I am starting to put together a new desktop and I am putting the finishing touches on specing it out and looking at power supplies. This is going to be a monster desktop as I am looking at cashing in some stock and putting together a $4.5K system.
The power usage I have calculated is (for brands that do not provide complete power information in their manual/datasheet I used another brand's similar product):
3.3V = 3 + 0.2 + 0.5 = 3.7A 12.21W (34A)
+5V = 2 + 0.5 + 4 + 7.88 + 3.42 + 4 + 1.2 + 0.23 = 23.23A 116.15W (34A)
+12V-1 = 9.2A + 0.3 + 0.6 = 10.1A 121W (18A)
+12V-2 = 6.04 + 7.98 + 1.6 + 0.3 = 15.92A 191W (18A)
Total Watts: 440W
This is with a single DVD-RW in the system. The 7.98A (edit: fixed) on 12V-2 is for 3 15K hard drives. If I add a DVD-ROM drive (1.5A on 12V-2) to the system to be able to do disk-to-disk burns I am up to about 17.5A on +12V-2. This does not sound like a good idea to me.
Is there a good power supply with more power available on the +12V rail? I could always move the hard drives into an external enclosure if I have problems, but I'd rather not as it makes moving the machine more of a pain.
The Antec TruePower II 550W is rated at 19A on both 12V rails. Enermax seems to have more stable rails than Antec in my experience, but do you guys think the Antec would be a safer bet? Going with the Antec would probably allow me to safely add a DVD-ROM to the system.
The power usage I have calculated is (for brands that do not provide complete power information in their manual/datasheet I used another brand's similar product):
3.3V = 3 + 0.2 + 0.5 = 3.7A 12.21W (34A)
+5V = 2 + 0.5 + 4 + 7.88 + 3.42 + 4 + 1.2 + 0.23 = 23.23A 116.15W (34A)
+12V-1 = 9.2A + 0.3 + 0.6 = 10.1A 121W (18A)
+12V-2 = 6.04 + 7.98 + 1.6 + 0.3 = 15.92A 191W (18A)
Total Watts: 440W
This is with a single DVD-RW in the system. The 7.98A (edit: fixed) on 12V-2 is for 3 15K hard drives. If I add a DVD-ROM drive (1.5A on 12V-2) to the system to be able to do disk-to-disk burns I am up to about 17.5A on +12V-2. This does not sound like a good idea to me.
Is there a good power supply with more power available on the +12V rail? I could always move the hard drives into an external enclosure if I have problems, but I'd rather not as it makes moving the machine more of a pain.
The Antec TruePower II 550W is rated at 19A on both 12V rails. Enermax seems to have more stable rails than Antec in my experience, but do you guys think the Antec would be a safer bet? Going with the Antec would probably allow me to safely add a DVD-ROM to the system.
