GeForce GT 340 1GB vs Radeon HD 3690/3830

Intro

Compare that to the Radeon HD 3690/3830, which has a GPU core clock speed of 668 MHz, and 256 MB of GDDR3 memory set to run at 828 MHz through a 128-bit bus. It also is comprised of 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
Radeon HD 3690/3830		75 Watts
	Difference: 6 Watts (9%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 340 1GB should be 105% faster than the Radeon HD 3690/3830 in general, because of its higher data rate. (explain)

GeForce GT 340 1GB		54400 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 27904 (105%)

Texel Rate

The GeForce GT 340 1GB should be a lot (more or less 65%) faster with regards to AF than the Radeon HD 3690/3830. (explain)

GeForce GT 340 1GB		17600 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 6912 (65%)

Pixel Rate

The Radeon HD 3690/3830 is a lot (about 143%) more effective at FSAA than the GeForce GT 340 1GB, and also should be able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 3690/3830		10688 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 6288 (143%)

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 (in units of megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If 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 amount of texture map elements (texels) that are processed in one second. This figure 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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