metal ring

Willbo · 9 Jul 2006 at 22:33

just found a small metal ring about the size of a £2 coin. i'm sure i got it with my PSU, but whats it for? SOrry for sounding so dumb but :rolleyes:

its sunday night

squiffy · 9 Jul 2006 at 22:38

Possibly a RFI choke?

Jokester · 9 Jul 2006 at 22:38

It'll be a ferrite core for limiting EMI interference from the PSU propagating down the various cables into your PC.

Jokester

Willbo · 9 Jul 2006 at 22:58

so to be dumb again......1) how do i fit it? the holes not that big.......2)what cables does it go around priority wise?

semi-pro waster · 9 Jul 2006 at 23:02

It has always been around all the front connector cables on any case that I have ever bought, how necessary it is I'm not sure but there isn't any harm in it.

Jokester · 9 Jul 2006 at 23:07

Normally it should be fitted at the bit where all the cables come out of the PSU, but if it's not already fitted then I'm not sure how you're going to get it on.

Jokester

cobxx · 9 Jul 2006 at 23:13

IIRC it's around the front panel connectors, not entirely sure how, but it's used to reduce EMI interferance. It could have come off when replacing the connectors or something...but it's not essential.

semi-pro waster · 9 Jul 2006 at 23:13

We might be thinking of different things here but I'm envisaging the small 'doughnut' shaped bit of metal that goes over the front connector cables to the motherboard, I'm not sure about anything that goes over the PSU cables directly.

Willbo · 9 Jul 2006 at 23:50

yeah sounds about right, i think i remember seeing similar in old pc cases around the front connectors......do i just put the cables through the ring or in a special way?

bitslice · 10 Jul 2006 at 00:01

the cables are wrapped around it at least once,

more turns = greater inductance = ~more RF rejection

sara's mum uses ferrite cores
sara's mum is really cool

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