Do I need 750W or 650W PSU?

[Bintu55]

Hi, I built a system 4 years ago and a few days ago my PSU(Corsair CX750) failed. I need to purchase a new PSU for my system. My friend mentioned that I don't need 750W PSU and added that my system will run very well with 650W PSU.

So here I am asking you experts to guide me please. Which PSU I should buy?

 

System specifications:-

• CPU : Intel core i7 4790K
• CPU Cooler : Corsair Hydro H60
• Motherboard : Asus Z97-A
• RAM : Corsair Vengeance 8 GB DDR3 x 4 = 32 GB
• Storage: 2 SSD + 1 TB 7200 rpm HDD 
• GPU: GTX 970
• Optical Drive: DVD-RW
• Monitor : 22inch LED monitor

PC Part Picker Link : https://in.pcpartpicker.com/list/Q3R4zY

 

I'm from India so I have very limited options to purchase PSU. Your guidance will immensely help me.

 

Thank you

 

 

[Princess Luna]

this system could run off even a 450w unit if it's a good one.

 

What are the best units from around the 500w~650w margin you can afford? list your options to us and we can tell you which one is the better pick.

[GoldenLag]

https://in.pcpartpicker.com/product/PVzZxr/corsair-txm-gold-650w-80-gold-certified-semi-modular-atx-power-supply-cp-9020132-na

 

Here is a good one

 

https://in.pcpartpicker.com/product/FdRFf7/corsair-cx-2017-550w-80-bronze-certified-atx-power-supply-cp-9020121-na

 

Here is a cheap but still decently good

 

https://in.pcpartpicker.com/product/2HbwrH/corsair-rmx-2018-650w-80-gold-certified-fully-modular-atx-power-supply-cp-9020178-na

 

Here is a very good one but on the expencive side.

 

Pick your poison. Entirely coincidental that they are all from corsair

[Bintu55]

Very few brands are available here offline and online. These brands are available here : Antec, Cooler Master, Corsair, DeepCool, and Thermaltake. Other 2-3 brands don't have those PSUs. 

[OrionFOTL]

We can't recommend any units if we don't know which units are available and for what price. Give us links to Indian online stores you can use, otherwise we'll be going back-and-forth with "is this unit available?" "no" "is that unit available?" "no" forever and may not land on an optimal choice.

[Bintu55]

Both TM-X and RMx models are little costlier than my budget.

Corsair CX750 which I had used costs INR 7.5K and these 2 costs more than INr 8.5K

 

However Corsair CX550 is very well within my budget. Are you sure that 550W is enough for my system?

[JoostinOnline]

I'm using a 550W PSU with a 4790k and a 980 Ti, along with more storage than you have. You'll be fine. You're probably using less than 300W at load.

[Bintu55]

1 minute ago, OrionFOTL said:

We can't recommend any units if we don't know which units are available and for what price. Give us links to Indian online stores you can use, otherwise we'll be going back-and-forth with "is this unit available?" "no" "is that unit available?" "no" forever and may not land on an optimal choice.

Okay sure.

Purchasing computer components here is ugly. We've got very limited options and most of the times the re-sellers sale imported stuff and thus some buyers end up without warranty if they are not aware. eBay used to be good but it got shut down. I will share few links which I think are good.

 

https://www.amazon.in/

https://www.flipkart.com/

https://www.theitdepot.com/

https://www.primeabgb.com/

https://mdcomputers.in/

[Bintu55]

2 minutes ago, JoostinOnline said:

I'm using a 550W PSU with a 4790k and a 980 Ti, along with more storage than you have. You'll be fine. You're probably using less than 300W at load.

That's wonderful to know. May I know which power supply do you use? And your experience with their support(if any)?

Thanks

[steelo]

On 4/22/2019 at 10:10 AM, Bintu55 said:

Hi, I built a system 4 years ago and a few days ago my PSU(Corsair CX750) failed. I need to purchase a new PSU for my system. My friend mentioned that I don't need 750W PSU and added that my system will run very well with 650W PSU.

So here I am asking you experts to guide me please. Which PSU I should buy?

 

System specifications:-

• CPU : Intel core i7 4790K
• CPU Cooler : Corsair Hydro H60
• Motherboard : Asus Z97-A
• RAM : Corsair Vengeance 8 GB DDR3 x 4 = 32 GB
• Storage: 2 SSD + 1 TB 7200 rpm HDD 
• GPU: GTX 970
• Optical Drive: DVD-RW
• Monitor : 22inch LED monitor

PC Part Picker Link : https://in.pcpartpicker.com/list/Q3R4zY

 

I'm from India so I have very limited options to purchase PSU. Your guidance will immensely help me.

 

Thank you

 

 

You should be fine with a 650W PS. I think even a 500W would be more than enough.

[JoostinOnline]

12 hours ago, Bintu55 said:

That's wonderful to know. May I know which power supply do you use? And your experience with their support(if any)?

Thanks

EVGA G2 550W. The one time I contacted support I thought they'd left a part out of the box (turns out I'd just misplaced it) and they said to register my power supply and they'd send me a replacement part for free. That being said, in my experience, getting good customer support is just a matter of treating the other person with respect, with the knowledge that they spend all day being yelled at by customers they didn't do anything to. Being extra nice to someone who's uses to getting yelled at means quick help.

 

11 hours ago, steelo said:

You should be fine with a 650W PS. I think even a 500W would be more than enough if it's bronze or gold certified. 

