Question 450W psu with gtx 1080?

jorokitaeca

Prominent
Aug 21, 2019
14
0
510
0
I was wondering if I could possibly use a gtx 1080 with my p450b gigabyte power supply.I've got a b450 tomahawk max a ryzen 5 3500 16 gigs of ddr4 3200mhz ram and i've got no fans on my case tho. It's the
gtx evga 1080 sc one by the way. I know it needs two 8 pins but ive got a 6+2 one but I do know that i could get an 8 pin to a two 6+2 pin "adapter". I won't be pushing the gpu too much since my monitor is only 60hz. Would this work but blow up in a matter of days or would it just not boot?
 

jorokitaeca

Prominent
Aug 21, 2019
14
0
510
0

Krotow

Commendable
Oct 2, 2019
898
224
1,290
15
I was wondering if I could possibly use a gtx 1080 with my p450b gigabyte power supply
Forget about it. Get proper 550-650W PSU. No lower than Tier C, but better from Tier A/B. You certainly will not want to ruin this GPU. Especially in current situation in GPU market.


would 550 watts be sufficent im on a tight budget
Yes, BUT then PSU must be certainly good. Tier A or at least Tier B know as good model from known PSU reviewers. And forget about mechanic HDDs and zillion RGB disco lights then.
 
Reactions: Dean0919

Zerk2012

Titan
Ambassador
Your power supply should have 2X 6+2 pin connectors for the video card already. 2 connectors on one cable.

Video card the GTX 1080 just draws about 180 watts that model might draw a bit more since it's overclocked, 65 watt processor probably closer to 80 under load, about 60 for the rest.

Puts the PC at about 320 watts under load!

The PSU claims to put out 432 watts on the 12 volt rail.


Not sure about the quality and using it but people are way overestimating the power draw.

EDIT from the picture it just needs one 8 pin connector.
 
Last edited:

Krotow

Commendable
Oct 2, 2019
898
224
1,290
15
Not sure about the quality and using it but people are way overestimating the power draw.
People doesn't want to recommend PSU which will apparently brownout and cause glitches from unstable system to magic smoke. Because OP claim that he can't afford good PSU, then more powerful cheaper grade 600-650W PSU which will ripple and sag less where proper 550W PSU will still stand strong is obvious choice. I still hope that OP will omit two dozen future beer bottles and pick up better PSU. GPU that he mentioned is too good for frying. Especially now.
 
Reactions: Dean0919

Zerk2012

Titan
Ambassador
I have run a 1080 on a 450w PSU before, it works.

The P450B is not a very good unit AT ALL if its anything like its 550w sibling.
Gigabyte P550B Power Supply Review | Tom's Hardware

View: https://imgur.com/LpMyVjB


If it was a strong quality 450w I would say its fine. But this unit? Can't reccomend.
From this it has all the protections. The actual settings for the protection could be questionable as with ALL power supplies.
https://www.gigabyte.com/us/Power-Supply/GP-P450B#kf

I never stated to use it But people are telling him it needs a ridiculous amount of power.

They actually list the hold up time as 16ms on the product page. To me it's a bit nit picking 17 NO but 16ms.

That PC would draw about 70% of a good 450 watt power supply under full load LOL.
 
Last edited:

hotaru.hino

Commendable
Sep 1, 2020
1,564
487
1,640
35
The systems I've had a GTX 1080 in didn't pull more than 230W-250W from the wall. Given these were 80Plus Gold units, this really comes down to about 210W-225W the computer actually needed. Also said systems were coupled with a Intel Core i7-6700 and a Ryzen 2700X.

As long as the 450W unit is a quality unit, I see no problem using it.
 

Zerk2012

Titan
Ambassador
People doesn't want to recommend PSU which will apparently brownout and cause glitches from unstable system to magic smoke. Because OP claim that he can't afford good PSU, then more powerful cheaper grade 600-650W PSU which will ripple and sag less where proper 550W PSU will still stand strong is obvious choice. I still hope that OP will omit two dozen future beer bottles and pick up better PSU. GPU that he mentioned is too good for frying. Especially now.
So your saying you would buy a low quality 600 650 watt PSU instead of a good 450 watt that makes no since at all 0.
The 550 watt model of that they were able to pull over 600 watts and no smoke

1143.489A9.013A9.191A3.042A605.19480.304%243448.940.91°C0.992
11.853V4.994V3.232V4.932V753.62549.79°C115.09V
 

Krotow

Commendable
Oct 2, 2019
898
224
1,290
15
So your saying you would buy a low quality 600 650 watt PSU instead of a good 450 watt that makes no since at all 0.
The 550 watt model of that they were able to pull over 600 watts and no smoke
Did you read what I wrote? Good PSU are not cheap. Also some locations does not have good PSUs in local seller assortment and shipping them from retailers cost a price of second PSU. Check Amazon shipping prices outside US for example. I'm still for purchasing a good PSU (no lower than Tier B for OP configuration). But we don't know all circumstances in OP side. In case of anything better is to have a PSU which will not fizzle into oblivion on real 500W load.
 

Dean0919

Reputable
Oct 25, 2017
138
12
4,615
5
Don't cheap out on power supply. Power supply supplies electricity to all the components in your computer. It has very important role. Just get something good quality and at least 650watts power supply. I would not buy some shady power supply, especially if I would have such an expensive video card as GTX 1080.
 

ASK THE COMMUNITY

TRENDING THREADS