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GeForce GTX 965M vs Radeon HD 7770

Intro

The GeForce GTX 965M uses a 28 nm design. nVidia has set the core frequency at 944 MHz. The GDDR5 RAM runs at a speed of 1000 MHz on this card. It features 1024 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator Units.

Compare all that to the Radeon HD 7770, which has GPU clock speed of 1000 MHz, and 1024 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also is made up of 640 Stream Processors, 40 TAUs, and 16 Raster Operation Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 965M		5650 points
Radeon HD 7770		3180 points
	Difference: 2470 (78%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
Radeon HD 7770		80 Watts
	Difference: 20 Watts (33%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7770 is 13% quicker than the GeForce GTX 965M overall, because of its greater bandwidth. (explain)

Radeon HD 7770		72000 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 8000 (13%)

Texel Rate

The GeForce GTX 965M is a lot (about 51%) faster with regards to anisotropic filtering than the Radeon HD 7770. (explain)

GeForce GTX 965M		60416 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 20416 (51%)

Pixel Rate

The GeForce GTX 965M will be quite a bit (about 89%) faster with regards to AA than the Radeon HD 7770, and also will be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 14208 (89%)

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 7770

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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	GeForce GTX 965M	Radeon HD 7770
Manufacturer	nVidia	AMD
Year	January 5 2015	February 2012
Code Name	GM204	Cape Verde XT
Memory	2048 MB	1024 MB
Core Speed	944 MHz	1000 MHz
Memory Speed	4000 MHz	4500 MHz
Power (Max TDP)	60 watts	80 watts
Bandwidth	64000 MB/sec	72000 MB/sec
Texel Rate	60416 Mtexels/sec	40000 Mtexels/sec
Pixel Rate	30208 Mpixels/sec	16000 Mpixels/sec
Unified Shaders	1024	640
Texture Mapping Units	64	40
Render Output Units	32	16
Bus Type	GDDR5	GDDR5
Bus Width	128-bit	128-bit
Fab Process	28 nm	28 nm
Transistors	(Unknown) million	1500 million
Bus	PCIe 3.0 x16	PCIe 3.0 x16
DirectX Version	DirectX 12	DirectX 11.1
OpenGL Version	OpenGL 4.5	OpenGL 4.2

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the graphics 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 most pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

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