GeForce GT 340 vs GeForce GTS 450 1GB

Intro

Compare those specifications to the GeForce GTS 450 1GB, which makes use of a 40 nm design. nVidia has clocked the core speed at 783 MHz. The GDDR5 memory works at a speed of 902 MHz on this card. It features 192 SPUs as well as 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
GeForce GTS 450 1GB		106 Watts
	Difference: 37 Watts (54%)

Memory Bandwidth

In theory, the GeForce GTS 450 1GB will be 6% faster than the GeForce GT 340 overall, due to its higher data rate. (explain)

GeForce GTS 450 1GB		57728 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 3328 (6%)

Texel Rate

The GeForce GTS 450 1GB will be much (about 42%) more effective at AF than the GeForce GT 340. (explain)

GeForce GTS 450 1GB		25056 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 7456 (42%)

Pixel Rate

The GeForce GTS 450 1GB is much (more or less 185%) faster with regards to full screen anti-aliasing than the GeForce GT 340, and should be able to handle higher screen resolutions more effectively. (explain)

GeForce GTS 450 1GB		12528 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 8128 (185%)

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 max amount of information (measured in MB per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type 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 anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core 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 output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.