Radeon HD 4670 512MB vs Radeon R9 280X

Intro

Compare all that to the Radeon R9 280X, which has clock speeds of 850 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 RAM. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
Radeon R9 280X		250 Watts
	Difference: 180 Watts (257%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 280X is 800% quicker than the Radeon HD 4670 512MB overall, because of its higher data rate. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 256000 (800%)

Texel Rate

The Radeon R9 280X is quite a bit (more or less 353%) faster with regards to AF than the Radeon HD 4670 512MB. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 84800 (353%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 280X is superior to the Radeon HD 4670 512MB, by a large margin. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 21200 (353%)

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 maximum amount of information (in units of MB per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.