650w PSU good enough for a 980 Ti?

Humpernator

Weaksauce
Joined
Oct 23, 2015
Messages
112
I currently have an EVGA P2 650w PSU. Would I be pushing it with a EVGA 980 Ti SC? Will I still have room for overclocking? I'll be pairing it with either an i7-4770k or i5-4670k, haven't decided. Not too knowledgeable with PSU's so some advice/reassurance would be helpful.

Here are my specs. The i5 is listed right now but may use my i7-4770k if I have enough PSU to power it with OC.



PCPartPicker part list: Intel Core i5-4670K, EVGA GeForce GTX 980 Ti, Corsair 250D - System Build - PCPartPicker

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor (Purchased For $155.00)
CPU Cooler: Corsair H60 54.0 CFM Liquid CPU Cooler (Purchased For $49.99)
Motherboard: ASRock Z97E-ITX/ac Mini ITX LGA1150 Motherboard (Purchased For $119.99)
Memory: Corsair Vengeance Pro 8GB (2 x 4GB) DDR3-1866 Memory (Purchased For $45.99)
Storage: A-Data Premier SP600NS34 128GB M.2-2242 Solid State Drive (Purchased For $49.99)
Storage: Samsung 850 EVO-Series 1TB 2.5" Solid State Drive (Purchased For $257.59)
Video Card: EVGA GeForce GTX 980 Ti 6GB Superclocked+ ACX 2.0+ Video Card (Purchased For $450.00)
Case: Corsair 250D Mini ITX Tower Case (Purchased For $51.13)
Power Supply: EVGA SuperNOVA P2 650W 80+ Platinum Certified Fully-Modular ATX Power Supply (Purchased For $79.98)
Case Fan: Corsair SP120 57.2 CFM 120mm Fans ($10.50)
Case Fan: Corsair SP120 57.2 CFM 120mm Fans (Purchased For $10.50)
Case Fan: Corsair SP140 49.5 CFM 140mm Fan (Purchased For $15.99)
Total: $1296.65
 
Joined
Jul 30, 2009
Messages
847
You should be fine!

I run a TX650 on the rig in my sig and used the same PSU for my old oc'd 2500K with the oc'd 980ti. Never had an issue.

When I did the math you are at a ballpark 425-450 watts for your setup.
 

Humpernator

Weaksauce
Joined
Oct 23, 2015
Messages
112
You should be fine!

I run a TX650 on the rig in my sig and used the same PSU for my old oc'd 2500K with the oc'd 980ti. Never had an issue.

When I did the math you are at a ballpark 425-450 watts for your setup.

I find that PCPartPicker's estimates are pretty solid. I usually take that and add about +150w for overclocking, to be safe.
 

Daniel_Chang

[H]ard|Gawd
Joined
Jan 4, 2016
Messages
1,313
How about 980Ti SLI on that 650W PSU?

It will work, but it will be pushing it. We have a build on these forums where a guy is running 980 SLI (non-TI) off a 550W PSU and has some room to spare.

I'm known for telling people to not waste their money on too much of a PSU since it doesn't do anything for you. But if you plan to go 980ti SLI you should go with a 750W PSU, 850W if you plan to OC.
 

misterbobby

2[H]4U
Joined
Mar 18, 2014
Messages
3,814
It will work, but it will be pushing it. We have a build on these forums where a guy is running 980 SLI (non-TI) off a 550W PSU and has some room to spare.

I'm known for telling people to not waste their money on too much of a PSU since it doesn't do anything for you. But if you plan to go 980ti SLI you should go with a 750W PSU, 850W if you plan to OC.
You have no idea what his other specs are so 650 may not work at all.
 

Daniel_Chang

[H]ard|Gawd
Joined
Jan 4, 2016
Messages
1,313
You have no idea what his other specs are so 650 may not work at all.

Fair point. Generally, most people have 1-2 optical drives, 1-2 HDDs, a handful or fewer fans, etc. These generally use the 5v and 3.3v rails, whereas the CPU and GPU utilize the 12V rail(s). Unless he has an uncommon setup, he'll fall under the same general guidelines as anyone else.
 
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flatty

Limp Gawd
Joined
Feb 2, 2016
Messages
178
the mobo use itself somearound 50W, each RAM DIMM use 3-5 W, each fan 5-8, + HDD+ optical + + +, this outside we take in consideration "CPU and GPU"
 

Armenius

Fully [H]
Joined
Jan 28, 2014
Messages
28,238
It will work, but it will be pushing it. We have a build on these forums where a guy is running 980 SLI (non-TI) off a 550W PSU and has some room to spare.

I'm known for telling people to not waste their money on too much of a PSU since it doesn't do anything for you. But if you plan to go 980ti SLI you should go with a 750W PSU, 850W if you plan to OC.
Yeah, I'd go 750W minimum for 980 Ti SLI, but recommend 850W for some headroom whether or not you're overclocking.
 
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