Geforce GTX 690 vs Radeon HD 6770 1GB

Intro

Compare all that to the Radeon HD 6770 1GB, which has core speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
Geforce GTX 690		300 Watts
	Difference: 192 Watts (178%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 690 should theoretically be quite a bit superior to the Radeon HD 6770 1GB in general. (explain)

Geforce GTX 690		384512 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 317312 (472%)

Texel Rate

The Geforce GTX 690 is quite a bit (more or less 551%) faster with regards to AF than the Radeon HD 6770 1GB. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 198240 (551%)

Pixel Rate

If using a high screen resolution is important to you, then the Geforce GTX 690 is the winner, and very much so. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 44160 (307%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it must 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 anti-aliasing, 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 number of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock 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 fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.