Will 650W suffice? Not sure.

[Morgan MLGman]

Hello there, I am not 100% sure whether a 650W PSU will be enough for this system as it's a rather weird combination.

 

I need to pick a new PSU for my friend's rig, relevant specs:

 

i7-870 which I intend to overclock as far as I can to keep up with the new GPU (old AF but also power-hungry, according to this test http://www.tomshardware.com/reviews/p55-motherboard-overclock,2460-7.html )

Sapphire RX 580 8GB Nitro+

8GB of DDR3-1333 RAM

2TB HDD, 120GB SSD

5 case fans total

 

My friend is budget-limited and the only decent units he can get are maximum 650W (XFX Pro XXX 650W, EVGA GQ 650W, XFX Core 650W non-modular, Be Quiet! PowerZone 650W)

 

Will that wattage suffice? From what I've seen, that CPU is a power-hog once it's OC'd and the high-clocked RX 580 8GB variant isn't too good in that regard either...

And I need to OC the CPU because at its low stock clock speeds it won't be able to keep up with the RX 580, even at 2560x1080.

 

It definitely is enough at stock speeds, it's overclocking that gets me a little worried. I might be tempted to OC the GPU too.

 

Thoughts?

[Sir Asvald]

I'm sure it'll be fine. 

[MVPernula]

I'm pretty sure you'll be fine.

Personally using a 5820K, GTX 1080, 4 drives and lots of RAM. Everything is heavily overclocked and 650W is basically what I max out on.

[Morgan MLGman]

7 minutes ago, Abdul201588 said:

I'm sure it'll be fine. 

 

6 minutes ago, MVPernula said:

I'm pretty sure you'll be fine.

Personally using a 5820K, GTX 1080, 4 drives and lots of RAM. Everything is heavily overclocked and 650W is basically what I max out on.

Even considering this? His CPU can do around 4,2GHz stable.

and this (those values are at stock, so keep in mind potential OC)

 

Will it still be enough? I also believe that it's gonna be fine as I ran an OC'd FX-8350 and an OC'd R9 290X under a Corsair TX 650 V2 PSU without issues or anything

[Princess Luna]

It will be enough, I'd be worried only if it was a FX-9530/9590.

[Damascus]

I run a 1700 + 1070 + 5 fans + D5 vario + 5 RGB strips on a 550W PSU

[Zando_]

You’ll be fine. I run an i5 and power hungry 980 Ti off a 450W PSU. 

[Morgan MLGman]

Just now, Princess Cadence said:

It will be enough, I'd be worried only if it was a FX-9530/9590.

The i7-870 isn't efficient though Look at the graph above what happens with its power consumption  once it's OC'd & overvolted.

Just now, Damascus said:

I run a 1700 + 1070 + 5 fans + D5 vario + 5 RGB strips on a 550W PSU

Well, that's quite a bit more efficient setup though I ran an FX-8350 @4,5GHz + R9 290X 4GB @1150core/1450mem on a Seasonic-based 650W PSU without issues as well, I just want to make sure that this combo is good enough for long gaming sessions with a 650W PSU  

[david cassar]

2 minutes ago, Morgan MLGman said:

The i7-870 isn't efficient though Look at the graph above what happens with its power consumption  once it's OC'd & overvolted.

Well, that's quite a bit more efficient setup though I ran an FX-8350 @4,5GHz + R9 290X 4GB @1150core/1450mem on a Seasonic-based 650W PSU without issues as well, I just want to make sure that this combo is good enough for long gaming sessions with a 650W PSU  

If you get a quality 650w power supply like an evga gq650w you will be absolutely fine  

[Princess Luna]

Just now, Morgan MLGman said:

The i7-870 isn't efficient though Look at the graph above what happens with its power consumption  once it's OC'd & overvolted.

I know how inefficient it is, I think that 500~550 could render occasional shut downs on peak however 650w will be enough unless you'll put like 3 or more 7200rpm HDD's those consume quite the power... I'd say you are on the "safe limit" for extended usage OC'ed should nothing else be changed to add more power consumption.

[Morgan MLGman]

1 minute ago, david cassar said:

If you get a quality 650w power supply like an evga gq650w you will be absolutely fine  

 

1 minute ago, Princess Cadence said:

I know how inefficient it is, I think that 500~550 could render occasional shut downs on peak however 650w will be enough unless you'll put like 3 or more 7200rpm HDD's those consume quite the power... I'd say you are on the "safe limit" for extended usage OC'ed should nothing else be changed to add more power consumption.

Alright, thanks guys, marking the thread as solved

[Damascus]

More efficient yes but the 1700 runs at 4.0ghz and the 1070 is watercooled with a high power ceiling.  The gpu is probably taking about ~200 and the 1700 will take upwards of 100W when OC'd.  Plus my PSU is 100w smaller.

[knightslugger]

7 minutes ago, Damascus said:

More efficient yes but the 1700 runs at 4.0ghz and the 1070 is watercooled with a high power ceiling.  The gpu is probably taking about ~200 and the 1700 will take upwards of 100W when OC'd.  Plus my PSU is 100w smaller.

The only time i've ever broken the 390W at the wall that my UPS can deliver is when my 1700X was hitting 4.025GHz on all cores and my 1070 FTW was overclocked to the moon. That's with 5 fans, water pump, a pair of HDDs, an NVMe drive, and some RGB.

[Billy_Mays]

More than fine

[STRMfrmXMN]

You can run any single GPU setup these days with a 650W PSU.