Radeon HD 4670 1GB vs Radeon R9 M265X

Intro

Compare those specs to the Radeon R9 M265X, which comes with a core clock frequency of 575 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R9 M265X should in theory be much superior to the Radeon HD 4670 1GB in general. (explain)

Radeon R9 M265X		72000 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 36800 (105%)

Texel Rate

The Radeon HD 4670 1GB is a little bit (about 4%) faster with regards to AF than the Radeon R9 M265X. (explain)

Radeon HD 4670 1GB		24000 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 1000 (4%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 M265X is a better choice, and very much so. (explain)

Radeon R9 M265X		9200 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 3200 (53%)

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 (in units of megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 are applied 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 graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core 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 also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.