GeForce GT 340 vs Radeon HD 6770

Intro

Compare those specifications to the Radeon HD 6770, which has a clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 128-bit bus, and uses a 40 nm design. It is comprised of 800 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Performance-wise, the Radeon HD 6770 should theoretically be a lot better than the GeForce GT 340 overall. (explain)

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

Texel Rate

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

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

Pixel Rate

The Radeon HD 6770 is a lot (about 227%) better at AA than the GeForce GT 340, and also will be able to handle higher resolutions while still performing well. (explain)

Radeon HD 6770		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 maximum amount of data (counted in MB per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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 get to the max fill rate.