GeForce GT 340 1GB vs GeForce GTS 150

Intro

Compare those specifications to the GeForce GTS 150, which comes with core speeds of 740 MHz on the GPU, and 500 MHz on the 1024 MB of GDDR3 memory. It features 128 SPUs as well as 64 Texture Address Units and 16 Rasterization Operator Units.

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

Performance-wise, the GeForce GT 340 1GB should theoretically be quite a bit 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 should be much (more or less 169%) more effective at anisotropic 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 is much (about 169%) better at anti-aliasing than the GeForce GT 340 1GB, and capable of handling higher screen resolutions without losing too much performance. (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: Bandwidth is the largest amount of information (in units of MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen 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 texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. 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 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 maximum fill rate.