Radeon HD 4750 vs Radeon R9 270X

Intro

Compare those specs to the Radeon R9 270X, which has a core clock speed of 1000 MHz and a GDDR5 memory speed of 1400 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It features 1280 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
Radeon R9 270X		180 Watts
	Difference: 105 Watts (140%)

Memory Bandwidth

Theoretically, the Radeon R9 270X should be quite a bit faster than the Radeon HD 4750 in general. (explain)

Radeon R9 270X		179200 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 128000 (250%)

Texel Rate

The Radeon R9 270X is much (approximately 242%) more effective at anisotropic filtering than the Radeon HD 4750. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 56640 (242%)

Pixel Rate

The Radeon R9 270X will be much (approximately 174%) faster with regards to FSAA than the Radeon HD 4750, and also will be able to handle higher resolutions more effectively. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 20320 (174%)

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 information (in units of MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines 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 fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.