750W power supply for GTX 980 ti?

[DarkDaedricLord]

I've got a 750w power supply from my old build and want to know if it will be enough to run a gtx 980 ti plus my build in the bottom right.

 

[N3rdR4ge]

yeah thats what im running mine on. 750 is absolutely enough. Refer to my bottom right.

 

[Bossyfins]

750 wattage is right. BUT, make and model is important.

 

[daniel_blacke]

Yep, more than enough...

 

[photonboy]

http://www.guru3d.com/articles-pages/nvidia-geforce-gtx-980-ti-review,8.html

"System Wattage with GPU in FULL Stress = 332 Watts"

Even if you add in some peripherals, overclock etc you're likely not going to go much above 400Watts. I usually tell people to aim for the 50% to 60% range ideally (PSU fan noise, stress on PSU etc).

So you're pretty much EXACTLY where I recommend.

 

[Deleted member 217926]

750 wattage is right. BUT, make and model is important.

^ This. It depends on the unit. Make and model? Age will also matter if you are talking something 7 or 8 years old or older.

 

[i7Baby]

There are pretty horrible power supplies out there. For a gtx970, I'd want to look after it. I'd get a PSU from tiers 1 or 2 of http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html#xtor=EPR-8886

Its not just wattage but things like voltage ripplle and short circuit protection and having a single 12v rail that make it worth investing in better 'insurance' for high end PCs.

 

[terry4536]

I agree. Don't go cheap on the power supply (especially when you have $500+ in just the graphics card.).

 

[terry4536]

I would recommend a Seasonic, XFX, or EVGA 750 watt power supply. This EVGA unit is a great buy.

EVGA SuperNOVA 750 G2 220-G2-0750-XR 750W ATX12V / EPS12V SLI Ready 80 PLUS GOLD Certified Full Modular Power Supply Intel 4th Gen CPU Compatible 10 Year Warranty $105 after rebate
http://www.newegg.com/Product/Product.aspx?Item=9SIA24G28N0668

 

[4745454b]

Going by that ~325W figure, any QUALITY 500-550W unit will do. If you have a good 750W that you trust then there is no need to replace it.

I usually tell people to aim for the 50% to 60% range ideally (PSU fan noise, stress on PSU etc).

Not meaning to single you out, but I really want to start addressing this. Lets look at a load chart.

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=426

What is the efficiency at 50% load? 90.4%? What is the 80% load which is the max of what I suggest? 89.1? Less then 1.5% difference? 50-80% is more of less the same when it comes to load efficiency. You are generally within spitting distance of each other. I prefer to more load up my PSUs because in general lower wattage units are cheaper, and they will have better idle efficiency. An at idle or just surfing computer usually needs just over 100W. For a 750W unit this is below the 20% load where 80+ cares about. Depending on model, efficiency can be lower then 82%. Looking at the one I linked at random it's around 82%. If you select a ~500W unit then 100W starts at 20% load, so you know you have to be getting AT LEAST 82%, better depending on unit. Figuring out your wattage is a good idea. (400W) Doubling it so you stay at 50% under load is less of a good idea. (850W)

 

[darozc17]

Thats PLENTY of power I have two gtx 770's running on a 750 watt PSU...

 

[Deleted member 217926]

Going by that ~325W figure, any QUALITY 500-550W unit will do. If you have a good 750W that you trust then there is no need to replace it.

I usually tell people to aim for the 50% to 60% range ideally (PSU fan noise, stress on PSU etc).

Not meaning to single you out, but I really want to start addressing this. Lets look at a load chart.

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=426

What is the efficiency at 50% load? 90.4%? What is the 80% load which is the max of what I suggest? 89.1? Less then 1.5% difference? 50-80% is more of less the same when it comes to load efficiency. You are generally within spitting distance of each other. I prefer to more load up my PSUs because in general lower wattage units are cheaper, and they will have better idle efficiency. An at idle or just surfing computer usually needs just over 100W. For a 750W unit this is below the 20% load where 80+ cares about. Depending on model, efficiency can be lower then 82%. Looking at the one I linked at random it's around 82%. If you select a ~500W unit then 100W starts at 20% load, so you know you have to be getting AT LEAST 82%, better depending on unit. Figuring out your wattage is a good idea. (400W) Doubling it so you stay at 50% under load is less of a good idea. (850W)

^ Yep. Totally correct. 750 watts would be for Sli 980s. A 980 Ti needs a recommended 600w unit and that leaves headroom for overclocking or a lower quality model.

http://www.realhardtechx.com/index_archivos/Page362.htm

 

[i7Baby]

No-one's mentioning makes or models.

