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GeForce GTX 965M vs Radeon HD 5770

Intro

The GeForce GTX 965M comes with core clock speeds of 944 MHz on the GPU, and 1000 MHz on the 2048 MB of GDDR5 memory. It features 1024 SPUs along with 64 TAUs and 32 Rasterization Operator Units.

Compare those specifications to the Radeon HD 5770, which has a core clock frequency of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It features 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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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 theoretically be a small 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 a lot (about 78%) better at AF than the Radeon HD 5770. (explain)

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

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 965M is superior to the Radeon HD 5770, and very much so. (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 maximum amount of data (counted in MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. 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 number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock 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 fill rate is also dependant on quite a few other factors, especially 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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