GeForce GT 340 vs GeForce GTS 450 1GB

Intro

Compare those specifications to the GeForce GTS 450 1GB, which features a clock frequency of 783 MHz and a GDDR5 memory speed of 902 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It is made up of 192 SPUs, 32 TAUs, 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

Theoretically speaking, the GeForce GTS 450 1GB will be 6% quicker than the GeForce GT 340 in general, because of its higher bandwidth. (explain)

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

Texel Rate

The GeForce GTS 450 1GB should be a lot (approximately 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

If running with high levels of AA is important to you, then the GeForce GTS 450 1GB is superior to the GeForce GT 340, by far. (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 maximum amount of information (measured in megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 applied in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at 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 per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.