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GeForce GTX 950M vs Radeon HD 7770

Intro

The GeForce GTX 950M uses a 28 nm design. nVidia has clocked the core speed at 914 MHz. The DDR3 RAM works at a speed of 1000 MHz on this specific model. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Compare that to the Radeon HD 7770, which comes with a clock speed of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It features 640 SPUs, 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 950M		3330 points
Radeon HD 7770		3180 points
	Difference: 150 (5%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950M		55 Watts
Radeon HD 7770		80 Watts
	Difference: 25 Watts (45%)

Memory Bandwidth

In theory, the Radeon HD 7770 should be quite a bit faster than the GeForce GTX 950M in general. (explain)

Radeon HD 7770		72000 MB/sec
GeForce GTX 950M		32000 MB/sec
	Difference: 40000 (125%)

Texel Rate

The Radeon HD 7770 is a small bit (more or less 9%) more effective at AF than the GeForce GTX 950M. (explain)

Radeon HD 7770		40000 Mtexels/sec
GeForce GTX 950M		36560 Mtexels/sec
	Difference: 3440 (9%)

Pixel Rate

The Radeon HD 7770 should be a small bit (about 9%) faster with regards to AA than the GeForce GTX 950M, and will be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 7770		16000 Mpixels/sec
GeForce GTX 950M		14624 Mpixels/sec
	Difference: 1376 (9%)

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 950M

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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 950M	Radeon HD 7770
Manufacturer	nVidia	AMD
Year	March 12 2015	February 2012
Code Name	GM107	Cape Verde XT
Memory	2048 MB	1024 MB
Core Speed	914 MHz	1000 MHz
Memory Speed	2000 MHz	4500 MHz
Power (Max TDP)	55 watts	80 watts
Bandwidth	32000 MB/sec	72000 MB/sec
Texel Rate	36560 Mtexels/sec	40000 Mtexels/sec
Pixel Rate	14624 Mpixels/sec	16000 Mpixels/sec
Unified Shaders	640	640
Texture Mapping Units	40	40
Render Output Units	16	16
Bus Type	DDR3	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: Memory bandwidth is the max amount of data (in units of MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's 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 can be applied in one second. This number 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 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 number of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends 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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