Radeon HD 7790 vs Radeon R9 390X 8G

Intro

Compare those specs to the Radeon R9 390X 8G, which has core speeds of 1050 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 memory. It features 2816 SPUs as well as 176 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 390X 8G		13555 points
Radeon HD 7790		4330 points
	Difference: 9225 (213%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 190 Watts (224%)

Memory Bandwidth

The Radeon R9 390X 8G should theoretically be much faster than the Radeon HD 7790 in general. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 288000 (300%)

Texel Rate

The Radeon R9 390X 8G will be a lot (more or less 230%) better at anisotropic filtering than the Radeon HD 7790. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 128800 (230%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 390X 8G is superior to the Radeon HD 7790, by far. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon HD 7790		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: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the 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 texture map elements (texels) that can be processed in one second. This number is calculated 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of 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.