Seeking recommendations for 900+ W quiet PSU
Posted: Tue Jun 30, 2009 9:15 pm
Hi everyone.
I need some assistance selecting a very rugged MM 4U rackmount case and quiet PSU (900+ W).
I currently own a custom Akiwa GHI-691. This is a lovely 6U case, and I enjoy every aspect of it except the noise. The installed Zippy M1W4-6D50P 1U 1300 W "3+1" PSU radiates at 42 to 45 dB, and has been slowly killing me for the last six months (I work in a master bedroom--math, programming, video, sound--I need quiet).
Following is the gear in the box, plus a few extra items (like the Blu-Ray burner and Solid Data SSDs) that I need to put in the new MM 4U:
1 ASUS DSEB-DG/SAS (12" x 13") motherboard
2 x Xeon 5482 CPUs
8 x 2 GB Kinston 800 MHz FB-DIMMs
8 x 1 TB WD SATA 2 HDDs (eventually all SSDs)
4 internal 256 GB SSD drives (Solid Data)
1 5.25" Blu-Ray burners (if 4U)
1 Floppy/card reader
1 Areca 1680ix-24 RAID card
1 FirePro 8700
1 Claro Halo sound card
2 USB ports
1 mouse
1 keyboard
This needs about 700 W or so. I may add another FirePro 8700, which will bring the Power well over 900.
I see that the Seasonic M12D-850W ([link deleted]) is the current favorite high-power quiet PSU. I had my heart set on a PPC Silencer 910. Why is this not in the SPCR list? Is it much noisier? I do not need modular connectors, and James (lead engineer at PPC) says they don't like to use the modular connectors because they've seen problems with oxide and voltage drops. These are gold connectors usually, aren't they? Can anyone confirm this?
My top choices for the 4U rackmount case are
GHI-443:
[link deleted]
RMC-7L-0-0-2-R:
[link deleted]
These boxes take 3.5" hot-swaps. Ideally I would like a MM 4U box (which is the smallest size that can handle a PS2-form PSU [without a special bracket]) that has 16 or more 2.5" hot-swaps, plus room for 1 or 2 5.25" devices and a floppy/card reader. Only Supermicro gets close, but I don't like the Supermicro look (they write their name all over their cases in big tacky letters). The time may be too early to move to the 2.5" format, in anticipation of phasing over to all SSDs, but I like the idea. Thoughts? Are we certain that forthcoming SSDs will hold to the 2.5" form-factor?
I am open to suggestions. I want the box to be very quiet this time, but, because my power requirements are very high, I am willing to allow more noise than many of you. I think 28 to 30 dB is probably my top end. Not sure. I've noticed that a flatter spectrum is much easier to tolerate. The one coming from the fans in the big Zippy has a clear center-frequency and this grates on me.
Also, I really want to mod the GHI-691 to make it acceptably quiet. I have searched everywhere for quiet 38 mm x 28 mm 12 VDC fans with a 10 or so CFM and a descent static presssure (5+ mm Hg), but can only find a 37 dB (still noisy) candidate from Mechantronics, who must sell me 1000 of them when I want eight. Any suggestions are welcome here too.
And I've asked the guys at Tri-Mag how difficult it would be to tear-out the metal ceiling between the 1U PSU bay (bottom) and 1U rear-mount backplane (middle), which is just under the card-cage (top), and they said they would make a mess of the box, and that buying a new case would be much cheaper. The GHI-691 with the Zippy PSU costs around $2000. It goes onto Craig's List, if I cannot discover an affordable way to make it quiet.
Thank you.
Regards,
Shaping
I need some assistance selecting a very rugged MM 4U rackmount case and quiet PSU (900+ W).
I currently own a custom Akiwa GHI-691. This is a lovely 6U case, and I enjoy every aspect of it except the noise. The installed Zippy M1W4-6D50P 1U 1300 W "3+1" PSU radiates at 42 to 45 dB, and has been slowly killing me for the last six months (I work in a master bedroom--math, programming, video, sound--I need quiet).
Following is the gear in the box, plus a few extra items (like the Blu-Ray burner and Solid Data SSDs) that I need to put in the new MM 4U:
1 ASUS DSEB-DG/SAS (12" x 13") motherboard
2 x Xeon 5482 CPUs
8 x 2 GB Kinston 800 MHz FB-DIMMs
8 x 1 TB WD SATA 2 HDDs (eventually all SSDs)
4 internal 256 GB SSD drives (Solid Data)
1 5.25" Blu-Ray burners (if 4U)
1 Floppy/card reader
1 Areca 1680ix-24 RAID card
1 FirePro 8700
1 Claro Halo sound card
2 USB ports
1 mouse
1 keyboard
This needs about 700 W or so. I may add another FirePro 8700, which will bring the Power well over 900.
I see that the Seasonic M12D-850W ([link deleted]) is the current favorite high-power quiet PSU. I had my heart set on a PPC Silencer 910. Why is this not in the SPCR list? Is it much noisier? I do not need modular connectors, and James (lead engineer at PPC) says they don't like to use the modular connectors because they've seen problems with oxide and voltage drops. These are gold connectors usually, aren't they? Can anyone confirm this?
My top choices for the 4U rackmount case are
GHI-443:
[link deleted]
RMC-7L-0-0-2-R:
[link deleted]
These boxes take 3.5" hot-swaps. Ideally I would like a MM 4U box (which is the smallest size that can handle a PS2-form PSU [without a special bracket]) that has 16 or more 2.5" hot-swaps, plus room for 1 or 2 5.25" devices and a floppy/card reader. Only Supermicro gets close, but I don't like the Supermicro look (they write their name all over their cases in big tacky letters). The time may be too early to move to the 2.5" format, in anticipation of phasing over to all SSDs, but I like the idea. Thoughts? Are we certain that forthcoming SSDs will hold to the 2.5" form-factor?
I am open to suggestions. I want the box to be very quiet this time, but, because my power requirements are very high, I am willing to allow more noise than many of you. I think 28 to 30 dB is probably my top end. Not sure. I've noticed that a flatter spectrum is much easier to tolerate. The one coming from the fans in the big Zippy has a clear center-frequency and this grates on me.
Also, I really want to mod the GHI-691 to make it acceptably quiet. I have searched everywhere for quiet 38 mm x 28 mm 12 VDC fans with a 10 or so CFM and a descent static presssure (5+ mm Hg), but can only find a 37 dB (still noisy) candidate from Mechantronics, who must sell me 1000 of them when I want eight. Any suggestions are welcome here too.
And I've asked the guys at Tri-Mag how difficult it would be to tear-out the metal ceiling between the 1U PSU bay (bottom) and 1U rear-mount backplane (middle), which is just under the card-cage (top), and they said they would make a mess of the box, and that buying a new case would be much cheaper. The GHI-691 with the Zippy PSU costs around $2000. It goes onto Craig's List, if I cannot discover an affordable way to make it quiet.
Thank you.
Regards,
Shaping