DIGIT-ARC read-only archive · snapshot: July 23, 2026

Using an old PSU with a new build?

48 posts · originally from https://geek.digit.in/community/threads/using-an-old-psu-with-a-new-build.208694/

Renny
Renny Original post #1
Aug 11, 2020 at 12:00 PM
It's been years since I logged into Digit and I've been a member since 2007. It's good to be back!

So I have the following parts:
Ryzen 5 3500
Gigabyte B550 Aurous PRO
16GB DDR4 RAM
Zotack AMP 1660
Deepcool Matreaxx 55 RGB
2 x 4TB SATA HDD
480GB SSD SATA
RGB keyboard and mouse wired

I have a FSP Saga II 500w PSU which is around 6 years old afaik. Should I buy a new PSU or can I use this old one? No plans to overclock.

Should I also get a custom cooler?
Desmond
Desmond #2
Aug 11, 2020 at 12:20 PM
If you've had no problems thus far, I think the PSU should work fine. What's the 80+ rating of the PSU?

Edit: Also, welcome back. I've been here since 2005.
Renny
Renny #3
Aug 11, 2020 at 12:29 PM
Good to see some old timers. Back then we were the young-uns :-D

Description:
ATX 12V V2.3 ready
High efficiency higher than 80%
Supports PCI-Express connector
120mm variable speed fan with ultra low noise
Eco-FRIEndly PSU with active PFC
Thermal coated protection of white casing
230V input with complete protection (OVP; OCP; SCP)

I somehow don't feel that comfortable using a 6 year old psu though. Which one should I which would be future-proof for a Ryzen 4000 cpu and rtx 2070 like gpu?
Desmond
Desmond #4
Aug 11, 2020 at 4:46 PM
High efficiency higher than 80%
But does it have the 80+ certified logo anywhere on it?

Something that looks like one of these:

*www.tomshw.it/files/2014/10/immagini_contenuti/59688/80-plus-230v-w-600_t.png
Renny
Renny #5
Aug 11, 2020 at 4:56 PM
Nope unfortunately. Thinking of this one> *www.amazon.in/gp/product/B07KYR9F24
W
Aug 11, 2020 at 10:31 PM
FSP Saga II series was good for its times but not anymore(I used to have the same psu but different wattage). Get Corsair CX550 as it is the minimum recommended series nowadays(& quite good too) for decent gaming systems.
Renny
Renny #7
Aug 12, 2020 at 11:25 AM
^ Not shippable to my pincode.
Ordered this instead:
*www.amazon.in/gp/product/B07KYR9F24

It's good right?
W
Aug 12, 2020 at 11:46 AM
^ Not shippable to my pincode.
Ordered this instead:
*www.amazon.in/gp/product/B07KYR9F24

It's good right?
Cancel the order, it is a tier D psu recommended only for basic systems with no graphics card.
*linustechtips.com/main/topic/1116640-psucultists-psu-tier-list/
Renny
Renny #9
Aug 12, 2020 at 1:44 PM
Cancelled it. Can you suggest a good one for 6K? Corsair is not shipped to my pincode.

My local shop has Corsair CV650 only, is that good? Edit: Looks like it is Tier C :/
W
Aug 12, 2020 at 2:43 PM
Cancelled it. Can you suggest a good one for 6K? Corsair is not shipped to my pincode.

My local shop has Corsair CV650 only, is that good? Edit: Looks like it is Tier C :/
Check in that psu tier list, corsair CV 650W is tier C. Try these sites:
*mdcomputers.in/corsair-cx550-550-watt-80-plus-bronze-cp-9020121-uk.html
*www.primeabgb.com/online-price-rev...-plus-bronze-certification-psu-cp-9020121-uk/
SaiyanGoku
Aug 12, 2020 at 2:47 PM
Cancelled it. Can you suggest a good one for 6K? Corsair is not shipped to my pincode.

