Temporary PSU question

[evilmark443]

Last week I decided to upgrade my RX 570 to a RTX 2080 Super, and since I'm currently using a 550w PSU I ordered a new PSU as well (Corsair RM750x). The new graphics card has arrived already, but it could be a few days before the new PSU arrives, so I'm wondering if the 550w would work temporarily until the 750w gets delivered? Would it be safe? Would it boot?

 

Normally I would just be patient about it, but the graphics card I ordered is the first blower model I've ever used and after making the purchase I started reading about temperature and noise complaints involving that style of cooling, so I'm getting a bit anxious and trying to decide if I should look into aftermarket GPU cooling options which is making it difficult to be patient with the PSU delivery. My PC specs are:

 

Processor: Ryzen 5 3600x (stock cooler)

Motherboard: MSI B450 Gaming Plus

RAM: 32 GB

Storage: 2 SSDs and 1 HDD

Case fans: 4 120mm

PSU: Corsair RM550x

 

Since it probably matters I have not overclocked the CPU, and I have no plans to overclock the GPU either.

[LIGISTX]

9 minutes ago, evilmark443 said:

Last week I decided to upgrade my RX 570 to a RTX 2080 Super, and since I'm currently using a 550w PSU I ordered a new PSU as well (Corsair RM750x). The new graphics card has arrived already, but it could be a few days before the new PSU arrives, so I'm wondering if the 550w would work temporarily until the 750w gets delivered? Would it be safe? Would it boot?

 

Normally I would just be patient about it, but the graphics card I ordered is the first blower model I've ever used and after making the purchase I started reading about temperature and noise complaints involving that style of cooling, so I'm getting a bit anxious and trying to decide if I should look into aftermarket GPU cooling options which is making it difficult to be patient with the PSU delivery. My PC specs are:

 

Processor: Ryzen 5 3600x (stock cooler)

Motherboard: MSI B450 Gaming Plus

RAM: 32 GB

Storage: 2 SSDs and 1 HDD

Case fans: 4 120mm

PSU: Corsair RM550x

 

Since it probably matters I have not overclocked the CPU, and I have no plans to overclock the GPU either.

It’s close.... it’ll likely be fine. But, def cutting it close. I expect that PC in game load to draw about 450 watts max, likely 400 max honestly. So assuming it’s a newish 550, it’ll be fine. Just wouldn’t want to run it for a long time, but seeing as you have a new PSU coming, that won’t be an issue. 

[TheHokagePanda]

You’re fine to build it with the 550. It won’t pull more power unless overclocked, and the CPU and MB aren’t super high power consuming to begin with.

 

That being said.... you don’t have any wiggle room, so leave everything pretty standard with the OC settings until your new PSU comes in.

[LIGISTX]

Actually, hmm. I bet a 3600 uses even less watts than I’m accounting for. You may not even go over ~370-380. My old 8700k @5ghz and 2080 @2025 and all associated fans and water pump didn’t ever break 400-410 watts. My 9900k @5ghz can hit 450 in games, but usually down in the high 300’s low 400’s. Just for reference...

 

A 2080s will draw a bit more power, but your 3600 will draw a lot less than my 9900k. Either way. Should be fine. 

[TheHokagePanda]

2 minutes ago, LIGISTX said:

Actually, hmm. I bet a 3600 uses even less watts than I’m accounting for. You may not even go over ~370-380. My old 8700k @5ghz and 2080 @2025 and all associated fans and water pump didn’t ever break 400-410 watts. My 9900k @5ghz can hit 450 in games, but usually down in the high 300’s low 400’s. Just for reference...

 

A 2080s will draw a bit more power, but your 3600 will draw a lot less than my 9900k. Either way. Should be fine. 

250w for the GPU

65w for the CPU

70w for the MB

 

Everything else is just a few watts here and there. You were pretty close on your 400-450 estimate. But assuming his PSU isn’t from the dark ages, it’ll be fine for a few days. (Not a recommendation to use a 550 instead... it works but it’s not ideal).

[DailyProcrastinator]

Welcome to the forum!

19 minutes ago, evilmark443 said:

RTX 2080 Super

Processor: Ryzen 5 3600x (stock cooler)

Motherboard: MSI B450 Gaming Plus

RAM: 32 GB

Storage: 2 SSDs and 1 HDD

Case fans: 4 120mm

PSU: Corsair RM550x

 

PSU calculator estimates around 500W, but that is not a real world scenario, all components will not simultaneously draw at their max load. I bet at MAX load you would never pull over 425W. So no concerns here. In all honesty you could keep that RM550x, solid PSU as well. 

 

For reference my system is estimated at 675W, I have never pulled more than 500W. 

[evilmark443]

Thanks for the help everyone, I'll go ahead and put the new card in and see how it runs. The 550W I have now is only a few months old, just built the PC back in April. I would have gone with a 750W then (with PSUs I like to go above what's recommended) but Amazon and Newegg were both sold out of the 750w model at the time.

[evilmark443]

Seems to run just fine for now with the 550W PSU, and the most graphically intense game I have installed atm (RDR2) only got it up to 70 degrees so I guess I don't have to worry about temps. It starts sounding like a leaf blower at around 55-60 degrees though so I got some thinking to do regarding aftermarket coolers ... I don't really want to void the warranty but idk if I'll be able to get used to this noise.

 

Anyway, thanks again for the help everyone!