Radeon HD 4670 512MB vs Radeon R9 270X

Intro

Compare all of that to the Radeon R9 270X, which uses a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 memory is set to run at a frequency of 1400 MHz on this particular model. It features 1280 SPUs as well as 80 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
Radeon R9 270X		180 Watts
	Difference: 110 Watts (157%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270X should be quite a bit faster than the Radeon HD 4670 512MB overall. (explain)

Radeon R9 270X		179200 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 147200 (460%)

Texel Rate

The Radeon R9 270X will be quite a bit (about 233%) faster with regards to anisotropic filtering than the Radeon HD 4670 512MB. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 56000 (233%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 270X is a better choice, by far. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 26000 (433%)

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 past the external memory interface in one second. It's 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 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.