GeForce GT 340 1GB vs Radeon HD 6770 1GB

Intro

Compare all that to the Radeon HD 6770 1GB, which has a clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It features 800 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

As far as performance goes, the Radeon HD 6770 1GB should theoretically be a lot better than the GeForce GT 340 1GB in general. (explain)

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

Texel Rate

The Radeon HD 6770 1GB should be quite a bit (approximately 105%) faster with regards to AF than the GeForce GT 340 1GB. (explain)

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

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6770 1GB is a better choice, by far. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce GT 340 1GB		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 maximum amount of information (counted in megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 processed in one second. This number is worked out by multiplying the total number of 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. 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 lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.