Geforce GTX 770 vs Radeon HD 7790

Intro

Compare those specs to the Radeon HD 7790, which comes with a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 RAM running at 1500 MHz through a 128-bit bus. It also is made up of 896 SPUs, 56 Texture Address Units, and 16 Raster Operation 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 770		7854 points
Radeon HD 7790		4330 points
	Difference: 3524 (81%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Geforce GTX 770		230 Watts
	Difference: 145 Watts (171%)

Memory Bandwidth

Performance-wise, the Geforce GTX 770 should in theory be much superior to the Radeon HD 7790 in general. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 128384 (134%)

Texel Rate

The Geforce GTX 770 should be a lot (about 139%) more effective at AF than the Radeon HD 7790. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 77888 (139%)

Pixel Rate

The Geforce GTX 770 will be a lot (approximately 109%) faster with regards to full screen anti-aliasing than the Radeon HD 7790, and should be capable of handling higher resolutions more effectively. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 17472 (109%)

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 (counted in megabytes per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 are processed per second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.