Win 7 superfecth/prefetch in hybrid system (SSD + HDD)

[beginner99]

I've read a ton of stuff about this but no one seems to have a clear answer. It is in general recommended (also by intel ssd toolbox) to turn superfetch and prefetch off if you have an ssd. But I also have applications, especially games, on a normal HDD. So therefore I believe I would benefit from these technologies.

Also some people claim superfetch does nothing even if it is turned on if it determines that the drive is fast enough. With "the drive" I assume the OS drive is meant.

Has anyone here played around with superfetch settings? (eg 0,1,2,3)

I'm also uncertain what the downside of superfetch is? I mean RAM i still much faster than an ssd so why turn it of at all?

[theevilsharpie]

Superfetch consumes I/O bandwidth. If you have a situation where minimizing I/O bandwidth usage is important (e.g. large-scale VDI, remote iSCSI volumes, etc.), disabling Superfetch may improve performance. Otherwise, I don't see any reason to disable it.

[LokutusofBorg]

The Windows 7 blog has a post about what they did to support SSDs in Windows 7, and in there they mention that Windows itself may disable SuperFetch on an SSD if it's fast enough.

I am of the mind that this is just one of the many completely unneeded SSD "optimizations". Just leave it alone and you'll be fine.

[postmortemIA]

superfetch and disk defragmenter ignore SSDs drives. You may leave it on, it will work on hard drives that you have on system.