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New psu help

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February 26, 2013 5:56:10 PM

im looking for a new psu but dont know what wattage to get

fx8120
antec kuhler 920
16gb ram
2 hdd
5 case fans
7970 vapour x
on the box of my 7970 its says minimum 750w can anyone give me some suggestions max willing to spend £150
thanks

More about : psu

February 26, 2013 7:25:34 PM

anyone???
a b ) Power supply
February 26, 2013 7:33:44 PM

That 750w is for Crossfire. A single one requires at least a 500w. I would go with at least a 750w anyway, just to give yourself some headroom should you decide to buy another 7970. Corsair or Seasonic with a rating of 80+ bronze or better.
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February 26, 2013 7:38:14 PM

well i have a 700w psu at the moment and i just get a black screen after 10min the box says 750w (or greater) power supply with two 8pin pci express if it was for crossfire wouldnt it say 4??
a c 291 ) Power supply
February 26, 2013 8:17:35 PM

skiberdee said:
well i have a 700w psu at the moment and i just get a black screen after 10min the box says 750w (or greater) power supply with two 8pin pci express if it was for crossfire wouldnt it say 4??


Hi - what brand/model is your 700w PSU? Unfortunately, there are
a lot of PSU's out there that exaggerate/lie about their publ specs.

Yes, two pci-e connectors are req for one 7970, a ref 7970 req 1- 6pin & 1 - 8pin,
your vapor-x req 2 - 8pin.

A single 7970 sys should run finr on a quality 550w unit(with headroom),
the vapor-x does draw more power, but a quality 550w w/min 31a on the
+12v rail(s) should still be more than enough.

Need make/model of your current PSU, I suspect that may be the root
of your issue.
February 26, 2013 8:19:28 PM

toyftw said:
Hi - what brand/model is your 700w PSU? Unfortunately, there are
a lot of PSU's out there that exaggerate/lie about their publ specs.

Yes, two pci-e connectors are req for one 7970, a ref 7970 req 1- 6pin & 1 - 8pin,
your vapor-x req 2 - 8pin.

A single 7970 sys should run finr on a quality 550w unit(with headroom),
the vapor-x does draw more power, but a quality 550w w/min 31a on the
+12v rail(s) should still be more than enough.

Need make/model of your current PSU, I suspect that may be the root
of your issue.


i have a ocz modxtreme pro
a b ) Power supply
February 26, 2013 8:21:59 PM

so it looks like you need 350-400 watts just for your graphics card.
watts= amps*volts
400 = x* 12 volt rail
34 amps
you need a power supply that produces a 12v rail at 30 amps
if you look at your specs it will say what amps it pushes on each rail.
make sure you check the product specs on any recommendation given
I am not sure of euro pricing but corsair or seasonic are best choices
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

this one has a promo code also

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
if you can use newegg
February 26, 2013 8:25:23 PM

fkr said:
so it looks like you need 350-400 watts just for your graphics card.
watts= amps*volts
400 = x* 12 volt rail
34 amps
you need a power supply that produces a 12v rail at 30 amps
if you look at your specs it will say what amps it pushes on each rail.
make sure you check the product specs on any recommendation given
I am not sure of euro pricing but corsair or seasonic are best choices
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

this one has a promo code also

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
if you can use newegg


ahhh i think my problem is that my psu produces 25amps thanks for the help
a c 291 ) Power supply
February 26, 2013 8:35:42 PM

skiberdee said:
ahhh i think my problem is that my psu produces 25amps thanks for the help



Hi - OCZ modxtreme pro 700w outputs 46a on the +12v rail(s), you
have 2 - +12v rails (25a each), 46a combined.

You might have a bad psu, but the brand/specs are fine.
February 26, 2013 8:39:47 PM

toyftw said:
Hi - OCZ modxtreme pro 700w outputs 46a on the +12v rail(s), you
have 2 - +12v rails (25a each), 46a combined.

