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GeForce GTX 950M vs Radeon HD 3870 1GB

Intro

The GeForce GTX 950M makes use of a 28 nm design. nVidia has set the core frequency at 914 MHz. The DDR3 RAM works at a frequency of 1000 MHz on this particular model. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Compare all of that to the Radeon HD 3870 1GB, which features GPU clock speed of 775 MHz, and 1024 MB of GDDR4 memory set to run at 1125 MHz through a 256-bit bus. It also features 320(64x5) SPUs, 16 TAUs, and 16 ROPs.

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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

The Radeon HD 3870 1GB should in theory be quite a bit faster than the GeForce GTX 950M in general. (explain)

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

Texel Rate

The GeForce GTX 950M should be quite a bit (about 195%) faster with regards to anisotropic filtering 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

The GeForce GTX 950M should be just a bit (more or less 18%) more effective at anti-aliasing than the Radeon HD 3870 1GB, and also should be capable of handling higher screen resolutions more effectively. (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

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.

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: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, 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 can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka 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 - the lower the bandwidth is, the lower the potential to get to the max 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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