Radeon HD 4750 vs Radeon R9 280X

Intro

Compare that to the Radeon R9 280X, which has core clock speeds of 850 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
Radeon R9 280X		250 Watts
	Difference: 175 Watts (233%)

Memory Bandwidth

The Radeon R9 280X should theoretically be quite a bit faster than the Radeon HD 4750 in general. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 236800 (463%)

Texel Rate

The Radeon R9 280X is much (more or less 366%) better at AF than the Radeon HD 4750. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 85440 (366%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 280X is superior to the Radeon HD 4750, and very much so. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 15520 (133%)

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 data (in units of megabytes per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed 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 this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip 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 colour 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 rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.