You might have a bad psu, but the brand/specs are fine.


it works fine with my gtx 580sc what power supply would you recomend for the vapor x?
a b ) Power supply
February 26, 2013 8:40:10 PM

there are some horror stories out there of burning out the power supply and then it taking other components out with it, so I am happy you noticed before any harm was done. I just learned this yesterday after PM one of the top contributors in the power supply forum and he coached me a little and then I did a bunch of reading. never realized how secondary overall wattage was as compared to the ability to carry a current continuously. live and learn
February 26, 2013 8:46:23 PM

fkr said:
there are some horror stories out there of burning out the power supply and then it taking other components out with it, so I am happy you noticed before any harm was done. I just learned this yesterday after PM one of the top contributors in the power supply forum and he coached me a little and then I did a bunch of reading. never realized how secondary overall wattage was as compared to the ability to carry a current continuously. live and learn


i think im going to go for the hx850 do you think that would be ok?
a c 291 ) Power supply
February 26, 2013 8:55:42 PM

skiberdee said:
it works fine with my gtx 580sc what power supply would you recomend for the vapor x?


How long have you had it? If it's still in warranty rma it.
It did fail Hardocp's review. stopped working twice during load tests

It's rated power is more than sufficient. I think you have one
that isn't delivering it's specs.

Look for quality brands such as Seasonic, Antec, XFX, most Corsair's,
Rosewill Capstone series, PC Power & Cooling, most Enermax, most Silverstone.

Where are you located? UK?
a b ) Power supply
February 26, 2013 8:59:05 PM

skiberdee said:
well i have a 700w psu at the moment and i just get a black screen after 10min the box says 750w (or greater) power supply with two 8pin pci express if it was for crossfire wouldnt it say 4??


I got the 500w or greater from this.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...





skiberdee said:
i think im going to go for the hx850 do you think that would be ok?


That would be more than enough for your setup. I run 2x 5850's on a TX 750. I highly doubt any single GPU graphics card is going to pull more wattage than my two cards combined.
February 26, 2013 8:59:18 PM

toyftw said:
How long have you had it? If it's still in warranty rma it.
It did fail Hardocp's review.

It's rated power is more than sufficient. I think you have one
that isn't delivering it's specs.

Look for quality brands such as Seasonic, Antec, XFX, most Corsair's,
Rosewill Capstone series, PC Power & Cooling, most Enermax, most Silverstone.

Where are you located?


im located in england i was looking at the 850W XFX Pro Black Edition and the 1000w akasa venom.

psu is about 8-10 months old
a b ) Power supply
February 26, 2013 9:00:49 PM

corsair. 7 year warranty. good power. gold efficiency. That should be good :) 

not to mention a new egg 5 egg rating 83% of the time is really impressive
February 26, 2013 9:01:19 PM

fkr said:
corsair. 7 year warranty. good power. gold efficiency. That should be good :) 


ok thanks for your help
a c 291 ) Power supply
February 26, 2013 9:05:03 PM

skiberdee said:
im located in england i was looking at the 850W XFX Pro Black Edition and the 1000w akasa venom.

psu is about 8-10 months old


Hi - XFX pro is a good choice, Seasonic built.
Plz understand tho, you don't need anywhere near 850w psu.

It wasn't that 700w isn't enough, it was that the PSU itself
appears bad.

No harm in 850w, but the unnecessary high initial cost.

A quality 650w unit would still provide more amps/watts than
you require.

You should be able to rma the unit, but they will most likely send
you another of the same or repair(unlikely as it's made by sirtec) the one you send
February 26, 2013 9:09:29 PM

toyftw said:
Hi - XFX pro is a good choice, Seasonic built.
Plz understand tho, you don't need anywhere near 850w psu.

It wasn't that 700w isn't enough, it was that the PSU itself
appears bad.

No harm in 850w, but the unnecessary high initial cost.

