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GeForce GTX 950M vs Radeon HD 7770

Intro

The GeForce GTX 950M features a GPU core speed of 914 MHz, and the 2048 MB of DDR3 memory is set to run at 1000 MHz through a 128-bit bus. It also features 640 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Compare all that to the Radeon HD 7770, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM works at a frequency of 1125 MHz on this specific card. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator 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

Performance-wise, the Radeon HD 7770 should in theory be a lot better than the GeForce GTX 950M overall. (explain)

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

Texel Rate

The Radeon HD 7770 is a little bit (about 9%) better at texture filtering 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 is a little bit (more or less 9%) more effective at full screen anti-aliasing than the GeForce GTX 950M, and also should be capable of handling higher 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 maximum amount of data (in units of megabytes per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units 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 most pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

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