help to replace PSU

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help to replace PSU

Postby Robhalfordfan » 2019-7-12 @ 19:28

hello all

i am needing to replace my PSU for my Win98 pc as the old one died because the transformer died

the old PSU i used was

Enermax EG465AX-VE(G) 460W ATX

wondering if this PSU will work ok as not sure if the 5v rail has be higher than the 12v rail

https://www.newegg.com/global/uk-en/the ... 6817153023


the specs of this build is

Motherboard - Jetway V600DAP
CPU - AMD Athlon XP 3200+
Ram - 512mb (2x 256mb)
Graphics -ATI Radeon 9800 SE (256mb)
HDD - Maxtor 6Y120L0 120GB
Drives - 1x AOpen IDE 52X32X Combo CD-RW+DVD-Rom Drive Model COM5232/AAH PRO
- 1x 1.44mb Floppy Drive
Sound - Soundblaster PCI 512
Fans - 2x 80mm Case Fans
Last edited by Robhalfordfan on 2019-7-13 @ 13:43, edited 1 time in total.
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Re: help to replace PSU

Postby retardware » 2019-7-12 @ 20:32

just the thought of using a Thermaltake PSU induces eerie feelings in me.
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Re: help to replace PSU

Postby ODwilly » 2019-7-13 @ 06:56

Robhalfordfan wrote:hello all

i am needing to replace my PSU for my Win98 pc as the old one died because the transformer died

the old PSU i used was

Enermax EG465AX-VE(G) 460W ATX

wondering if this PSU will work ok as not sure if the 5v rail has be higher than the 12v rail

https://www.newegg.com/global/uk-en/the ... 6817153023


the specs of this build is

Motherboard - Jetway V600DAP
CPU - AMD Althon XP 3200+
Ram - 512mb (2x 256mb)
Graphics -ATI Radeon 9800 SE (256mb)
HDD - Maxtor 6Y120L0 120GB
Drives - 1x AOpen IDE 52X32X Combo CD-RW+DVD-Rom Drive Model COM5232/AAH PRO
- 1x 1.44mb Floppy Drive
Sound - Soundblaster PCI 512
Fans - 2x 80mm Case Fans

Stay far, far away from the non 80 plus certified Thermaltake TR2 psu's. They are god awful.
Main pc: Asus Rampage Gene ii, X5650, 250gb Samsung Evo, RX480, 12gb Crucial DDR3 1600.
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Re: help to replace PSU

Postby Robhalfordfan » 2019-7-13 @ 09:39

ODwilly wrote:
Robhalfordfan wrote:hello all

i am needing to replace my PSU for my Win98 pc as the old one died because the transformer died

the old PSU i used was

Enermax EG465AX-VE(G) 460W ATX

wondering if this PSU will work ok as not sure if the 5v rail has be higher than the 12v rail

https://www.newegg.com/global/uk-en/the ... 6817153023


the specs of this build is

Motherboard - Jetway V600DAP
CPU - AMD Althon XP 3200+
Ram - 512mb (2x 256mb)
Graphics -ATI Radeon 9800 SE (256mb)
HDD - Maxtor 6Y120L0 120GB
Drives - 1x AOpen IDE 52X32X Combo CD-RW+DVD-Rom Drive Model COM5232/AAH PRO
- 1x 1.44mb Floppy Drive
Sound - Soundblaster PCI 512
Fans - 2x 80mm Case Fans

Stay far, far away from the non 80 plus certified Thermaltake TR2 psu's. They are god awful.


ok, i looking for psu that has 2 floppy connecters
one for floppy drive and another for graphic card

i am not using any pci-e or sata

so far i am been trying to find 80 plus certified psu but having a hard time finding with 2x floppy connecters and at least 4x 4-pin molex

again not sure if the 5v rail needs to be higher that the 12v rail
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Re: help to replace PSU

Postby ODwilly » 2019-7-13 @ 10:58

https://www.newegg.com/p/N82E1681770700 ... 6817707005 here is pretty good fit for your PC. Plenty of 12v power for your 9800 and lots of 3.3v/5v amperage for your Athlon XP/ peripherals. EDIT: Just to add, my family friend's Dimension 4600 ran with a 9800 pro and a 2.8ghz Prescott P4 on it's dodgy OEM 250watt psu for about 8 years of daily usage.
Main pc: Asus Rampage Gene ii, X5650, 250gb Samsung Evo, RX480, 12gb Crucial DDR3 1600.
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Re: help to replace PSU

Postby retardware » 2019-7-13 @ 13:16

ODwilly wrote:https://www.newegg.com/p/N82E16817707005?Item=N82E16817707005 here is pretty good fit for your PC.

