Using my old PSU for my new build?

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Philliipp

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Nov 2, 2014
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Hi guys, my current build that is 7 years old:
Asus P5P43TD PRO,
C2Duo E8400,
nVidia 9600GT,
6GB RAM
is powered by my Coolermaster real power m620 PSU. http://www.coolermaster.com/service/support/model/RS-620-ASAA-A1/

I'm looking to build a new PC near Christmas time with these parts:

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor (£131.99 @ Amazon UK)
Motherboard: Asus H97M-E Micro ATX LGA1150 Motherboard (£65.00 @ Amazon UK)
Storage: Kingston SSDNow V300 Series 240GB 2.5" Solid State Drive (£71.99 @ Amazon UK)
Video Card: Sapphire Radeon R9 270X 2GB Tri-X Toxic Video Card (£158.40 @ Aria PC)
Case: Corsair 350D MicroATX Mid Tower Case (£69.00 @ Amazon UK)
Total: £496.38
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-03 01:29 GMT+0000

I've looked on some websites and found that my PSU is actually tier 4...which isn't recommended (http://www.xtremesystems.org/forums/showthread.php?108088-Official-XS-Power-Supply-Ranking-Phase-I), but it's worked fine for me ever since I'd built it 7 years.

Would it be safe to use the same PSU for the new build? And my current case is ATX, will this PSU fit in a micro ATX case?
 
Solution
synphul
Depending on your budget, you could probably get away with using the old psu for awhile but ultimately I'd suggest an upgrade. For one, you're using a lower tier psu and while it's great it's lasted you and served your purpose for 7yrs, that's 7yrs of wear and tear on it. It's not mandatory, but highly suggested to replace with a newer better quality psu.

It should fit the new case. MicroATX cases are typically shorter in height (as are their boards, usually only offering one pcie slot vs 4-5 or more slots available on full atx). As far as I know, standard psu's should fit most if not all (unless there's an odd exception).
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sammy sung

sammy sung

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That supply was a hazard then, and definitely would be now. Power supplies, particularly poorly built ones will degrade over time. A seven year old supply is very very likely well below it's stated overall output and will likely fail, possibly taking things with it.
 
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synphul

synphul

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Mar 11, 2011
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Depending on your budget, you could probably get away with using the old psu for awhile but ultimately I'd suggest an upgrade. For one, you're using a lower tier psu and while it's great it's lasted you and served your purpose for 7yrs, that's 7yrs of wear and tear on it. It's not mandatory, but highly suggested to replace with a newer better quality psu.

It should fit the new case. MicroATX cases are typically shorter in height (as are their boards, usually only offering one pcie slot vs 4-5 or more slots available on full atx). As far as I know, standard psu's should fit most if not all (unless there's an odd exception).
 
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Solution
vicstead

vicstead

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Feb 11, 2011
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vicstead

vicstead

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No, your processor and motherboard are Haswell and your old power supply will not be compatible.
Corsair have a good explanation on their site under Power Supplies.
 
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synphul

synphul

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That's not completely true, the haswell compatibility comes from the new sleep state that the cpu is capable of (c6/c7). Under the circumstances, if there's still a load on the other 3.3 and 5v above a certain point when the cpu attempts to wake from that super low power sleep state it can shut down the psu. This would result in having to flip the switch on the back of the psu to restart it. It was referenced that to avoid issue, many mobo manufacturers were going to ship their boards with the c6/c7 states disabled by default. Those that don't have this as the default, it can be disabled in the bios.
 
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Philliipp

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Nov 2, 2014
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Alright I think I will just have to shell out another £50 or so on another PSU then. Would rather not risk my new parts being blown to pieces after being bought... lol

Thanks everyone for the help!
 
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synphul

synphul

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Mar 11, 2011
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That would probably be the best option, start fresh with a new system given the age of it. If you're concerned about the haswell compatibility, then now would be a good time to double check and see if your new one is supported in the event you'd like to use the new low power sleep states.
 
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