Radeon HD 6670 (OEM) vs Radeon HD 7790

Intro

Compare those specs to the Radeon HD 7790, which features core speeds of 1000 MHz on the GPU, and 1500 MHz on the 1024 MB of GDDR5 memory. It features 896 SPUs along with 56 TAUs 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

Radeon HD 7790		4330 points
Radeon HD 6670 (OEM)		1120 points
	Difference: 3210 (287%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM)		63 Watts
Radeon HD 7790		85 Watts
	Difference: 22 Watts (35%)

Memory Bandwidth

The Radeon HD 7790 should theoretically be much faster than the Radeon HD 6670 (OEM) in general. (explain)

Radeon HD 7790		96000 MB/sec
Radeon HD 6670 (OEM)		64000 MB/sec
	Difference: 32000 (50%)

Texel Rate

The Radeon HD 7790 is quite a bit (more or less 192%) faster with regards to anisotropic filtering than the Radeon HD 6670 (OEM). (explain)

Radeon HD 7790		56000 Mtexels/sec
Radeon HD 6670 (OEM)		19200 Mtexels/sec
	Difference: 36800 (192%)

Pixel Rate

The Radeon HD 7790 will be much (approximately 150%) more effective at full screen anti-aliasing than the Radeon HD 6670 (OEM), and also capable of handling higher resolutions while still performing well. (explain)

Radeon HD 7790		16000 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 9600 (150%)

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 largest amount of data (measured in megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total texture units by the core 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.