Why did adding memory significantly increase gaming performance on an AMD APU?

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Track title: Over a Mysterious Island

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Chapters
00:00 Question
01:30 Accepted answer (Score 84)
05:52 Answer 2 (Score 15)
07:11 Thank you

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Full question
https://superuser.com/questions/789816/w...

Question links:
[Mafia II]: http://en.wikipedia.org/wiki/Mafia_II

Accepted answer links:
["Accelerated Processing Unit" (APU)]: https://en.wikipedia.org/wiki/AMD_Accele...
[von Neumann bottleneck]: https://en.wikipedia.org/wiki/Von_Neuman...
[GDDR5]: https://en.wikipedia.org/wiki/GDDR5
[dual-channel mode]: https://en.wikipedia.org/wiki/Multi-chan...
[Real World Tech]: http://www.realworldtech.com/gpu-memory-.../
[Tom's Hardware]: http://www.tomshardware.com/reviews/memo...
[PC Perspective]: http://www.pcper.com/reviews/Memory/Ultr...
[Source]: http://www.tomshardware.com/reviews/memo...

Answer 2 links:
[APU]: https://en.wikipedia.org/wiki/Accelerate...

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Tags
#memory #performance #gaming #integratedgraphics

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