Radeon HD 7770 vs Radeon R9 390X 8G

Intro

Compare all of that to the Radeon R9 390X 8G, which has clock speeds of 1050 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2816 SPUs along with 176 TAUs and 64 Rasterization Operator Units.

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 7770		3180 points
	Difference: 10375 (326%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 195 Watts (244%)

Memory Bandwidth

The Radeon R9 390X 8G should theoretically be a lot faster than the Radeon HD 7770 overall. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 312000 (433%)

Texel Rate

The Radeon R9 390X 8G is quite a bit (approximately 362%) more effective at texture filtering than the Radeon HD 7770. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 144800 (362%)

Pixel Rate

The Radeon R9 390X 8G will be much (approximately 320%) better at FSAA than the Radeon HD 7770, and also will be able to handle higher resolutions more effectively. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 51200 (320%)

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 (in units of megabytes per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the bus width by its memory 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 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 number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.