Agreed. And it causes far less shivers running over my back.
Though, I have difficulties understanding why people use budget PSU for that hard-to-replace retro stuff.
Imho top quality brand PSU is a must, to avoid unnecessary meltdowns.
The savings just don't weigh up the risk.
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Re: help to replace PSU

Postby Robhalfordfan » 2019-7-13 @ 13:56

ODwilly wrote:https://www.newegg.com/p/N82E16817707005?Item=N82E16817707005 here is pretty good fit for your PC. Plenty of 12v power for your 9800 and lots of 3.3v/5v amperage for your Athlon XP/ peripherals. EDIT: Just to add, my family friend's Dimension 4600 ran with a 9800 pro and a 2.8ghz Prescott P4 on it's dodgy OEM 250watt psu for about 8 years of daily usage.


thank you

is that brand new or used

would 300w be enough to power my win98 rig as some psu calculators say somewhere between 365w and 400w
Last edited by Robhalfordfan on 2019-7-13 @ 14:24, edited 1 time in total.
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Re: help to replace PSU

Postby Robhalfordfan » 2019-7-13 @ 14:15

retardware wrote:
ODwilly wrote:https://www.newegg.com/p/N82E16817707005?Item=N82E16817707005 here is pretty good fit for your PC.

Agreed. And it causes far less shivers running over my back.
Though, I have difficulties understanding why people use budget PSU for that hard-to-replace retro stuff.
Imho top quality brand PSU is a must, to avoid unnecessary meltdowns.
The savings just don't weigh up the risk.


looking around online and thinking why some people buy budget psu to replace retro stuff

most common modern psu are designed for modern computers etc and considering most power pc gamer will use higher psu than what was used before late 90s - mid 2000s

like most people power pc gamer
-most good quality brands are expensive (paying more for the brand name)
-will most likely have high end power hungry graphic card or sli or crossfire (full HD/4K gaming) (bitcoin mining)
-faster most powerful cpu with more than one core/threads (full HD/4K gaming with 60fps all the time)
-most if not all modern components use 12v a lot more than 5v (could be wrong or getting mixed up) and have more than 12v rail (most older devices eg. floppy drive, PCI/AGP no longer used or supported)(some people don't use disc drives, sound cards or mechanical HDD and opt for SSD)

i could be wrong but these are rough ideas why psu can be expensive or hard to replace for retro system
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Re: help to replace PSU

Postby retardware » 2019-7-13 @ 14:51

Yup, this is why I ended up refurbishing old but good PSUs that pass my ATX specifications compliance tests.
As from the used power supplies that I got into my hands which are >10 yrs old, far less than 20% pass these specs, I just pick these with the best design and refurbish (recap etc) them.
I do not use PSUs that have no working overcurrent protection, to protect blowing up mobos etc, in case should a tantalum etc decide to short out.

In case I would not have good spares, I'd try some good modern PSU with modular cabling (just an example, there are probably more suitable ones in the 400W range), and return them if they do not comply with ATX spec at high load with 3.3/5V. These use quality components, are no gutless wonders, and offer all sorts of protections.
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Re: help to replace PSU

Postby Robhalfordfan » 2019-7-13 @ 15:09

retardware wrote:Yup, this is why I ended up refurbishing old but good PSUs that pass my ATX specifications compliance tests.
As from the used power supplies that I got into my hands which are >10 yrs old, far less than 20% pass these specs, I just pick these with the best design and refurbish (recap etc) them.
I do not use PSUs that have no working overcurrent protection, to protect blowing up mobos etc, in case should a tantalum etc decide to short out.

In case I would not have good spares, I'd try some good modern PSU with modular cabling (just an example, there are probably more suitable ones in the 400W range), and return them if they do not comply with ATX spec at high load with 3.3/5V. These use quality components, are no gutless wonders, and offer all sorts of protections.


it good you can do that

i would a bit scared to do that and mess about with power supply and also have no clue lol
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Re: help to replace PSU

Postby retardware » 2019-7-13 @ 15:36

Then in your place I'd use that Startech which ODwilly suggested.
Maybe make some photos that show the insides as good as possible, search the thread "A Tale of Two PSU", post them and let the experts judge it.
With a $1 multimeter you also can check whether the voltages are good with your load distribution.
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Re: help to replace PSU

Postby gdjacobs » 2019-7-14 @ 00:54

You can find working Delta and Zippy OEM PSUs with appropriate power distribution online. Most sellers show the label with rail capacities. They don't look fancy and aren't necessarily the quietest, but they're built like a tank. If you want something a little nicer than the Startech PSU (which is perfectly fine if not flashy) and you need a heavier 5V supply or one of the minor rails deleted from the ATX spec, they can be a viable option.
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Re: help to replace PSU

Postby Robhalfordfan » 2019-7-14 @ 11:59

how can i tell if a heavy 5v rail is needed

i am guessing my old psu was overkill for this rig
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Re: help to replace PSU

Postby Robhalfordfan » 2019-7-16 @ 21:23

would this work if i am trouble finding a decent psu with heavy 5v rail and only one floppy connector

https://www.cabledepot.co.uk/17.5cm-pin ... -2352.html
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