If you are located in the US, get a bunch of these 350w Seasonic SS-350ET ATX power supplies. ($16 each shipped)
http://www.ebay.com/itm/Seasonic-SS-350ET-PSU … it/282292578500

Then for the systems that use AT power supplies, get these adapters.
http://www.ebay.com/itm/ATX-20-PIN-to-AT-P8-P … DE/251025150787

You may need higher wattage for the Q6700 system depending on if you are overclocking and what video card you are using. Maybe even for the Athlon XP system.. but I really doubt it.

What video card is in the Q6700 system?

The Q6700 has a GeForce 9800GT 1GB PCI-X in it

I will check out those supplies you linked to as well...

The 9800GT calls for a minimum of a 400w power supply.

I would probably get at least a 450w or 500w for the Q6700 system.

Here is a Seasonic SS-500ET for $33 shipped.
http://www.ebay.com/itm/Genuine-SeaSonic-SS-5 … W-/232399446511

Can you tell I like Seasonic power supplies?

cyclone3d wrote:

If you are located in the US, get a bunch of these 350w Seasonic SS-350ET ATX power supplies. ($16 each shipped) http://www.ebay […]
Show full quote

If you are located in the US, get a bunch of these 350w Seasonic SS-350ET ATX power supplies. ($16 each shipped)
http://www.ebay.com/itm/Seasonic-SS-350ET-PSU … it/282292578500

Then for the systems that use AT power supplies, get these adapters.
http://www.ebay.com/itm/ATX-20-PIN-to-AT-P8-P … DE/251025150787

You may need higher wattage for the Q6700 system depending on if you are overclocking and what video card you are using. Maybe even for the Athlon XP system.. but I really doubt it.

What video card is in the Q6700 system?

I don't know about using these supplies in older systems. Even if the power supply can do 130W between the 5v and 3.3v rail, It seems the unit was designed to do most of its output on the 12v rail and the unit may no respond well to crossloading the 5v and 3.3v rails, I don't know how it would perform since I can't find any tests online.

i486_inside wrote:

I don't know about using these supplies in older systems. Even if the power supply can do 130W between the 5v and 3.3v rail, It seems the unit was designed to do most of its output on the 12v rail and the unit may no respond well to crossloading the 5v and 3.3v rails, I don't know how it would perform since I can't find any tests online.

I've compared the output vs an AT power supply as well as an older ATX power supply that mainly did 3.3v and 5v.

As long as you get a 350w or higher output, you should have plenty of amperage on the 3.3v and 5v rails for older systems.

Back then, most people were running super crappy 250-300w power supplies which were probably more like 200-225w max with absolutely horrible regulation if they were actually tested

I'll just say that I haven't had any issues running newer high quality power supplies on older systems.

I like the Enermax EG365P and EG465P PSUs. Look at their labeling though, they have some variations with different amperage limits per rail. These PSUs were made during the awkward time when loads were starting to shift to +12V but it wasn't universal yet.
My best all-around PSU for 32-bit era systems is a 465P which has ample current on every rail, so it basically can run anything without breaking a sweat. But like I mentioned, some variants have different limits, mine is one that was well rounded.
An unexpected bonus is that it has a nicely terminated 3.3v test point on the wiring harness. I had no idea any PSUs ever provided that. It's my favorite general purpose testing PSU.

For systems that don't draw much from +12V:
FSP300-60PFN(12V) - I don't know how much of that part number is actually important.
These are Fortron but are sold under different brands. I haven't looked lately but they used to be common and cheap.
They have strong +3.3v and +5v outputs, I even ran a daily-use nForce2 AthlonXP w/ Radeon 9800 Pro from one. However they have bad caps. If you're willing to recap them then I recommend them, otherwise it might be a bad idea.

I have an FSP300 in one of my builds now....not sure of the exact model.....

As for the rest of these, I will look into them and get what I need....

For my list I put at the start of this thread, which should I look for more on the 12V rail and which need more on the 5V Rail?

cyclone3d wrote:

The 9800GT calls for a minimum of a 400w power supply. […]
Show full quote

The 9800GT calls for a minimum of a 400w power supply.