My local shop has Corsair CV650 only, is that good? Edit: Looks like it is Tier C :/
*www.primeabgb.com/online-price-rev...-plus-bronze-certification-psu-cp-9020121-uk/
Renny
Renny #12
Aug 12, 2020 at 2:51 PM
Thanks. 550W won't be cutting it too fine?
W
Aug 12, 2020 at 5:51 PM
Thanks. 550W won't be cutting it too fine?
Good 550W psu(like this one) is enough for anything till 1660Ti/RTX2060 with hexa/octa core processor without doing some good overclocking.
Renny
Renny #16
Aug 13, 2020 at 7:32 PM
Got the CX550. Thanks all.
W
Aug 13, 2020 at 10:15 PM
Got the CX550. Thanks all.
Good to know. It has flat pin plug so you will need to use an adapter to convert it to round pin or you can use your old fsp psu cable if it is in good physical condition.
Renny
Renny #18
Aug 14, 2020 at 9:44 PM
Good to know. It has flat pin plug so you will need to use an adapter to convert it to round pin or you can use your old fsp psu cable if it is in good physical condition.
Edit: Got it. Can you help me with how the attached pic would work?
W
Aug 15, 2020 at 12:24 AM
What is that? You need to connect the pins accordingly as per diagram. Mobo headers have similar connectors where the header pins are labelled as RESET + & - etc & you connect them to header pins on mobo marked with same description like RESET + & - .
Renny
Renny #20
Aug 19, 2020 at 5:16 PM
CPU temps are way off. Prime95 load temps went upto 91.1C and idling temps are 50-65C. Ambient temperature at my place is 25C and I've re-applied paste and seated the fan. 120mm fan missing at the rear of the cabinet but would that make such a drastic difference?

Need recommendations for a good CPU cooler (Moderate OC) with RGB.

Lower the budget the better.
W
Aug 19, 2020 at 8:04 PM
Actually ryzen 3500 runs hotter than usual & I think these idle & load temps are fine but wait for @omega44-xt
Renny
Renny #22
Aug 19, 2020 at 8:16 PM
Yes, many such seen on Reddit. Need some cooler suggestions :)
omega44-xt
Aug 19, 2020 at 8:29 PM
Many people have reported temps in 80s during gaming with R5 3600, so might be similar for R5 3500. Stress tests aren't realistic for most. 50-60C seems a bit high for idle though.

Many have praised this cheap cooler compared to Wraith Stealth along with a cheap & good thermal paste like Arctic MX4:
*www.amazon.in/dp/B01HLAB80C/?coliid=I32LG7SH7AO4KF&colid=33YJTDVPO6E9Z&psc=1&ref_=lv_ov_lig_dp_it
Renny
Renny #24
Aug 19, 2020 at 10:05 PM
Many people have reported temps in 80s during gaming with R5 3600, so might be similar for R5 3500. Stress tests aren't realistic for most. 50-60C seems a bit high for idle though.

Many have praised this cheap cooler compared to Wraith Stealth along with a cheap & good thermal paste like Arctic MX4:
*www.amazon.in/dp/B01HLAB80C/?coliid=I32LG7SH7AO4KF&colid=33YJTDVPO6E9Z&psc=1&ref_=lv_ov_lig_dp_it
Are one of these better?
1597854907853.png
omega44-xt
Aug 20, 2020 at 8:44 AM
Are one of these better?
View attachment 19449
Not sure. When I was searching for a cheap cooler, the one I linked was praised by many. For higher budget, I suggest CM Hyper 212 Black (4.2k) or normal Hyper 212 at 2.8k or so..

But looking at them, it might perform similarly with just an RGB fan attached. If you want to buy one of those, get Cooler Master one.
Renny
Renny #26
Sep 10, 2020 at 2:20 PM
Have a doubt. Got this cooler. Should the plastic mounting bracket which goes behind the mobo be attached via the cabinet or directly to the mobo? Currently I have directly attached it to the mobo and wondering if I should have done it via the cabinet.
1599727773235.png
W
Sep 10, 2020 at 4:44 PM
@SaiyanGoku @omega44-xt even if not the case here I am curious are there mounting brackets for cpu cooler that attaches to cabinet instead of mobo.
omega44-xt
Sep 10, 2020 at 8:05 PM
Only fans that can be mounted to cabinet are case fans AFAIK. I don't know if anybody mounts CPU cooler to cabinet.
+1, didn't hear of it.

