GeForce GT 340 vs Radeon HD 6770 1GB

Intro

Compare those specs to the Radeon HD 6770 1GB, which features GPU core speed of 900 MHz, and 1024 MB of GDDR5 memory set to run at 1050 MHz through a 128-bit bus. It also is made up of 800 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 39 Watts (57%)

Memory Bandwidth

The Radeon HD 6770 1GB should in theory be much faster than the GeForce GT 340 overall. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 12800 (24%)

Texel Rate

The Radeon HD 6770 1GB will be much (approximately 105%) faster with regards to anisotropic filtering than the GeForce GT 340. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 18400 (105%)

Pixel Rate

The Radeon HD 6770 1GB should be much (approximately 227%) faster with regards to AA than the GeForce GT 340, and will be able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 10000 (227%)

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 largest amount of information (in units of megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total 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 in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.