Radeon HD 6670 (OEM) 1GB vs Radeon R9 285

Intro

Compare those specs to the Radeon R9 285, which comes with GPU clock speed of 918 MHz, and 2048 MB of GDDR5 RAM running at 1375 MHz through a 256-bit bus. It also features 1792 Stream Processors, 112 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB		63 Watts
Radeon R9 285		190 Watts
	Difference: 127 Watts (202%)

Memory Bandwidth

The Radeon R9 285, in theory, should be a lot faster than the Radeon HD 6670 (OEM) 1GB in general. (explain)

Radeon R9 285		176000 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 112000 (175%)

Texel Rate

The Radeon R9 285 is quite a bit (approximately 436%) faster with regards to AF than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 83616 (436%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 285 is superior to the Radeon HD 6670 (OEM) 1GB, by far. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 22976 (359%)

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 (in units of megabytes per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.