GeForce GT 340 vs GeForce GTX 650

Intro

Compare all that to the GeForce GTX 650, which comes with GPU core speed of 1058 MHz, and 1024 MB of GDDR5 memory set to run at 1250 MHz through a 128-bit bus. It also is comprised of 384 Stream Processors, 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

The GeForce GTX 650, in theory, should be much faster than 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 anisotropic filtering than the GeForce GT 340. (explain)

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

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 650 is superior to the GeForce GT 340, and very much so. (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 max amount of information (measured in MB per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.