- Nov 11, 2006
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I've upgraded my previous rig last Tuesday. Since then I noticed some weird sound coming from the case now and then (so not contineously). Can't really describe it, it sounds like a whiny/scratchy short bleeps. At first I thought it was my HDD vibrating against a metal part of the case, but that's not the case: it's still well suspended, not touching anything.
I opened the case and disconnected the DVD-ROM, DVD-RW, front-bay cardreader and soundblaster front bay, as those aren't required to boot.
I've put my ear close to all the individual parts and the sound seems to come from the PSU. That's a 3.5 year old Antec NeoHE 380W (see review of the 430W model for details on the PSU). I don't exclude the sound comes from the top of the motherboard, where the voltage regulators are. But I'd rather go for the PSU...
Old specs: http://www.silentpcreview.com/forums/viewtopic.php?p=304964
Changes after upgrade:
* Asus P7P55-M µATX board
* Intel Core i5 750 2.66 GHz quadcore
* Prolimatech Megahalems rev B heatsink
* 2x2GB Kingston DDR3 1333MHz 1.5V
* 80 GB Intel G2 SSD
* replaced the 500GB HDD by a 1TB green HDD some weeks ago
* replaced the defective nVidia 7600GS by a ATi HD5750 last December
I know a 380W PSU is on the low side nowadays, but according to this PSU calculator it should be more than enough. And as PSUs become more efficient when the load is higher, I don't want to exagerate with it's wattage.
With my current setup at 100% load and 20% capacitator aging the calc says I need a PSU of 317W. My old rig was calculated at 300W for the same load and aging.
But the thing is I haven't really stressed the new setup yet. The sound is already noticeable when 3 CPU cores are idling and 1 is doing light work, and the GPU load 0-2%.
Idling this setup draws about 90 to 100W from the outlet (measured!) and before upgrading I've never noticed this sound, even when really stressing the old setup (yes, incl stressing the HD5750). So I have problems to believe suddenly this PSU is giving up on me.
I guess that the power draw (V or A) of a Core i5 is different to that of a Core 2 Duo, and the old PSU isn't adapted for it. But that's only a guess.
Do I really need to look for a new PSU to get this annoying sound out of the way, or is there anything I can do/check? To determine the source of the noise tonight I'll be trying to get the PSU out without having to get all of the hardware out (it took me an hour and a half to get all of it in with clean & tidy cable management!). But even if the source is determined, I'd still like to know why all of a sudden there's a problem.
I opened the case and disconnected the DVD-ROM, DVD-RW, front-bay cardreader and soundblaster front bay, as those aren't required to boot.
I've put my ear close to all the individual parts and the sound seems to come from the PSU. That's a 3.5 year old Antec NeoHE 380W (see review of the 430W model for details on the PSU). I don't exclude the sound comes from the top of the motherboard, where the voltage regulators are. But I'd rather go for the PSU...
Old specs: http://www.silentpcreview.com/forums/viewtopic.php?p=304964
Changes after upgrade:
* Asus P7P55-M µATX board
* Intel Core i5 750 2.66 GHz quadcore
* Prolimatech Megahalems rev B heatsink
* 2x2GB Kingston DDR3 1333MHz 1.5V
* 80 GB Intel G2 SSD
* replaced the 500GB HDD by a 1TB green HDD some weeks ago
* replaced the defective nVidia 7600GS by a ATi HD5750 last December
I know a 380W PSU is on the low side nowadays, but according to this PSU calculator it should be more than enough. And as PSUs become more efficient when the load is higher, I don't want to exagerate with it's wattage.
With my current setup at 100% load and 20% capacitator aging the calc says I need a PSU of 317W. My old rig was calculated at 300W for the same load and aging.
But the thing is I haven't really stressed the new setup yet. The sound is already noticeable when 3 CPU cores are idling and 1 is doing light work, and the GPU load 0-2%.
Idling this setup draws about 90 to 100W from the outlet (measured!) and before upgrading I've never noticed this sound, even when really stressing the old setup (yes, incl stressing the HD5750). So I have problems to believe suddenly this PSU is giving up on me.
I guess that the power draw (V or A) of a Core i5 is different to that of a Core 2 Duo, and the old PSU isn't adapted for it. But that's only a guess.
Do I really need to look for a new PSU to get this annoying sound out of the way, or is there anything I can do/check? To determine the source of the noise tonight I'll be trying to get the PSU out without having to get all of the hardware out (it took me an hour and a half to get all of it in with clean & tidy cable management!). But even if the source is determined, I'd still like to know why all of a sudden there's a problem.
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