550W/600W enough for OC FX-8320 and OC GTX 970?

[Mortis Angelus]

I'm putting together a computer atm, and I am unsure if the PSU I have will be enough (from my old rig). The PSU in question is 600 W 80+, but it is very old.

I've read, though, that people recommend not to swap PSU if not needed, so I might not do that.

 

Anyhow, my question is: Will 600W be enough for OC:ing both an AMD FX-8320 towards 4.5 gHz and a GTX 970 STRIX at 1500 mHz (might not be doable to reach 4.5 gHz with only a Hyper 212 EVO, but for the sake of the question, let's just go with it)?

 

Why I ask about 550W is that I could get my hands on a Seasonic G550W for quite a good price too if needed to change.

 

This PSU calculator suggested a PSU of 623 W (see image below). Is it really that demanding? I guess I should go for a 750 W then, or at least a 650W? Or is the calculator exaggerating?

 

 

 

[Praesi]

A PSU shouldn´t run at full capacity. I would go with 750W

[WoodenMarker]

21 minutes ago, Praesi said:

A PSU shouldn´t run at full capacity. I would go with 750W

PSU calculators are for the most part, inaccurate. 

A decent 500w is already plenty for the system. 

The G 550 is an excellent option.

[STRMfrmXMN]

1 hour ago, Praesi said:

A PSU shouldn´t run at full capacity. I would go with 750W

750W is enough for two of OPs system and then some.

[Mohitb]

unless you plan on water cooling, don't expect to get an overclock for like that. for the power supply, a 550w would be sufficient, but I personally never go under a 750w just in case.

[Cerulis]

I have a OC Fx-8320@4.0, Gigabyte 1070, 2 Monitors, Corsair H110 Water Cooler and just one hard drive. My 600W PSU runs all of this without any problems.

If you didn't buy the 8320 already, I'd recommend trying to get a better processor since mine seems to be bottlenecking my rig in many new titles.

[LUUD18]

What brand is the PSU?

[Mortis Angelus]

3 hours ago, LUUD18 said:

What brand is the PSU?

First of all, thanks to all of you for replying. Really helpful information here!

 

Regarding the question: It is an  OCZ 600SXS Stealth Xtreme 600W 80+ bought in 2009.

 

I  tested the PSU yesterday together with the IT-technician at work and it is still basically in new condition according to the PSU-tester-tool. The only thing that was bad, was the fan, so we swapped that one out, and now the PSU is as silent as ever.

 

 

https://drive.google.com/open?id=0B4h7gCxYotfzQ21PVkotSElkSDlpcEJQd0VTM2lwYlM2UnFz

I just put together the system today, and it works like a charm for now (haven't begun to OC yet)

except the cooling; for some reason I have 40 degree Celsius at idle in BIOS, which is a bit alarming imo. Room temp was at 25 degree. I did expect better temps with an 212 EVO in push-pull-configuration....

 https://drive.google.com/open?id=0B4h7gCxYotfzY1hnTHBnU3RCcFE1c1NmYlM0V0dTNWFzem53

 

[LUUD18]

Did you put enough thermal paste?

[Mortis Angelus]

8 minutes ago, LUUD18 said:

Did you put enough thermal paste?

Hi,

 

I just overclocked the CPU to 4.2 GHz without any issues. I realiz now, that the bios-temp is rhe socket temp, which is allowed to go up towards 77 degree. 

 

Currently, att full load I have 68 degree socket temp and around 50 on core temp, so well within acceptable margins. My VRM seems to be the limiting factor at the moment, as I am unable to increase the vCore any further.

 

But thanks to all of you in this thread for helping me.

 

Oh, and I stuck with the original 600W PSU. Still going strong.

[LUUD18]

Those are really good temperatures! Did you stress test it with Prime95 or Aida64?

[Mortis Angelus]

23 minutes ago, LUUD18 said:

Those are really good temperatures! Did you stress test it with Prime95 or Aida64?

Prime95, Aida costs money.

 

The thing is that the mobo reduces voltages to about 1.3 during load, but stays around 1.38 - 1.4 during idle. So thus the temps are very low. Here you can read all about my OC-adventure, and the explenations for this voltage reduction: