What PSU should I buy?

[Eng_Heisenberg]

Hi

I was decided to buy an EVGA Supernova p2 650W, but, after I read some reviews about this model, I discovered that it doesn't have over temperature protection (OTP). Should I be worried about this detail and buy another PSU?

Well, then I looked at the Corsair RM650i. It is as good as evga with ripple suppression, but there isn't a bypass relay to keep the thermistor cool, so I think it is not a good choice (correct if I am wrong). Then I looked the Seasonic x650. It has OTP, bypass relay, but the ripple suppression is not as good as the evga and corsair. So, I can't find the perfect 650w psu. What should I do?


Thanks very much =)

 

[Dark Lord of Tech]

750W P2 is way more than enough power for a single card setup. Also read my LAST STATEMENT ABOVE ^

 

[Eng_Heisenberg]

750W P2 is way more than enough power for a single card setup. Also read my LAST STATEMENT ABOVE ^

the 850w is cheaper hehehe

 

[turkey3_scratch]

750W P2 is way more than enough power for a single card setup. Also read my LAST STATEMENT ABOVE ^

the 850w is cheaper hehehe

The 650W is even cheaper. And perfectly fine for a second GTX 1070.

 

[Eng_Heisenberg]

750W P2 is way more than enough power for a single card setup. Also read my LAST STATEMENT ABOVE ^

the 850w is cheaper hehehe

The 650W is even cheaper. And perfectly fine for a second GTX 1070.

I don't plan to buy a second GPU, maybe replace the 1070 in the future for something better like 1080 or a new model that will be releases in future (1170, maybe, hehe)

The point is that I was decided to buy the P2 650W, but now I am very worried about the lack of OTP =(

 

[turkey3_scratch]

There's no reason to be worried.

 

[Eng_Heisenberg]

Wait why are you even concerned about inrush current? Firstly, I must dispel the notion that your computer hardware affects inrush current. What is connected to the PSU has no effect. Inrush current is solely related to the primary side of the power supply, not the secondary. Also, case fans use like 1W each so all those case fans in total use like 5W. In fact, your system there should have a gaming power consumption around 235W and max load should be around 275W; not high at all. So there's no reason to look into a power supply above 550W IMO. 450W is perfectly fine. Let me break down a gaming scenario for you:

GTX 1070: 150W
I7-6700: 70W
Other stuff: ~25W

So yeah you're looking at about 245W when gaming, I'll bump up my previous estimate a bit. So if you want your PSU to be cool, get one that will be more efficient for your type of load, which would be a ~500W power supply so 450W or 550W will work.

Hi

I read that voltage stabilizers are bad to PSU because they switch between voltage outputs. So, when there is an swicth, the voltage in the input of the PSU downs to zero for some miliseconds. So, the thermistor, as it is hot, has at this moment low resistence, so the inrush current is high and I read that It can cause damage to the PSU.

 

[turkey3_scratch]

-snip-

Hi

I read that voltage stabilizers are bad to PSU because they switch between voltage outputs. So, when there is an swicth, the voltage in the input of the PSU downs to zero for some miliseconds. So, the thermistor, as it is hot, has at this moment low resistence, so the inrush current is high and I read that It can cause damage to the PSU.

You're just overworrying I think. If a bypass relay was necessary Corsair's engineers would have implemented it.

 

[Eng_Heisenberg]

-snip-

Hi

I read that voltage stabilizers are bad to PSU because they switch between voltage outputs. So, when there is an swicth, the voltage in the input of the PSU downs to zero for some miliseconds. So, the thermistor, as it is hot, has at this moment low resistence, so the inrush current is high and I read that It can cause damage to the PSU.

You're just overworrying I think. If a bypass relay was necessary Corsair's engineers would have implemented it.

So, which PSU would you buy? evga supernova p2 650w or corsair rm650x?

 

[turkey3_scratch]

Well if buying an RMx I'd get the 550W.

 

[Eng_Heisenberg]

Well if buying an RMx I'd get the 550W.

Do you think RMx is better than P2?

 

[turkey3_scratch]

They're very similar but the P2 650 has teeny better performance than the RM650x and is more efficient. Between the two for the same price I'd take the P2 no question. Only thing I warn you about is if you run multiple hard drives the 100mm length between each SATA header I've found to be troublesomely short on EVGA units.

 

[Eng_Heisenberg]

They're very similar but the P2 650 has teeny better performance than the RM650x and is more efficient. Between the two for the same price I'd take the P2 no question. Only thing I warn you about is if you run multiple hard drives the 100mm length between each SATA header I've found to be troublesomely short on EVGA units.

Well, if you ensure I should not be woried about OTP, I think I should buy, then, EVGA p2.

 

[Eng_Heisenberg]

BTW, what do you think about Seasonic x750?

 

[Dark Lord of Tech]

RMX 650.

 

[Eng_Heisenberg]

RMX 650.

Why?

 

[Dark Lord of Tech]

Because in my opinion they are superior , and owning 2 of them , I know how great they perform.

 

[Eng_Heisenberg]

Because in my opinion they are superior , and owning 2 of them , I know how great they perform.

Don't you think 550w is enough for me?


Besides, I still have a great difficulty to choose between p2 and rmx. P2 lacks OTP and rmx lacks bypass relay. Btw, take a look at this:

http://www.tomshardware.com/reviews/corsair-rm650x-psu,4611-3.html

Here it is shown that is used just a thermistor for inrush priotection.

 

[Dark Lord of Tech]

Yes it is , plenty of power.

 

[turkey3_scratch]

Because in my opinion they are superior , and owning 2 of them , I know how great they perform.

You can't tell how a PSU performs just because it works. For PSUs that should probably last 15 years for most people having it working for some months is no great accomplish nor any indication it is great. If you're talking about the functionality aspect then first-hand experience may help.

I'd also pick the RM550x though - saves money over the 650 P2.

 

[Dark Lord of Tech]

Yes I can I monitor it to see how it performs when it's in use.

 

[Dark Lord of Tech]

They are very stable , rails are rock solid.

 

[Eng_Heisenberg]

Because in my opinion they are superior , and owning 2 of them , I know how great they perform.

You can't tell how a PSU performs just because it works. For PSUs that should probably last 15 years for most people having it working for some months is no great accomplish nor any indication it is great. If you're talking about the functionality aspect then first-hand experience may help.

I'd also pick the RM550x though - saves money over the 650 P2.

Thanks for the tip. Looking at amazon, rm550x is some cents cheaper than the rm650x, so I 650 would be better in this case. Unfortunately, I am still worried about the lack of bypass relay since, I think the thermistor should be kept cool.

Damm. I am realy In doubt about this little problems in P2 and RMx.

 

[turkey3_scratch]

If you have specific questions go to Jonnyguru.com since Jonnyguru works for Corsair so you can ask him about the bypass relay.

 

[Eng_Heisenberg]

If you have specific questions go to Jonnyguru.com since Jonnyguru works for Corsair so you can ask him about the bypass relay.

Humm, thanks for the tip, and sorry for annoying you with my worries bout the psu.

 

[Hnoor]

Hello,

Can you guys help me as well.

Which one should i buy. (Or which one is better... or are both really bad ? )

1)CORSAIR CS650M 650W ATX12V v2.4 and EPS 2.92 80 PLUS GOLD
or
2)Thermaltake SMART DPS 750W GOLD Semi-Modular (PS-SPG-0750DPCGEU-G)