But check manual attached with the cooler, that is the best way to know.
Renny
Renny #30
Sep 10, 2020 at 8:16 PM
I assumed for heavy ones like Noctua dh15, it would be through the case so as to not bend or damage the board.
skeletor
skeletor #31
Sep 15, 2020 at 1:23 AM
Off-topic:

Sorta interesting how MediaCrooks turned out. Used to agree with them, still do mostly. But something needs to be done with their victim complex these days. Sorta disingenuous to say that "NDTV" and "Aaj Tak" are the only "mediacrooks" around these days.
quicky008
quicky008 #32
Sep 15, 2020 at 1:34 PM
I assumed for heavy ones like Noctua dh15, it would be through the case so as to not bend or damage the board.
Did you experience any drop in temps after using the aftermarket cooler?
Renny
Renny #33
Sep 16, 2020 at 2:56 PM
Did you experience any drop in temps after using the aftermarket cooler?
I used a cheap thermal compund.

Idle:
Stock: 65C
Deepcool: 45C

Gaming:
Stock: 80C
Deepcool: 60C

Prime95:
Stock: 95C
Deepcool: 88C

Would have got this one for 3.9K, just discovered it after this Deepcool's return period finished.
*www.amazon.in/Cooler-Master-MA621P-MAP-D6PN-218PC-R2-CPU/dp/B07DPQ9MJS
omega44-xt
Sep 17, 2020 at 12:02 AM
I used a cheap thermal compund.

Idle:
Stock: 65C
Deepcool: 45C

Gaming:
Stock: 80C
Deepcool: 60C

Prime95:
Stock: 95C
Deepcool: 88C

Would have got this one for 3.9K, just discovered it after this Deepcool's return period finished.
*www.amazon.in/Cooler-Master-MA621P-MAP-D6PN-218PC-R2-CPU/dp/B07DPQ9MJS
That one is for TR4, not AM4. At 4k or so, CM Hyper 212 Black is an easy recommendation.
Renny
Renny #35
Sep 17, 2020 at 12:04 AM
Oh yeah, missed that. Ryzen. I just figured 2.6k with two fans was pretty good. Maybe a better thermal paste will give an even bigger delta.

Sent from my POCO F1 using Tapatalk
omega44-xt
Sep 17, 2020 at 9:39 AM
Oh yeah, missed that. Ryzen. I just figured 2.6k with two fans was pretty good. Maybe a better thermal paste will give an even bigger delta.

Sent from my POCO F1 using Tapatalk
Sadly not many reviews for such cheap products. CM Hyper 212 Black is considered a budget cooler by many in Western countries. 2 fans might seem better to have but is not always the case, things are usually not so simple.

For example for camera, MP doesn't matter, my S8's 12MP cam can easily outperform many 64MP cams on phones.

Comparing that Deepcool one to CM one I suggested, I can see that CM one has twice the heat pipes between the CPU & radiator, which definitely helps. Maybe that single pre-installed fan can move more air than those 2 fans combined.

The temps you are getting are good actually, so definitely more than enough for you. Maybe try on CPU intensive games, like AC Odyssey, BFV, R6, etc, if temps are under 80C, good enough. Maybe after a year when the paste starts to dry up a bit & you see higher temps, get a good thermal paste, Arctic MX4 is a good cheap paste, costs 500 or so.
bssunilreddy
Sep 17, 2020 at 10:28 AM
Cooler Master Hyper 212 Evo used to be the legendary cooler where as nowadays Hyper 212 Black edition is.
But as an alternative Deepcool offers many good solutions to the very costly Cooler Master Series.

