GeForce GT 340 vs GeForce GTX 650

Intro

Compare all of that to the GeForce GTX 650, which has a clock frequency of 1058 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is made up of 384 SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GT 340		69 Watts
	Difference: 5 Watts (8%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 650 should in theory be quite a bit superior to the GeForce GT 340 in general. (explain)

GeForce GTX 650		80000 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 25600 (47%)

Texel Rate

The GeForce GTX 650 should be much (approximately 92%) more effective at texture filtering than the GeForce GT 340. (explain)

GeForce GTX 650		33856 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 16256 (92%)

Pixel Rate

The GeForce GTX 650 will be a lot (approximately 285%) faster with regards to full screen anti-aliasing than the GeForce GT 340, and should be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 12528 (285%)

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 data (counted in MB per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, 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 maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.