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GeForce GTX 980M vs Radeon HD 3650 512MB

Intro

The GeForce GTX 980M comes with a clock frequency of 1038 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It features 1536 SPUs, 96 TAUs, and 64 Raster Operation Units.

Compare those specs to the Radeon HD 3650 512MB, which has GPU core speed of 725 MHz, and 512 MB of GDDR3 RAM set to run at 800 MHz through a 128-bit bus. It also is made up of 120(24x5) SPUs, 8 TAUs, and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 512MB 78 Watts
GeForce GTX 980M 100 Watts
Difference: 22 Watts (28%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 980M will be 400% faster than the Radeon HD 3650 512MB in general, due to its greater bandwidth. (explain)

GeForce GTX 980M 128000 MB/sec
Radeon HD 3650 512MB 25600 MB/sec
Difference: 102400 (400%)

Texel Rate

The GeForce GTX 980M is much (about 1618%) faster with regards to anisotropic filtering than the Radeon HD 3650 512MB. (explain)

GeForce GTX 980M 99648 Mtexels/sec
Radeon HD 3650 512MB 5800 Mtexels/sec
Difference: 93848 (1618%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 980M is the winner, and very much so. (explain)

GeForce GTX 980M 66432 Mpixels/sec
Radeon HD 3650 512MB 2900 Mpixels/sec
Difference: 63532 (2191%)

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 980M

Amazon.com

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Radeon HD 3650 512MB

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 980M Radeon HD 3650 512MB
Manufacturer nVidia AMD
Year October 7 2014 2008
Code Name GM204 RV635 PRO
Memory 4096 MB 512 MB
Core Speed 1038 MHz 725 MHz
Memory Speed 4000 MHz 1600 MHz
Power (Max TDP) 100 watts 78 watts
Bandwidth 128000 MB/sec 25600 MB/sec
Texel Rate 99648 Mtexels/sec 5800 Mtexels/sec
Pixel Rate 66432 Mpixels/sec 2900 Mpixels/sec
Unified Shaders 1536 120(24x5)
Texture Mapping Units 96 8
Render Output Units 64 4
Bus Type GDDR5 GDDR3
Bus Width 256-bit 128-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 max amount of information (counted in megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 980M

Amazon.com

Check prices at:

Radeon HD 3650 512MB

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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