GeForce GTX 1080 vs Radeon HD 7790

Intro

Compare all of that to the Radeon HD 7790, which makes use of a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM runs at a frequency of 1500 MHz on this particular model. It features 896 SPUs along with 56 Texture Address Units and 16 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

GeForce GTX 1080		21942 points
Radeon HD 7790		4330 points
	Difference: 17612 (407%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
GeForce GTX 1080		180 Watts
	Difference: 95 Watts (112%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 1080 should theoretically be quite a bit better than the Radeon HD 7790 overall. (explain)

GeForce GTX 1080		327680 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 231680 (241%)

Texel Rate

The GeForce GTX 1080 will be quite a bit (approximately 359%) better at texture filtering than the Radeon HD 7790. (explain)

GeForce GTX 1080		257120 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 201120 (359%)

Pixel Rate

The GeForce GTX 1080 is quite a bit (approximately 543%) faster with regards to anti-aliasing than the Radeon HD 7790, and able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 1080		102848 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 86848 (543%)

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 megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the video 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 maximum amount of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units 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 rate is also dependant 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.