Sent from my Nokia 8.1 using Tapatalk
quicky008
quicky008 #40
Sep 17, 2020 at 3:05 PM
Already using it :)

Sent from my POCO F1 using Tapatalk
Was this cooler easy to install on your mobo?did you run into any unexpected glitches or hangups while attempting to install it?

Also whats the difference between the regular gamaxx 400 and gamaxx 400 pro?
Renny
Renny #41
Sep 17, 2020 at 3:20 PM
Was this cooler easy to install on your mobo?did you run into any unexpected glitches or hangups while attempting to install it?

Also whats the difference between the regular gamaxx 400 and gamaxx 400 pro?
Since this was the first time installing a tower cooler, it took me almost a day of three trail and errors to figure it out. Wish the instructions were more detailed. Main problem was that I couldn't find this cooler installation on Youtube. Looks like 2 vs 1 fan. Get the PRO if you are planning to, and read the schematics and compare it with the orientation repeatedly!
quicky008
quicky008 #42
Sep 17, 2020 at 3:24 PM
ok,and is this cooler suitable for CPUs with high TDP eg Ryzen 2700x?Or can it only cool those CPUs effectively having TDP>90W.
omega44-xt
Sep 17, 2020 at 4:48 PM
Since this was the first time installing a tower cooler, it took me almost a day of three trail and errors to figure it out. Wish the instructions were more detailed. Main problem was that I couldn't find this cooler installation on Youtube. Looks like 2 vs 1 fan. Get the PRO if you are planning to, and read the schematics and compare it with the orientation repeatedly!
By the way, are the cooler fans in push-pull configuration? Like front fan (fan facing front of case) is pushing air into the radiator whereas the back fan is pulling it out of the radiator?
Renny
Renny #44
Sep 17, 2020 at 4:50 PM
By the way, are the cooler fans in push-pull configuration? Like front fan (fan facing front of case) is pushing air into the radiator whereas the back fan is pulling it out of the radiator?
Yes, exactly. Planning to add two fans at the cabinet top, one pulling in air and the one behind it pushing out air.

ok,and is this cooler suitable for CPUs with high TDP eg Ryzen 2700x?Or can it only cool those CPUs effectively having TDP>90W.
Not really sure dude. Try it with a good thermal compound and see. If it doesn't suffice, Amazon's 10 day return policy hain na.
omega44-xt
Sep 17, 2020 at 4:57 PM
Yes, exactly. Planning to add two fans at the cabinet top, one pulling in air and the one behind it pushing out air.


Not really sure dude. Try it with a good thermal compound and see. If it doesn't suffice, Amazon's 10 day return policy hain na.
I was asking about the 2 fans on your CPU cooler, which is likely the case though.

For fans at the top of cabinet, better configure it to push air out of the cabinet as hot air tends to rise up, better not go against physics.
bssunilreddy
Sep 17, 2020 at 5:07 PM
I was asking about the 2 fans on your CPU cooler, which is likely the case though.

For fans at the top of cabinet, better configure it to push air out of the cabinet as hot air tends to rise up, better not go against physics.
2or3 x120mm or 140mm front intake fans for intake, 2or3 x120mm or 140mm top exhaust fans for exhaust and 1 x120mm or 140mm rear exhaust fan for exhaust are standard on almost all cabinets.

In the above mode the air will be sucked from the front and blown out from the top and rear.

So there won't be any hot air inside the cabinet.

As the GPUs will have 2 or 3 fan versions which will automatically cool the graphics cards by setting the fan curves.

And regarding CPU fan setup
One 120mm x25mm fan will be used as push and another 120mm x25mm fan will be used as pull

So thats why its called push pull setup.
This completes the cooling setup in the cabinet.

Sent from my SM-M317F using Tapatalk
Renny
Renny #47
Sep 17, 2020 at 5:14 PM
I was asking about the 2 fans on your CPU cooler, which is likely the case though.

For fans at the top of cabinet, better configure it to push air out of the cabinet as hot air tends to rise up, better not go against physics.
CPU cooler fans are push-pull.