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Radeon HD 6570 (OEM) 2GB vs Radeon R9 M275X

Intro

The Radeon HD 6570 (OEM) 2GB has a clock speed of 650 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 480 SPUs, 24 Texture Address Units, and 8 ROPs.

Compare those specifications to the Radeon R9 M275X, which features a clock frequency of 900 MHz and a GDDR5 memory speed of 1125 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Performance-wise, the Radeon R9 M275X should theoretically be a little bit superior to the Radeon HD 6570 (OEM) 2GB overall. (explain)

Radeon R9 M275X		72000 MB/sec
Radeon HD 6570 (OEM) 2GB		64000 MB/sec
	Difference: 8000 (13%)

Texel Rate

The Radeon R9 M275X should be a lot (about 131%) faster with regards to AF than the Radeon HD 6570 (OEM) 2GB. (explain)

Radeon R9 M275X		36000 Mtexels/sec
Radeon HD 6570 (OEM) 2GB		15600 Mtexels/sec
	Difference: 20400 (131%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 M275X is a better choice, by far. (explain)

Radeon R9 M275X		14400 Mpixels/sec
Radeon HD 6570 (OEM) 2GB		5200 Mpixels/sec
	Difference: 9200 (177%)

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

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Radeon HD 6570 (OEM) 2GB

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Radeon R9 M275X

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model	Radeon HD 6570 (OEM) 2GB	Radeon R9 M275X
Manufacturer	AMD	AMD
Year	February 2011	May 1 2014
Code Name	Turks	Venus XTX
Memory	1024 MB	2048 MB
Core Speed	650 MHz	900 MHz
Memory Speed	4000 MHz	4500 MHz
Power (Max TDP)	50 watts	50 watts
Bandwidth	64000 MB/sec	72000 MB/sec
Texel Rate	15600 Mtexels/sec	36000 Mtexels/sec
Pixel Rate	5200 Mpixels/sec	14400 Mpixels/sec
Unified Shaders	480	640
Texture Mapping Units	24	40
Render Output Units	8	16
Bus Type	GDDR5	GDDR5
Bus Width	128-bit	128-bit
Fab Process	40 nm	28 nm
Transistors	715 million	(Unknown) million
Bus	PCIe 2.1 x16	PCIe 3.0 x16
DirectX Version	DirectX 11	DirectX 11.2
OpenGL Version	OpenGL 4.1	OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better 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 texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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

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