Spec me a new psu

[robert1690]

running the following

amd a10 5800k
gigabyte fm2 mobo
16gb gskill ripjaws
3 sata hds
1 ssd
2 x 7870 tahiti gfx cards

how much power do i need and what would be the ideal size

 

[toyftw]

running the following

amd a10 5800k
gigabyte fm2 mobo
16gb gskill ripjaws
3 sata hds
1 ssd
2 x 7870 tahiti gfx cards

how much power do i need and what would be the ideal size

Hi - realhardtech suggests 600w for a sys with 2 7870's CF, and that has some
headroom built in (not all 600w PSU's are created equal) to insure
enough amps on the +12v rail(s).

However, you do need a PSU with 4 PCI-E connectors(although you can
use molex to PCI-E adapters) for 2 7870's, and PSU's with 4 PCI-E
connectors generally appear on quality PSU's of 650w & above.

So, you can run your sys with 600w(even a good quality 550w) and get the
molex to PCI-E adapters you need or purch a quality 650w unit with 4 PCI-E
connectors, which is what I would do.

Quality brands: Seasonic, XFX, PC Power & Cooling, Rosewill Capstone series,
Antec, most Corsair's, and a few others.

Tom

if you would like me to recommend a couple, plz post your budget

 

[robert1690]

I was told that I would need a minimum 750w psu like corsair or ocz. Ideally prefer one with the. 4 pcie connections on it

 

[robert1690]

Budget about 60-80 pounds in english

 

[toyftw]

I was told that I would need a minimum 750w psu like corsair or ocz. Ideally prefer one with the. 4 pcie connections on it

You were given bad information if someone told you 750w minimum,
you need 600w, but the ones with 4 connectors are going to
be 650w & above. ocz has some good psu's and a couple not too good.

 

[toyftw]

Budget about 60-80 pounds in english

Here's a good one in your budget range:

http://www.novatech.co.uk/products/components/powersupplies/p1-750s-nlb9.html

another:

http://www.scan.co.uk/products/650w-xfx-pro-series-core-edition-p1-650s-ukb9-85-eff-80-plus-bronze-sli-crossfire-eps-12v-fan-atx-v2

 

[joeh_87]

question why an APU with 2 dedicated GPUs?

 

[robert1690]

Bad choice of cpu mate. Long story haha. Does it make a difference but the 7870 is th. Vtx3d tahitis do they use more power. Don't wanna end up with a psu that can't run it. I have a 700w just now but soon as I run furmark company shuts down so takin the psu ain't good enough being a cheapo one

 

[robert1690]

On the 1st psu I noticed that it has 2 x8 pin pcie connectors do they still fit a 6 pin connection

 

[toyftw]

On the 1st psu I noticed that it has 2 x8 pin pcie connectors do they still fit a 6 pin connection

Yes - the 8 pin(commonly referred to as 6+2pin) also work on the 6 pin,
the last 2 don't get used if you don't need them

Tom

 

[robert1690]

Sound ill order the one from scan as I've used them before think it was the 650w one. And your sure that will definitely be enough to power the. 2 cards

 

[toyftw]

Sound ill order the one from scan as I've used them before think it was the 650w one. And your sure that will definitely be enough to power the. 2 cards

Yes, I'm sure the XFX 650 will power the 2 7870's, as realhardtech
states you need only 600w, you will have headroom. The XFX is
Seasonic built and a quality unit.

Tom

 

[joeh_87]

Bad choice of cpu mate. Long story haha. Does it make a difference but the 7870 is th. Vtx3d tahitis do they use more power. Don't wanna end up with a psu that can't run it. I have a 700w just now but soon as I run furmark company shuts down so takin the psu ain't good enough being a cheapo one

haha, i won't get into it I've done similar in the past


What ampage is on the 12V rail on your current 700W?

 

[robert1690]

its only 20a on each 12v rail