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How much power is enough?

TahoeDust

TahoeDust

Limp Gawd
Joined
Dec 3, 2011
Messages
502
I am about to order the last parts I need to finish my "quasi-high end" intel build and am going to need a new PSU. I don't really trust the online PSU calculators and was wondering if you guys could tell me how much power you think I need.

i7 2700k
p8z68 deluxe
Sapphire HD 6950
16gb 2133 DDR3
OCZ Vertex 3 SSD
2 x 2tb 7200 Sata II HDD
BD Optical Drive

Can anyone recommend something modular that won't break the bank?
 
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TahoeDust said:
I am about to order the last parts I need to finish my "quasi-high end" intel build and am going to need a new PSU. I don't really trust the online PSU calculators and was wondering if you guys could tell me how much power you think I need.

i7 2700k
p8z68 deluxe
Sapphire HD 6950
16gb 2133 DDR3
OCZ Vertex 3 SSD
2 x 2tb 7200 Sata II HDD
BD Optical Drive

Can anyone recommend something modular that won't break the bank?
Click to expand...

CPU ~ 120W
VGA ~ 200W
the rest ~ 50W

PCP&C Silencer MKIII 500
PCP&C Silencer MKIII 600
Seasonic X 560
Thermaltake XT 575
Antec TPN 550
OCZ ZT 550
Rosewill Hive 550
Thortec Thunderbolt 650(this will run two 6950s in CFX)
 
Thanks for the suggestions guys. So, 550w for what I have listed. I am thinking I should leave room for the possibility of going SLI/Crossfire in the future. Would a 750w be what I should be looking for?

That Thortec Thunderbolt 650 looks nice, if your sure that would be enough.
 
TahoeDust said:
Thanks for the suggestions guys. So, 550w for what I have listed. I am thinking I should leave room for the possibility of going SLI/Crossfire in the future. Would a 750w be what I should be looking for?

That Thortec Thunderbolt 650 looks nice, if your sure that would be enough.
Click to expand...
650-750W is enough for Crossfire. Just look for the 750W models of any of the PSU models Profumo or I suggested.
nicklemarr said:
http://educations.newegg.com/tool/psucalc/index.html
Click to expand...
That calculator is wrong.
 
It also feels like newegg are slightly biased when it comes to the question "Do I need a new PSU?". ;)
 
Hello, even though you have received excellent suggestions from fellow Forumites above, may I just say that simply buy the best PSU you can afford.

Sadly, this is one area where to many builders takes shortcuts on, and in my opinion, this forms the backbone of any system.

I would really go for a good quality (and the highest wattage that you can afford), something like the Seasonic Gold or Platinum series, and always remember to look for PSU's that are rated at their specific output at 50 deg C, vs the more common 25 deg C rating.

Enjoy, and keep us posted :)
 
MrBean_Oz said:
Hello, even though you have received excellent suggestions from fellow Forumites above, may I just say that simply buy the best PSU you can afford.

Sadly, this is one area where to many builders takes shortcuts on, and in my opinion, this forms the backbone of any system.

I would really go for a good quality (and the highest wattage that you can afford), something like the Seasonic Gold or Platinum series, and always remember to look for PSU's that are rated at their specific output at 50 deg C, vs the more common 25 deg C rating.

Enjoy, and keep us posted :)
Click to expand...

This is the best advise. It's what I do. You spent big money on great parts. Get a PSU of the same caliber.
Oh, and I forgot to say that this the big [H]. There's no such thing as too much power.
 
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There's no such thing as too much power.
Click to expand...

Back in the early 90's, when I did some drag-racing, I had an old adage -> " How much power is enough?" and of course, the answer always ended up " To much"

I was tempted to give this answer :)

But yes, as you have also alluded to, this is where a system is made, or broken.....I have this PC P&C Turboccol 1KW unit in my Blackbird, and, through various builds over the last 5 1/2 years, I have not had one BSOD under any circumstances - admittedly, I don't clock the systems to the brink of extinction any longer, but that is pretty impressive, and down to the fact that I use good quality motherboards, mostly SuperMicro (ok, not really for enthusiasts) and PSU's.

Anyway, I'm venturing off-topic here, soz OP.
 
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RockoW said:
It also feels like newegg are slightly biased when it comes to the question "Do I need a new PSU?". ;)
Click to expand...
My guess is they are just covering their own asses by applying a "shitty PSU correction factor"
 
plugwash said:
My guess is they are just covering their own asses by applying a "shitty PSU correction factor"
Click to expand...

This. Manufacturers have to overestimate in order to compensate for people buying low quality PSUs.
 
I think the quality of the PSU comes before advertised wattage. Seasonic or Corsair all the way for me.
 
MrBean_Oz said:
Hello, even though you have received excellent suggestions from fellow Forumites above, may I just say that simply buy the best PSU you can afford.

Sadly, this is one area where to many builders takes shortcuts on, and in my opinion, this forms the backbone of any system.

I would really go for a good quality (and the highest wattage that you can afford), something like the Seasonic Gold or Platinum series, and always remember to look for PSU's that are rated at their specific output at 50 deg C, vs the more common 25 deg C rating.

Enjoy, and keep us posted :)
Click to expand...

Agreed!
 
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