Radeon HD 6770 1GB vs Radeon R9 280

Intro

Compare all that to the Radeon R9 280, which uses a 28 nm design. AMD has clocked the core speed at 933 MHz. The GDDR5 RAM is set to run at a speed of 1250 MHz on this particular card. It features 1792 SPUs as well as 112 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
Radeon R9 280		250 Watts
	Difference: 142 Watts (131%)

Memory Bandwidth

As far as performance goes, the Radeon R9 280 should in theory be much better than the Radeon HD 6770 1GB overall. (explain)

Radeon R9 280		240000 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 172800 (257%)

Texel Rate

The Radeon R9 280 should be quite a bit (more or less 190%) more effective at texture filtering than the Radeon HD 6770 1GB. (explain)

Radeon R9 280		104496 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 68496 (190%)

Pixel Rate

The Radeon R9 280 will be much (more or less 107%) more effective at AA than the Radeon HD 6770 1GB, and also able to handle higher screen resolutions more effectively. (explain)

Radeon R9 280		29856 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 15456 (107%)

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: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.