Radeon HD 6670 (OEM) vs Radeon HD 6870

Intro

Compare all of that to the Radeon HD 6870, which features core clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 1120 SPUs along with 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

Theoretically speaking, the Radeon HD 6870 should perform quite a bit 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 will be quite a bit (approximately 163%) more effective 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 screen resolution is important to you, then the Radeon HD 6870 is superior to the Radeon HD 6670 (OEM), and very much so. (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 maximum amount of information (counted in MB per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.