels/sec
GeForce GT 340		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 max amount of information (measured in MB per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core clock 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 maximum amount of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.