Geforce GTX 670 vs Radeon HD 7790

Intro

Compare that to the Radeon HD 7790, which has GPU 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 Stream Processors, 56 Texture Address Units, and 16 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

Geforce GTX 670		7351 points
Radeon HD 7790		4330 points
	Difference: 3021 (70%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Geforce GTX 670		170 Watts
	Difference: 85 Watts (100%)

Memory Bandwidth

In theory, the Geforce GTX 670 should perform quite a bit faster than the Radeon HD 7790 in general. (explain)

Geforce GTX 670		192000 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 96000 (100%)

Texel Rate

The Geforce GTX 670 is a lot (about 83%) more effective at anisotropic filtering than the Radeon HD 7790. (explain)

Geforce GTX 670		102480 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 46480 (83%)

Pixel Rate

The Geforce GTX 670 is much (approximately 83%) more effective at AA than the Radeon HD 7790, and also will be capable of handling higher resolutions better. (explain)

Geforce GTX 670		29280 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 13280 (83%)

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 max amount of data (counted in MB per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 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 high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at 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 the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.