PCA Forums

Anyone recommend a good top of the line PS?
I have a coolmax CT-470 (470 watt) PS and I am having problems with my computer randomly restarting. From desktop to bios. Usually a PS problem and Im thinking of upgrading the PS.

what motherboard do you have ? maybe the Antec TruePower 420w ?

Gigabyte 7N400 Motherboard

I also like th e Antec power supplies or if you have lots of $$$ the PC Power and Cooling supplies are really nice

I have had that kind or rebooting problem twice and both times it turned out to be a bad stick of ram. Just something to think about.

Antec True psu's and the new 'Noisetaker' psu's from Enermax (dual 12v rails) seem to be about the best. Unless you can spring for a pc power and cooling one.

Maybe you cound borrow a different PS first?
I thought I had a bad PS too and replaced it with an Enermax (random reboots) but didn't help. Well I wanted an upragrade anyway so I replaced the cpu MB and ram and a format/reinstall of windows. That worked. Funny thing is, I took all the old stuff and upgraded my p3450 to (the old)xp 1800 and expected to have the same problems. It runs fine. On the P3 upgrade I only repaired windows though. Hmmm.. It was either all the reseating or the windows repair.. I'm thinking the repair because I had tried reseating.
Just saying a bad PS isn't always it but very well could be.
Good luck.

Well it is a new mobo (had the same problem with the old mobo).
I have had issues like this with bad ram in the past. Im just hoping its not RAM. I have a gig of good ram in there and replacing a PS is much cheaper then the ram. Who knows. I might just deal with the reboots and save some cash till something really breaks

I just got one of these and i cannot say enough good things about it:

EG851AX-VH(W) FM


http://www.enermax.com.tw/product-01.htm


Features
• High output:660W/550W output provides sufficient power for server system.
• High compatibility upports Intel Xeon and AMD MP dual CPU server/workstation board.
• Compatible with Intel SSI "EPS+12V V2.0" & AMD "ATX-GES" power supply form factors.
• Complete protection circuits ensure the highest system reliability: Over Current protection, Over Voltage protection, Under Voltage protection, Over Load protection, Short Circuit protection.
• Aluminum housing as external heat sink provides the best heat conduction to cool down heat generating components.
• Dual fans design,with high quality and long MTBF Sanyo Denki coolers, offers the best heat ventilation effect.
• Active PFC, PF Value >=0.95
• Extended PS/2 size 150W x 86H x 180D for both Tower and rack mount chassis.
• Two load ranges are defined to cover various power consumptions of different system configurations, from heavy to light load.
• Copper Shielding Tube on "Main/Processor/workstation power" output wire harness provide better EMI reduction.
• Cable sets for adapting EPS 12V Main power (24-pin ) and Processor power (8-pin) connectors to corresponding ATX 12V & AMD ATX GES connectors. *(As shown in photos)



Model No.
EG851AX-VH(W)
EG651AX-VH(W)



I/P
Voltage rating
90V~264V AC(Full Range)

Current rating
10A
9A

Frequency
47Hz~63Hz

Inrush current
25A max 240V (during cold start)

O/P
DC
Voltage
Ripple & Noise
Total
Reg.
Output current rating

Load Range 1

(Min. / Max.)
Load Range 2

(Min. / Max.)
Load Range 1

(Min. / Max.)
Load Range 2

(Min. / Max.)

+3.3V
50mV
+5/-3%
1.5A /38A
0.3A /9A
1.5A /36A
0.5A /9A

+5V
50mV
+5/-4%
5A /42A
2A / 8A
5A /36A
2A / 7A

+12V1
120mV
+5/-4%
1.5A / 14A
0.5A / 9A
1.5A / 14A
0.5A / 5A

+12V2
120mV
+5/-4%
1.5A /18A
0.5A / 6A
1.5A /16A
0.5A / 4A

+12V3
120mV
+5/-4%
1.5A /16A
0.5A / 9A
1.5A /16A
0.5A / 6A

+12V4
120mV
+5/-4%
1.5A / 14A
2A /9A
1.5A / 14A
2A /5A

-12V
120mV
+9/-5%
0A / 0.8A
0A / 0.5A
0A / 0.8A
0A / 0.5A

+5Vsb
50mV
+5/-3%
0.1A / 2.7A
0.1A / 2A
0.1A / 2.7A
0.1A / 2A

+3.3V & +5V
240W
200W

Max. Combined +12V
480W(40A)
420W(35A)

Total Power
660W
550W

Hold up time
18ms min. at 100~230V AC full load

Over Power Protection
105%~140% of max load

Under Voltage/Short Circuit Protection


+3.3V: 2.6V min, 2.9V max
+ 5V : 4.1V min, 4.5V max
+ 5Vsb:4.1V min, 4.5V max
+12V1.2..4 : 9.5V min, 10.5V max

Over Voltage Protection
+3.3V: 3.9V~4.5V
+ 5V : 5.7V~6.5V
+12V:13.3V~14.5V

Over Current Protection
+3.3V:55A max
+ 5V : 48A max
+12V1.2.3.4 :20A max

Efficiency
70% min. at full load

Cooling
Air convection by +12V DC fan

Operation Temperature
0ºC ~45ºC for full rating of load, 50ºC for 75% of rated load,

decrease to zero Waltts O/P at 70ºC

Storage Temperature
-20ºC ~80ºC

Humidity
Operating: to 85% relative humidity , non-condensing At 25ºC
Storage : to 95% relative humidity , non-condensing At 50ºC

MTBF
100K hours at 25ºC, 70% full rated load, 115VAC Input

EMC
EN55022 CLASS B

EN61000-3-2

EN 61000-3-3

EN 61000-4-2

EN 61000-4-3

EN 61000-4-4

EN 61000-4-5

EN 61000-4-6

EN 61000-4-8

EN 61000-4-11

FCC Part 15 & Part 2 and CNS 13438 Class B

Safety
UL cUL VDE DEMKO NEMKO SEMKO FIMKO

Dimension
W150 x H86 x D180 (mm)

Another vote for Antec Tru-Power.

My son is been having rebooting problems on his Asus P4 1.4GHz system. I've been thinking about replacing the PS because we bought it really cheap used ($20). It does have p4 support, and all was working fine until last month.

He's got RDRAM on his mobo (640 total). All slots are filled. What is really weird is once it's at the desktop, it runs just fine. It only happens on a cold boot. I've enabled the memory test to allow the PW (and other componets) to warm up first, but even that did not help it. Once it reboots 2 times from a cold start, then it works just fine.

EXEC: Sure sounds like a PSU stability issue

Also , if you are having random reboot problems, be sure to check the MOBO for leaky caps- i just had to replace one recently. in 2003 bad caps wasa big issue over in japan

Originally posted by BillyGoat
Also , if you are having random reboot problems, be sure to check the MOBO for leaky caps- i just had to replace one recently. in 2003 bad caps wasa big issue over in japan

Yeah that was the first thing that I did. I did not see any leaky ones or any bulging. I'm probably going to try the PS first since I already have 2 new ones that I purchased.

I'd give it a run through with memtest86 before swapping out the PSU.