GeForce GT 340 1GB vs GeForce GTS 450

Intro

Compare those specifications to the GeForce GTS 450, which comes with core clock speeds of 783 MHz on the GPU, and 902 MHz on the 512 MB of GDDR5 memory. It features 192 SPUs as well as 32 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 450		106 Watts
	Difference: 37 Watts (54%)

Memory Bandwidth

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

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

Texel Rate

The GeForce GTS 450 will be much (more or less 42%) more effective at anisotropic filtering than the GeForce GT 340 1GB. (explain)

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

Pixel Rate

The GeForce GTS 450 should be a lot (approximately 185%) faster with regards to FSAA than the GeForce GT 340 1GB, and also capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTS 450		12528 Mpixels/sec
GeForce GT 340 1GB		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: Memory bandwidth is the max amount of information (measured in MB per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 can be processed per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.