GeForce GT 340 1GB vs GeForce GTX 580

Intro

Compare all of that to the GeForce GTX 580, which features a clock frequency of 772 MHz and a GDDR5 memory speed of 1002 MHz. It also features a 384-bit memory bus, and uses a 40 nm design. It is comprised of 512 SPUs, 64 Texture Address Units, and 48 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
GeForce GTX 580		244 Watts
	Difference: 175 Watts (254%)

Memory Bandwidth

In theory, the GeForce GTX 580 should perform quite a bit faster than the GeForce GT 340 1GB in general. (explain)

GeForce GTX 580		192384 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 137984 (254%)

Texel Rate

The GeForce GTX 580 is much (more or less 181%) faster with regards to texture filtering than the GeForce GT 340 1GB. (explain)

GeForce GTX 580		49408 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 31808 (181%)

Pixel Rate

The GeForce GTX 580 will be a lot (more or less 742%) faster with regards to full screen anti-aliasing than the GeForce GT 340 1GB, and will be able to handle higher screen resolutions better. (explain)

GeForce GTX 580		37056 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 32656 (742%)

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 data (measured in MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of 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 rate is also dependant on lots of 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.