Radeon HD 6770 vs Radeon R9 390 8G

Intro

Compare all of that to the Radeon R9 390 8G, which makes use of a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 memory runs at a frequency of 1500 MHz on this specific model. It features 2560 SPUs along with 160 Texture Address Units and 64 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 390 8G		12733 points
Radeon HD 6770		1520 points
	Difference: 11213 (738%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
Radeon R9 390 8G		275 Watts
	Difference: 167 Watts (155%)

Memory Bandwidth

Performance-wise, the Radeon R9 390 8G should in theory be much better than the Radeon HD 6770 overall. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 316800 (471%)

Texel Rate

The Radeon R9 390 8G should be much (about 344%) more effective at anisotropic filtering than the Radeon HD 6770. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 124000 (344%)

Pixel Rate

The Radeon R9 390 8G should be quite a bit (approximately 344%) faster with regards to anti-aliasing than the Radeon HD 6770, and should be able to handle higher resolutions better. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 49600 (344%)

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 (in units of MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR 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 amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core clock speed. 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 many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.