Radeon HD 4670 1GB vs Radeon R9 280X

Intro

Compare those specs to the Radeon R9 280X, which comes with clock speeds of 850 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 RAM. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 1GB		70 Watts
Radeon R9 280X		250 Watts
	Difference: 180 Watts (257%)

Memory Bandwidth

The Radeon R9 280X should in theory be much faster than the Radeon HD 4670 1GB overall. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 252800 (718%)

Texel Rate

The Radeon R9 280X will be quite a bit (about 353%) more effective at AF than the Radeon HD 4670 1GB. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 84800 (353%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 280X is the winner, by far. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 4670 1GB		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: Bandwidth is the maximum amount of information (counted in MB per second) that can be transported across 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 RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.