Radeon HD 4750 vs Radeon R9 M265X

Intro

Compare all of that to the Radeon R9 M265X, which has a clock speed of 575 MHz and a GDDR5 memory frequency of 1125 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M265X should in theory be much faster than the Radeon HD 4750 in general. (explain)

Radeon R9 M265X		72000 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 20800 (41%)

Texel Rate

The Radeon HD 4750 should be a bit (approximately 2%) more effective at AF than the Radeon R9 M265X. (explain)

Radeon HD 4750		23360 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 360 (2%)

Pixel Rate

The Radeon HD 4750 is a lot (approximately 27%) more effective at full screen anti-aliasing than the Radeon R9 M265X, and able to handle higher resolutions better. (explain)

Radeon HD 4750		11680 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 2480 (27%)

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 maximum amount of data (measured in MB per second) that can be moved across the external memory interface within a second. It is worked out 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 it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.