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Changing power supplies

M

ministre

n00b
Joined
Jun 5, 2006
Messages
1
Hello:

I am trying to change my CPU's power supply. I bought a new "ANTEC NEO HE V2.2 430 Watt" power supply. When I try to power up, the fan over the processor starts to run for 1 or 2 seconds and then the whole machine turns off. Before buying the ANTEC power supply, I was using a cheap 300 Watt ATX power supply PSIV-400-2 from "Taiwan Youngyear electronics Co. Ltd". Since the ANTEC power supply I bought is 430 Watt, I was thinking that there would be enough power to run my computer.

Some information about my machine:
I am running an AMD Athlon processor (1095MHz) and the mother board I am using is K7S5A from EliteGroup. The specs for the motherboard can be found here: http://www.ecs.com.tw/ECSWeb/Produc...LanID=9&DetailID=192&DetailName=Specification

I emailed ANTEC's customer service and I got the following response:
=============================================================
You may not be meeting the minimum load requirements for the power supply. Each rail requires 1 amp of load to stay running. Also, you may be using an ASUS board that has difficulty with 2.2 power supplies.
=============================================================

I am a bit at lost as it is my 1st time changing the power supply of my CPU. Is there anything special I should know about power supplies ? If someone else has any experience about changing power supplies I would appreciate any comments.

Thanks
Richard
 
Ok. Your motherboard lacks the extra connector that utilizes the second rail on the Antec NeoHE.

Your NeoHE is a three-rail design. There is one rail for the cpu, one for the pci-e video card, and one for everything else. Now since your mobo lacks the connector, it only uses one rail for everything.

I recommend taking the NeoHE back, and purchasing a single-railed psu. Since your CPU is 1100mhz, and you're running older hardware, you can get by with a psu similar to the FSP 300w. It would suit your needs.

And a final note, is anything shorting out? That might be the cause of the brief power-on-off bit.
 
Maybe this thread can help me.

I had a problem with my Antec SL450 power supply and am going through the RMA process right now. I called Antec to ask if a higher watt psu would be recommended. They told me it is, but that my current motherboard couldnt run their new line of products just like ministre.

I have been getting mixed answers as far as what the next step should be. Do I keep the new SL450 they send me or get a higher powered psu?

These are my specs:

ASUS A8V DELUXE Socket 939 VIA K8T800 Pro ATX AMD Motherboard -

XFX PVT40KND Geforce 6800 128MB DDR AGP 4X/8X Video Card -

AMD Athlon 64 3500+ Newcastle 2000MHz HT Socket 939 Processor Model ADA3500AWBOX -

CORSAIR XMS 1GB (2 x 512MB) 184-Pin DDR SDRAM DDR 400 (PC 3200) Unbuffered Dual Channel Kit System Memory Model TWINX1024-3200C2PT -

Seagate Barracuda 7200.7 ST3200822AS 200GB 7200 RPM Serial ATA150 Hard Drive - OEM

LITE-ON DVD Burner Black IDE Model SOHW-1633S -

1 floppy drive
2 more sata drives

What do you guys think? If I choose to get a more powerful psu, it seems (as this thread and Antec has stated) I would have to change my motherboard to make it run. Also, what do you think (if i really do need more power) about just finding an older model psu such as the ENERMAX EG651P-VE FM(24P) ATX 550W.

Thanks for any possible opinions.
 
It's not the power supply. The Asus a8v has the extra 2x2 P4 connector, meaning your supply is dual-rail compatable. The 450 should be more than enough. Try looking for the problem in a different area, because it's not with the power supply.
 
Ive had this problem with bad motherboards. Replacing the motherboard works. It's happened to me on two different systems where the computer and fans will start up for a second or two and then stop. Plug your PSU into another mobo and see if it works--Im fairly sure it's not the PSU that's bad.
 
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