Radeon HD 6670 (OEM) vs Radeon HD 7970

Intro

Compare those specifications to the Radeon HD 7970, which makes use of a 28 nm design. AMD has clocked the core frequency at 925 MHz. The GDDR5 RAM works at a frequency of 1375 MHz on this particular card. It features 2048 SPUs along with 128 Texture Address Units and 32 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 7970		8225 points
Radeon HD 6670 (OEM)		1120 points
	Difference: 7105 (634%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM)		63 Watts
Radeon HD 7970		250 Watts
	Difference: 187 Watts (297%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7970 should in theory be a lot superior to the Radeon HD 6670 (OEM) in general. (explain)

Radeon HD 7970		264000 MB/sec
Radeon HD 6670 (OEM)		64000 MB/sec
	Difference: 200000 (313%)

Texel Rate

The Radeon HD 7970 will be a lot (approximately 517%) better at AF than the Radeon HD 6670 (OEM). (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon HD 6670 (OEM)		19200 Mtexels/sec
	Difference: 99200 (517%)

Pixel Rate

The Radeon HD 7970 should be a lot (about 363%) more effective at full screen anti-aliasing than the Radeon HD 6670 (OEM), and also should be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 7970		29600 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 23200 (363%)

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 largest amount of information (in units of MB per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 amount of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, 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 card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.