The efficiency has nothing to do with the amount of power supplied, just the amount drawn. Of course, any decent power supply should at least be bronze certified.

[steelo]

12 minutes ago, JoostinOnline said:

EVGA G2 550W. The one time I contacted support I thought they'd left a part out of the box (turns out I'd just misplaced it) and they said to register my power supply and they'd send me a replacement part for free. That being said, in my experience, getting good customer support is just a matter of treating the other person with respect, with the knowledge that they spend all day being yelled at by customers they didn't do anything to. Being extra nice to someone who's uses to getting yelled at means quick help.

 

The efficiency has nothing to do with the amount of power supplied, just the amount drawn. Of course, any decent power supply should at least be bronze certified.

 Absolutely. I always recommend at least bronze certified PSU which (if I recall correctly) waste 20% less electricity as heat. Heat=bad. Most knock off brands don't even offer that. It can be used as ONE indicator of whether or not it's a decent unit.

[JoostinOnline]

1 hour ago, steelo said:

 Absolutely. I always recommend at least bronze certified PSU which (if I recall correctly) waste 20% less electricity as heat. Heat=bad. Most knock off brands don't even offer that. It can be used as ONE indicator of whether or not it's a decent unit.

They're only rated at three points of load, so that's not necessarily accurate. Efficiency also says nothing about quality either. This techquickie is pretty old but it's still relevant:

 

[Crunchy Dragon]

14 hours ago, Bintu55 said:

Corsair CX550 is very well within my budget. Are you sure that 550W is enough for my system?

That's a solid unit.

 

I run a Ryzen 5 1600 and a GTX 780 off of a CX550M, it'll be plenty for your system.

[GoldenLag]

3 hours ago, steelo said:

 Absolutely. I always recommend at least bronze certified PSU which (if I recall correctly) waste 20% less electricity as heat. Heat=bad. Most knock off brands don't even offer that. It can be used as ONE indicator of whether or not it's a decent unit.

this is bad advice. certification is not indicative of the quality of the unit. meaning its not what you want to go by when choosing PSU (offcourse dont pair 550 watt PSUs with hardware that will draw 700 watts, but people rarely have that sort of system)

16 hours ago, Bintu55 said:

However Corsair CX550 is very well within my budget. Are you sure that 550W is enough for my system?

more than fine. many overestimate the wattage needed. its all about quality not wattage. 

16 hours ago, Bintu55 said:

That's wonderful to know. May I know which power supply do you use? And your experience with their support(if any)?

Thanks

the CX550 (2017) is a good cheap unit. 

 

[LukeSavenije]

3 hours ago, steelo said:

 Absolutely. I always recommend at least bronze certified PSU which (if I recall correctly) waste 20% less electricity as heat. Heat=bad. Most knock off brands don't even offer that. It can be used as ONE indicator of whether or not it's a decent unit.

except that they do... 80+ is just efficiency, not qualify.

 

and there are companies that actually sent in different units to 80+ than they sold, even big names

[LienusLateTips]

4 hours ago, steelo said:

 Absolutely. I always recommend at least bronze certified PSU which (if I recall correctly) waste 20% less electricity as heat. Heat=bad. Most knock off brands don't even offer that. It can be used as ONE indicator of whether or not it's a decent unit.

80+ doesn't mean it's a good unit, at all.

 

It just means it passed efficiency requirements.

[Bintu55]

@JoostinOnline@Crunchy Dragon

Thank you all for your much valuable inputs. After referring to new PSU tier list and price+availability of item here I have decided to purchase Antec - Earthwatts Gold Pro 550 W 80+ Gold Certified Semi-Modular ATX. 

 

Should I go ahead and make that purchase or you'd recommend something else?

 

Thanks

[Crunchy Dragon]

1 minute ago, Bintu55 said:

@JoostinOnline@Crunchy Dragon

Thank you all for your much valuable inputs. After referring to new PSU tier list and price+availability of item here I have decided to purchase Antec - Earthwatts Gold Pro 550 W 80+ Gold Certified Semi-Modular ATX. 

 

Should I go ahead and make that purchase or you'd recommend something else?

 

Thanks

That looks like a solid option.

[seon123]

5 minutes ago, Bintu55 said:

@JoostinOnline@Crunchy Dragon

Thank you all for your much valuable inputs. After referring to new PSU tier list and price+availability of item here I have decided to purchase Antec - Earthwatts Gold Pro 550 W 80+ Gold Certified Semi-Modular ATX. 

 

Should I go ahead and make that purchase or you'd recommend something else?

 

Thanks

There are two versions of it. How long is the warranty on the model you want to buy? Do you also have pictures of it from the retailer?

[Bintu55]

5 minutes ago, seon123 said:

There are two versions of it. How long is the warranty on the model you want to buy? Do you also have pictures of it from the retailer?

Wow I wasn't aware of that. I checked on two retailers websites.

 

Here is the link from where I want to buy :

https://www.primeabgb.com/online-price-reviews-india/antec-ea550g-pro-550w-80-plus-gold-certification-semi-modular-psu/

 

It shows me 3 years warranty on the retailer website. 

 

Amazon link : https://www.amazon.in/Antec-EA550G-PRO-Power-Supply/dp/B077GCHN1F

 

In QnA section on Amazon some people questioned about the version and warranty period of PSUs. Quiet shocking that some sellers are selling older version.