New PSU - recommendation

[Nighters]

Hi,
I have this rig:
Intel Core i5-4460
Kingston HyperX Beast 8GB (kit 2x 4GB) 1600MHz CL9 XMP
MSI Nvidia GTX 970
MSI Z97 GAMING 5
Seagate Desktop HDD 1TB
Samsung SSD 840 EVO - 120GB, Basic

Because my old (1,5 year old) PSU start make noise -> bad fan, so I RMA it and because shop didnt return PSU in RMA period, so they give me back money. Now I need new PSU. The old PSU was: Seasonic S12II-620W 80PLUS BRONZE. I am thinking about 6XXW PSU with Semi-pasiv fan (in low voltage, fan will stop) and maybe modular PSU.

I was thinking about this 2 PSU:
Corsair RM650x 650W
Seasonic S12G-650 650W Gold

But you can advise me another PSU. Thank you for every comment.

 

[Gingerbread]

Out of the both I would say Evga Supernova G2 650W. Pretty much the same price but better build quality quieter for sure.

 

[agustinromero]

Hi,

I do not know much about PSUs but this tier list is good and you can trust it http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html. The seasonic is in tier 2 which is really good. i do not know if they have semi-pasiv fans or whatnot but you could research among the top tiers to find something that suits you.

 

[gondo]

For your system a 650W is recommended. I'd go with the EVGA G2 series. The price/performance is unmatched and it has a 7 year warranty. There is also the P2 which is a step up with a 10 year warranty and can be had on sale for the price of a G2.

Check jonnyguru.com for reviews.

 

[TJ Hooker]

For your system a 650W is recommended.

500 W is recommended wattage for GTX 970.

 

[turkey3_scratch]

A high quality unit below.

PCPartPicker part list / Price breakdown by merchant

Power Supply: FSP Group Hydro G 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($81.50 @ Newegg)
Total: $81.50
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-03-08 11:06 EST-0500

Source of information: http://www.tomshardware.com/reviews/fsp-hydro-g-650-power-supply,4462.html

Another option is the Seasonic S12ii 520W:

PCPartPicker part list / Price breakdown by merchant

Power Supply: SeaSonic S12II 520W 80+ Bronze Certified ATX Power Supply ($55.99 @ SuperBiiz)
Total: $55.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-03-08 11:07 EST-0500

 

[Nighters]

Out of the both I would say Evga Supernova G2 650W. Pretty much the same price but better build quality quieter for sure.

But Evga G2 dont have semi-pasiv fan right?

 

[ko888]

EVGA SuperNOVA P2 650W 80+ Platinum Certified Fully-Modular ATX Power Supply
https://pcpartpicker.com/part/evga-power-supply-220p20650x1

 

[Karadjgne]

The 'eco mode' is questionable. Personally, I prefer to have the fan spin all the time, its barely if at all audible. With the semi passive, you are relying on a thermistor circuit to kick the fan on when it reaches a certain temp. If that fails, it would be all to easy to overheat the psu during a high load. A nice gimmick to have, but I'd not consider it a priority.

 

[turkey3_scratch]

Out of the both I would say Evga Supernova G2 650W. Pretty much the same price but better build quality quieter for sure.

But Evga G2 dont have semi-pasiv fan right?

They do have it, though.

 

[TJ Hooker]

The 'eco mode' is questionable. Personally, I prefer to have the fan spin all the time, its barely if at all audible. With the semi passive, you are relying on a thermistor circuit to kick the fan on when it reaches a certain temp. If that fails, it would be all to easy to overheat the psu during a high load. A nice gimmick to have, but I'd not consider it a priority.

Don't most PSUs have a fan speed profile linked to temperature, meaning they would all have something like a thermistor to track temperature changes?

 

[turkey3_scratch]

The 'eco mode' is questionable. Personally, I prefer to have the fan spin all the time, its barely if at all audible. With the semi passive, you are relying on a thermistor circuit to kick the fan on when it reaches a certain temp. If that fails, it would be all to easy to overheat the psu during a high load. A nice gimmick to have, but I'd not consider it a priority.

Don't most PSUs have a fan speed profile linked to temperature, meaning they would all have something like a thermistor to track temperature changes?

Only some PSUs which hook into a USB header on the motherboard allow you to control the fan speeds and create a custom profile. Thermistors don't exactly "track" temperature changes, they have physical, chemical properties that would allow them to regulate the fan speed based on the temperature of the air in contact with them.

 

[TJ Hooker]

I don't mean a fan profile that you can monitor/change yourself. But I thought most PSUs had a variable fan speed that would obviously need some sort method for detecting temperature changes. If the fan speed changes as temperature changes, then the fan speed is tracking the temperature. I know what a thermistor is.

 

[turkey3_scratch]

I don't mean a fan profile that you can monitor/change yourself. But I thought most PSUs had a variable fan speed that would obviously need some sort method for detecting temperature changes. If the fan speed changes as temperature changes, then the fan speed is tracking the temperature. I know what a thermistor is.

Then why did you ask it in question form if you already knew it?

 

[TJ Hooker]

I said I know what a thermistor is. What I don't know, but merely think, is that most PSUs have a variable fan speed, and therefore also likely have something like a thermistor in them. If that's the case, then Karadjgne's complaint about thermistors in semi-passive PSU fans doesn't make sense, because that complaint would apply equally to any variable fan speed PSU.

Alternatively, that's not the case, and I was hoping to someone would explain why that complaint doesn't apply to all PSUs, e.g. that they use some other method of tracking temperature changes.

 

[gondo]

Yes a 550W would power your system as mentioned above, for a bit of headroom and future proofing 650W comes recommended. Even more if you plan to crossfire/sli in the future.

Yes the EVGA G2 has Eco Mode. It can be turned on or off. It works great when turned on and is automatic, no USB headers required.

There are other good power supplies from Seasonic, Antec, Corsair, etc... but the EVGA is the go to nowadays. When in doubt choose an EVGA. Just like Asus Motherboards, benQ Monitors, Noctua Fans, etc.... If you don't know what you want those are always safe bets.

 

[Karadjgne]

In a semi passive psu, the fan does not spin at all until a certain temp is reached, at which point the fan goes into normal operation. Most psus, the fan is spinning constantly, low rpm for the most part, 120mm Fan, and gradually increases as psu temp rises. So if the fan in a semi passive doesn't kick in till say 40°, then instead of a nice, inaudible 400rpm, its kicking in at 60% duty cycle or around 1100 rpm. Not exact quiet. It's a trade off. Mostly you'll never hear the fan then 'poof' a bunch of noise. If you keep the psu, through load, around that 40° mark, the fan will cycle on/off. That's annoying. I'd rather have a constant hum I can tune out.

Either way, that part of the psu is a thermal switch, nothing more. Fan on or fan off. It'll be up to the Thermostat circuitry to decide the duty cycle per temp.