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GeForce GTX 750 vs Radeon HD 6770 1GB

Intro

The GeForce GTX 750 has a core clock frequency of 1020 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It features 512 SPUs, 32 TAUs, and 16 ROPs.

Compare that to the Radeon HD 6770 1GB, which comes with a core clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It is comprised of 800 SPUs, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750		55 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 53 Watts (96%)

Memory Bandwidth

In theory, the GeForce GTX 750 is 19% quicker than the Radeon HD 6770 1GB overall, due to its greater data rate. (explain)

GeForce GTX 750		80000 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 12800 (19%)

Texel Rate

The Radeon HD 6770 1GB should be a bit (approximately 10%) faster with regards to texture filtering than the GeForce GTX 750. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce GTX 750		32640 Mtexels/sec
	Difference: 3360 (10%)

Pixel Rate

The GeForce GTX 750 is just a bit (more or less 13%) faster with regards to anti-aliasing than the Radeon HD 6770 1GB, and also should be able to handle higher resolutions more effectively. (explain)

GeForce GTX 750		16320 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 1920 (13%)

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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GeForce GTX 750

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Radeon HD 6770 1GB

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Specifications

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Model	GeForce GTX 750	Radeon HD 6770 1GB
Manufacturer	nVidia	AMD
Year	February 2014	January 2011
Code Name	GM107	Juniper XT
Memory	1024 MB	1024 MB
Core Speed	1020 MHz	900 MHz
Memory Speed	5000 MHz	4200 MHz
Power (Max TDP)	55 watts	108 watts
Bandwidth	80000 MB/sec	67200 MB/sec
Texel Rate	32640 Mtexels/sec	36000 Mtexels/sec
Pixel Rate	16320 Mpixels/sec	14400 Mpixels/sec
Unified Shaders	512	800
Texture Mapping Units	32	40
Render Output Units	16	16
Bus Type	GDDR5	GDDR5
Bus Width	128-bit	128-bit
Fab Process	28 nm	40 nm
Transistors	1870 million	1040 million
Bus	PCIe 3.0 x16	PCIe x16
DirectX Version	DirectX 11.0	DirectX 11
OpenGL Version	OpenGL 4.4	OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 are processed in one second. This number is calculated by multiplying the total 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 the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to 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 maximum fill rate.

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