GeForce GTX 970 vs Radeon HD 6770 1GB

Intro

Compare all of that to the Radeon HD 6770 1GB, which features core clock 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 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
GeForce GTX 970		145 Watts
	Difference: 37 Watts (34%)

Memory Bandwidth

The GeForce GTX 970 should theoretically perform much faster than the Radeon HD 6770 1GB in general. (explain)

GeForce GTX 970		224000 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 156800 (233%)

Texel Rate

The GeForce GTX 970 should be much (more or less 203%) more effective at texture filtering than the Radeon HD 6770 1GB. (explain)

GeForce GTX 970		109200 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 73200 (203%)

Pixel Rate

The GeForce GTX 970 will be much (more or less 367%) more effective at anti-aliasing than the Radeon HD 6770 1GB, and will be able to handle higher screen resolutions better. (explain)

GeForce GTX 970		67200 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 52800 (367%)

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 (in units of megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher 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 amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.