Radeon HD 6770 vs Radeon R9 390X 8G

Intro

Compare those specifications to the Radeon R9 390X 8G, which features a clock frequency of 1050 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 512-bit bus, and makes use of a 28 nm design. It is made up of 2816 SPUs, 176 TAUs, 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 390X 8G		13555 points
Radeon HD 6770		1520 points
	Difference: 12035 (792%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The Radeon R9 390X 8G should theoretically be much faster than the Radeon HD 6770 overall. (explain)

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

Texel Rate

The Radeon R9 390X 8G will be a lot (approximately 413%) more effective at AF than the Radeon HD 6770. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 148800 (413%)

Pixel Rate

The Radeon R9 390X 8G should be quite a bit (more or less 367%) faster with regards to AA than the Radeon HD 6770, and also should be able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon HD 6770		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 (counted in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can 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 Raster Operations Pipelines 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 also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.