 

[4745454b]

Well I did say a QUALITY unit.

 

[terry4536]

No-one's mentioning makes or models.

I recommended the 750 Watt EVGA G2 for $105 after rebate. A quality modular 500 -650 watt power supply is maybe $30 cheaper. So why the debate?

 

[i7Baby]

I was hoping to hear from the OP plus anyone else saying they are running a 750W PSU who has posted in this thread.

eg"Thats PLENTY of power I have two gtx 770's running on a 750 watt PSU..."

"yeah thats what im running mine on. 750 is absolutely enough. Refer to my bottom right." - has got a XFX Pro 750W Black Edition - which is great.

 

[DarkDaedricLord]

it is the exact same one as N3rdR4ge

 

[terry4536]

I was hoping to hear from the OP plus anyone else saying they are running a 750W PSU who has posted in this thread.

eg"Thats PLENTY of power I have two gtx 770's running on a 750 watt PSU..."

"yeah thats what im running mine on. 750 is absolutely enough. Refer to my bottom right." - has got a XFX Pro 750W Black Edition - which is great

No problem here.

I have just never understood the necessity to insist that the manufacturers recommended watts are wrong (always). I don't know how many times that I've read that a particular high end graphics cards runs just fine on 250-300 watts even though those same graphics cards require additional power cables that aren't even available on the low wattage power supplies.

I really don't believe that there is a vast conspiracy for us to spend an extra $50 on power supplies.

 

[Bossyfins]

it is the exact same one as N3rdR4ge

Then you are set. Have fun

 

[DarkDaedricLord]

it is a xfx pro 750w and it cost about $150 AUD (around $100 US)

 

[i7Baby]

Then you'll be fine.

 

[4745454b]

And seeing as you already have there is no point to spending more on a different one. Use it, you'll be fine.

I have just never understood the necessity to insist that the manufacturers recommended watts are wrong (always).

They are "wrong" because they are only covering themselves. Look at any 280X on Newegg. The PSU requirements when they are listed is always 750W. For a 250W TDP GPU? Why on earth would that be the case? I'm running a 280 on a 450W PSU, and any QUALITY 500-550W can handle the 280X. Manufacturers always list way more PSU then really needed to make up for the junk PSUs that people buy. Some people see a "750W" for $20 and think they are getting a great deal. I won't even let those PSUs into my house, let alone my computer case. (I'm serious, I don't let junk PSUs get plugged into my place.)

 

[terry4536]

And seeing as you already have there is no point to spending more on a different one. Use it, you'll be fine.

Quote:
I have just never understood the necessity to insist that the manufacturers recommended watts are wrong (always).


They are "wrong" because they are only covering themselves. Look at any 280X on Newegg. The PSU requirements when they are listed is always 750W. For a 250W TDP GPU? Why on earth would that be the case? I'm running a 280 on a 450W PSU, and any QUALITY 500-550W can handle the 280X. Manufacturers always list way more PSU then really needed to make up for the junk PSUs that people buy. Some people see a "750W" for $20 and think they are getting a great deal. I won't even let those PSUs into my house, let alone my computer case. (I'm serious, I don't let junk PSUs get plugged into my place.)

I only use good quality power supplies myself. I am a firm believer in never going cheap on power supplies. It doesn't make sense to put a cheap power supply in an otherwise expensive computer.

But my point is that the price difference in the same quality power supply at 650 watts and one at 450 watts is probably on the order of $25 - $50. That is pretty insignificant cost in a $1000 -$2000 computer So I say again "Why the debate?".

 

[4745454b]

Read what I wrote above again then. $25 more now, plus more in electrical costs over time due to lower efficiency at sub 20% loads. (surfing, watching youtube/netflix, typing papers, etc.) Over 5-7 yrs this will be a lot more then a few bucks.

If you are planning on running a massive system, quad CF/SLI for example then obviously this can't be avoided. but running a 750W PSU when a 500W will do isn't going to pay off.

 

[Deleted member 217926]

Is this pc build good to go? New to pc gaming community. 
Processor : Intel i5 4690 (non-k version) 
Motherboard : AsRock H97M PRO4 RAM : Avexir white 2x4GB 1600mhz HDD : WD 1TB Caviar Blue  
Graphic Card : GTX980TI Reference Power Supply : CM V650 (80+ GOLD)  
Casing : Aerocool xpredator x1
Keyboard Mouse : CM Devastator 
Extra Fans : NZXT FN120 V2 x2 
CPU Coolers : Scythe Katana 4 
Any suggestion is welcomed. (Try to be as low cost as possible)
Will cpu bottleneck 980 ti?
Can the psu handle 980 ti?
thx

You should start a new thread.