Radeon HD 6670 (OEM) 1GB vs Radeon R9 295X2

Intro

Compare all that to the Radeon R9 295X2, which has clock speeds of 1018 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2816 SPUs along with 176 Texture Address Units and 64 Rasterization Operator 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 295X2		500 Watts
	Difference: 437 Watts (694%)

Memory Bandwidth

The Radeon R9 295X2, in theory, should be quite a bit faster than the Radeon HD 6670 (OEM) 1GB overall. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 576000 (900%)

Texel Rate

The Radeon R9 295X2 is a lot (about 1766%) more effective at AF than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 339136 (1766%)

Pixel Rate

The Radeon R9 295X2 will be a lot (more or less 1936%) better at AA than the Radeon HD 6670 (OEM) 1GB, and will be able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 123904 (1936%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 texture map elements (texels) that are applied in one second. This figure 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 graphics 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 most pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few 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.