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GeForce GTX 950M vs Radeon HD 3870 1GB

Intro

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

Compare all of that to the Radeon HD 3870 1GB, which makes use of a 55 nm design. AMD has clocked the core frequency at 775 MHz. The GDDR4 memory works at a speed of 1125 MHz on this model. It features 320(64x5) SPUs as well as 16 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950M 55 Watts
Radeon HD 3870 1GB 106 Watts
Difference: 51 Watts (93%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 3870 1GB will be 125% quicker than the GeForce GTX 950M overall, because of its greater data rate. (explain)

Radeon HD 3870 1GB 72000 MB/sec
GeForce GTX 950M 32000 MB/sec
Difference: 40000 (125%)

Texel Rate

The GeForce GTX 950M is a lot (about 195%) faster with regards to AF than the Radeon HD 3870 1GB. (explain)

GeForce GTX 950M 36560 Mtexels/sec
Radeon HD 3870 1GB 12400 Mtexels/sec
Difference: 24160 (195%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 950M is superior to the Radeon HD 3870 1GB, though only just barely. (explain)

GeForce GTX 950M 14624 Mpixels/sec
Radeon HD 3870 1GB 12400 Mpixels/sec
Difference: 2224 (18%)

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

Amazon.com

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Radeon HD 3870 1GB

Amazon.com

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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 3870 1GB
Manufacturer nVidia AMD
Year March 12 2015 Nov 19, 2007
Code Name GM107 RV670 XT
Memory 2048 MB 1024 MB
Core Speed 914 MHz 775 MHz
Memory Speed 2000 MHz 2250 MHz
Power (Max TDP) 55 watts 106 watts
Bandwidth 32000 MB/sec 72000 MB/sec
Texel Rate 36560 Mtexels/sec 12400 Mtexels/sec
Pixel Rate 14624 Mpixels/sec 12400 Mpixels/sec
Unified Shaders 640 320(64x5)
Texture Mapping Units 40 16
Render Output Units 16 16
Bus Type DDR3 GDDR4
Bus Width 128-bit 256-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 2.0 x16/AGP 8x
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated 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 filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce GTX 950M

Amazon.com

Check prices at:

Radeon HD 3870 1GB

Amazon.com

Check prices at:

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.

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