Radeon HD 6670 (OEM) vs Radeon HD 6870

Intro

Compare those specs to the Radeon HD 6870, which comes with GPU core speed of 900 MHz, and 1024 MB of GDDR5 RAM set to run at 1050 MHz through a 256-bit bus. It also is comprised of 1120 Stream Processors, 56 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 6870		2870 points
Radeon HD 6670 (OEM)		1120 points
	Difference: 1750 (156%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM)		63 Watts
Radeon HD 6870		151 Watts
	Difference: 88 Watts (140%)

Memory Bandwidth

The Radeon HD 6870 should theoretically be much faster than the Radeon HD 6670 (OEM) overall. (explain)

Radeon HD 6870		134400 MB/sec
Radeon HD 6670 (OEM)		64000 MB/sec
	Difference: 70400 (110%)

Texel Rate

The Radeon HD 6870 is a lot (about 163%) better at texture filtering than the Radeon HD 6670 (OEM). (explain)

Radeon HD 6870		50400 Mtexels/sec
Radeon HD 6670 (OEM)		19200 Mtexels/sec
	Difference: 31200 (163%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6870 is superior to the Radeon HD 6670 (OEM), by a large margin. (explain)

Radeon HD 6870		28800 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 22400 (350%)

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 information (measured in megabytes per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 amount of texture map elements (texels) that can be processed in one 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs 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 also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.