GeForce GT 340 vs GeForce GTS 450

Intro

Compare those specs 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 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the GeForce GTS 450 should perform a bit faster than the GeForce GT 340 in general. (explain)

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

Texel Rate

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

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

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTS 450 is a better choice, by a large margin. (explain)

GeForce GTS 450		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: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output 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.