Radeon HD 6670 (OEM) 1GB vs Radeon R7 240

Intro

Compare those specs to the Radeon R7 240, which uses a 28 nm design. AMD has clocked the core speed at 730 MHz. The DDR3 memory is set to run at a frequency of 900 MHz on this particular model. It features 320 SPUs along with 20 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon HD 6670 (OEM) 1GB		63 Watts
	Difference: 33 Watts (110%)

Memory Bandwidth

The Radeon HD 6670 (OEM) 1GB, in theory, should perform quite a bit faster than the Radeon R7 240 overall. (explain)

Radeon HD 6670 (OEM) 1GB		64000 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 35200 (122%)

Texel Rate

The Radeon HD 6670 (OEM) 1GB is a lot (more or less 32%) more effective at anisotropic filtering than the Radeon R7 240. (explain)

Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 4600 (32%)

Pixel Rate

The Radeon HD 6670 (OEM) 1GB should be a small bit (about 10%) more effective at AA than the Radeon R7 240, and will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 560 (10%)

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 data (counted in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.