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GeForce GTX 965M vs Radeon HD 5770

Intro

The GeForce GTX 965M features a GPU core speed of 944 MHz, and the 2048 MB of GDDR5 memory is set to run at 1000 MHz through a 128-bit bus. It also features 1024 SPUs, 64 Texture Address Units, and 32 ROPs.

Compare those specs to the Radeon HD 5770, which makes use of a 40 nm design. AMD has set the core frequency at 850 MHz. The GDDR5 RAM is set to run at a frequency of 1200 MHz on this specific card. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
Radeon HD 5770		108 Watts
	Difference: 48 Watts (80%)

Memory Bandwidth

The Radeon HD 5770 should in theory be a little bit faster than the GeForce GTX 965M overall. (explain)

Radeon HD 5770		76800 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 12800 (20%)

Texel Rate

The GeForce GTX 965M is quite a bit (more or less 78%) faster with regards to AF than the Radeon HD 5770. (explain)

GeForce GTX 965M		60416 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 26416 (78%)

Pixel Rate

The GeForce GTX 965M should be much (more or less 122%) faster with regards to FSAA than the Radeon HD 5770, and also capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 16608 (122%)

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 965M

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Radeon HD 5770

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Specifications

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Model	GeForce GTX 965M	Radeon HD 5770
Manufacturer	nVidia	AMD
Year	January 5 2015	October 13, 2009
Code Name	GM204	Juniper XT
Memory	2048 MB	1024 MB
Core Speed	944 MHz	850 MHz
Memory Speed	4000 MHz	4800 MHz
Power (Max TDP)	60 watts	108 watts
Bandwidth	64000 MB/sec	76800 MB/sec
Texel Rate	60416 Mtexels/sec	34000 Mtexels/sec
Pixel Rate	30208 Mpixels/sec	13600 Mpixels/sec
Unified Shaders	1024	800(160x5)
Texture Mapping Units	64	40
Render Output Units	32	16
Bus Type	GDDR5	GDDR5
Bus Width	128-bit	128-bit
Fab Process	28 nm	40 nm
Transistors	(Unknown) million	1040 million
Bus	PCIe 3.0 x16	PCIe 2.1 x16
DirectX Version	DirectX 12	DirectX 11
OpenGL Version	OpenGL 4.5	OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can 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 colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

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