A quality 650w unit would still provide more amps/watts than
you require.


ok il look at some 650w psu's thanks for you help
a c 291 ) Power supply
February 26, 2013 9:11:01 PM

skiberdee said:
im located in england i was looking at the 850W XFX Pro Black Edition and the 1000w akasa venom.

psu is about 8-10 months old


Hi again - stay away from akasa venom - made by Andyson, not a respected oem.
February 26, 2013 9:13:07 PM

toyftw said:
Hi again - stay away from akasa venom - made by Andyson, not a respected oem.


oh ok thanks for letting me know
a c 291 ) Power supply
February 26, 2013 9:13:49 PM

skiberdee said:
ok il look at some 650w psu's thanks for you help


Hi - I usually use Novatech or scan when searching UK. If you have a
favorite, use it, just sick to quality brands, you can ask here on
specific brand/model if you are not sure.
February 26, 2013 9:14:28 PM

toyftw said:
Hi again - stay away from akasa venom - made by Andyson, not a respected oem.


oh ok thanks for letting me know
February 26, 2013 9:16:08 PM

toyftw said:
Hi - I usually use Novatech or scan when searching UK. If you have a
favorite, use it, just sick to quality brands, you can ask here on
specific brand/model if you are not sure.


mainly use amazon as i get free next day delivery will ask tho if i get stuck
a b ) Power supply
February 26, 2013 9:16:51 PM

they are good power supplies and they are made by seasonic. only difference maybe is the 5 yr warranty and customer service. you never know when you may get a DOA.
February 26, 2013 9:19:55 PM

fkr said:
they are good power supplies and they are made by seasonic. only difference maybe is the 5 yr warranty and customer service. you never know when you may get a DOA.


are the corsair ax series worth the extra money?
a b ) Power supply
February 26, 2013 9:24:18 PM

some are seasonic and others are not. some rate well and others not so well. be patient with the power supply selection it is one of the most important. I learned the hard way
February 26, 2013 9:27:24 PM

fkr said:
some are seasonic and others are not. some rate well and others not so well. be patient with the power supply selection it is one of the most important. I learned the hard way


well im going to order one tomorrow already had the vapor x sat next to me for a month cant wait much longer
a c 291 ) Power supply
February 26, 2013 9:27:25 PM

skiberdee said:
are the corsair ax series worth the extra money?


Well, they are certainly excellent PSU's (Seasonic built), so you get
better interior psu parts, more rigid QC, longer warranty, conservatively rated
specs, usually very quiet, depending on which model you are considering,
it'll be either gold or platinum efficiency rated.

February 26, 2013 9:29:45 PM

toyftw said:
Well, they are certainly excellent PSU's (Seasonic built), so you get
better interior psu parts, more rigid QC, longer warranty, conservatively rated
specs, usually very quiet, depending on which model you are considering,
it'll be either gold or platinum efficiency rated.


was looking at the corsair ax 760 (the ax is red)
a b ) Power supply
February 26, 2013 9:41:52 PM

I would do the corsair. it is quiet. efficient. modular. 7 year warranty. Gold Award from HardOCP.com
better customer service.

xfx seems to have bad customer service and only a 5 yr warranty
February 26, 2013 9:42:52 PM

fkr said:
I would do the corsair. it is quiet. efficient. modular. 7 year warranty. Gold Award from HardOCP.com
better customer service.

also cheaper thanks for your help i think il order it later
a c 291 ) Power supply
February 26, 2013 9:45:07 PM

skiberdee said:
Decided to go for one of these two

corsair hx850 http://www.amazon.co.uk/Corsair-HX850-Professional-Seri...

or the

xfx pro black edition modular 850 http://www.scan.co.uk/products/850w-xfx-pro-black-editi...

what do you suggest


Both ex units - go with the Corsair & save the £9.

If having Seasonic as the OEM is more comforting
than CWT, then go for the XFX. BUt, that CWT built
hx is fine and I personally wouldn't be reticent.
February 26, 2013 9:48:11 PM

toyftw said:
Both ex units - go with the Corsair & save the £9.

If having Seasonic as the OEM is more comforting
than CWT, then go for the XFX. BUt, that CWT built
hx is fine and I personally wouldn't be reticent.

ok thanks for your help corsair it is
!