I would probably get at least a 450w or 500w for the Q6700 system.

Here is a Seasonic SS-500ET for $33 shipped.
http://www.ebay.com/itm/Genuine-SeaSonic-SS-5 … W-/232399446511

Can you tell I like Seasonic power supplies?

Be aware that the Seasonic SS-350ET has OST caps on the output rails and lots of that yellow glue that turns brown then black and can cause shorts.

shamino wrote:

I like the Enermax EG365P and EG465P PSUs. Look at their labeling though, they have some variations with different amperage lim […]
Show full quote

I like the Enermax EG365P and EG465P PSUs. Look at their labeling though, they have some variations with different amperage limits per rail. These PSUs were made during the awkward time when loads were starting to shift to +12V but it wasn't universal yet.
My best all-around PSU for 32-bit era systems is a 465P which has ample current on every rail, so it basically can run anything without breaking a sweat. But like I mentioned, some variants have different limits, mine is one that was well rounded.
An unexpected bonus is that it has a nicely terminated 3.3v test point on the wiring harness. I had no idea any PSUs ever provided that. It's my favorite general purpose testing PSU.

For systems that don't draw much from +12V:
FSP300-60PFN(12V) - I don't know how much of that part number is actually important.
These are Fortron but are sold under different brands. I haven't looked lately but they used to be common and cheap.
They have strong +3.3v and +5v outputs, I even ran a daily-use nForce2 AthlonXP w/ Radeon 9800 Pro from one. However they have bad caps. If you're willing to recap them then I recommend them, otherwise it might be a bad idea.

I like Enermax also but be aware that most of them have the dreaded yellow glue in them that will short things out when the glue dries up and conducts across other parts. The first thing that I do when I get them is to open them up and remove as much of the glue as possible.

FSP/SPI powersupplies are generally solid designs with properly sized components and nothing critical missing, although capacitor selection can be variable. Always pop the top and check for failed caps. I have a FSP300 plagued with Fuhjyyu which needs TLC before I use it again.

Delta, LiteOn are also very fine PSUs, better than FSP usually. They can be found as OEM in brand PCs. Your Athlons could use 30A or more on the 5V rail,

Indeed, the Delta DPS-300GB is appropriate for a 5V rail heavy Athlon build.

TOBOR wrote:

cyclone3d wrote:

The 9800GT calls for a minimum of a 400w power supply. […]
Show full quote

The 9800GT calls for a minimum of a 400w power supply.

I would probably get at least a 450w or 500w for the Q6700 system.

Here is a Seasonic SS-500ET for $33 shipped.
http://www.ebay.com/itm/Genuine-SeaSonic-SS-5 … W-/232399446511

Can you tell I like Seasonic power supplies?

Be aware that the Seasonic SS-350ET has OST caps on the output rails and lots of that yellow glue that turns brown then black and can cause shorts.

I have one of the SS-350ET power supplies opened up that I got from the seller I linked to. The capacitors are all Su'scon and the glue is all white, not yellow.

cyclone3d wrote:

TOBOR wrote:

cyclone3d wrote:

The 9800GT calls for a minimum of a 400w power supply. […]
Show full quote

The 9800GT calls for a minimum of a 400w power supply.

I would probably get at least a 450w or 500w for the Q6700 system.

Here is a Seasonic SS-500ET for $33 shipped.
http://www.ebay.com/itm/Genuine-SeaSonic-SS-5 … W-/232399446511

Can you tell I like Seasonic power supplies?

Be aware that the Seasonic SS-350ET has OST caps on the output rails and lots of that yellow glue that turns brown then black and can cause shorts.

I have one of the SS-350ET power supplies opened up that I got from the seller I linked to. The capacitors are all Su'scon and the glue is all white, not yellow.

Are you sure? Look under the small 8mm dia. output caps along the side of the board. Mine had the yellow glue under and around the caps spread like butter. I have a later version than you do, Rev:A2W.

TOBOR wrote:

Are you sure? Look under the small 8mm dia. output caps along the side of the board. Mine had the yellow glue under and around the caps spread like butter. I have a later version than you do, Rev:A2W.

Yep, 100% sure. The 2 I haven't used yet are Rev:C1W