Radeon HD 6670 (OEM) 1GB vs Radeon R9 380 4G

Intro

Compare all of that to the Radeon R9 380 4G, which comes with a clock speed of 970 MHz and a GDDR5 memory frequency of 1425 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It features 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB		63 Watts
Radeon R9 380 4G		190 Watts
	Difference: 127 Watts (202%)

Memory Bandwidth

The Radeon R9 380 4G, in theory, should perform much faster than the Radeon HD 6670 (OEM) 1GB overall. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 118400 (185%)

Texel Rate

The Radeon R9 380 4G should be a lot (approximately 466%) faster with regards to texture filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 89440 (466%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 380 4G is superior to the Radeon HD 6670 (OEM) 1GB, by far. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 24640 (385%)

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 information (measured in MB per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, 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 applied in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. 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 quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.