Radeon HD 6770 1GB vs Radeon R9 270X

Intro

Compare those specifications to the Radeon R9 270X, which features a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1400 MHz. It also makes use of a 256-bit bus, and uses a 28 nm design. It is comprised of 1280 SPUs, 80 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
Radeon R9 270X		180 Watts
	Difference: 72 Watts (67%)

Memory Bandwidth

The Radeon R9 270X, in theory, should be much faster than the Radeon HD 6770 1GB overall. (explain)

Radeon R9 270X		179200 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 112000 (167%)

Texel Rate

The Radeon R9 270X will be a lot (about 122%) faster with regards to AF than the Radeon HD 6770 1GB. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 44000 (122%)

Pixel Rate

The Radeon R9 270X will be much (about 122%) better at AA than the Radeon HD 6770 1GB, and will be capable of handling higher resolutions more effectively. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 17600 (122%)

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 (counted in megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total texture units by the core 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its 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 - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.