PSU for Core 2 Duo with a Geforce 8800 GTX advice please

[Trimble Bracegirdle]

I will be gratefull if people here can say what I need in a ATX Power
Supply ..(I am in the UK)
for a Core 2 Duo E6600 with a Geforce 8800 GTX .

I'm going near mad over this ...I've got all the bits for new computer but
after
much Goggle ing & reading spec sheets (& not wanting to pay more than
necessary)
I'm still not sure.
The one I have just brought looks on closer inspection to be maybe not up to
it..
Spec....600 watt ..
+3.3 32a
+5 35a
-5 17a
+12 16a
-12 0.8a
+5vsb 2a

Its that 16 amp on the +12 line that's got me worried .
Prices on these PSU things seem crazy in that prices are from £10 to £150
for things that seem much the same.
Mouse
@@@

 

[DaveW]

Things are NOT the same. The low priced PSU's will NOT actually supply
anywhere near 600 Watts and the needed current during actual operation. They
use drastically inferior parts in the PSU to get the cost down. For 600
REAL watts you should be spending closer to the upper end, if you want
reliability, and to avoid burning out some of your computer's components due
to an over stressed under-built PSU.

 

[Paul]

I will be gratefull if people here can say what I need in a ATX Power
Supply ..(I am in the UK)
for a Core 2 Duo E6600 with a Geforce 8800 GTX .

I'm going near mad over this ...I've got all the bits for new computer but
after
much Goggle ing & reading spec sheets (& not wanting to pay more than
necessary)
I'm still not sure.
The one I have just brought looks on closer inspection to be maybe not up to
it..
Spec....600 watt ..
+3.3 32a
+5 35a
-5 17a
+12 16a
-12 0.8a
+5vsb 2a

Its that 16 amp on the +12 line that's got me worried .
Prices on these PSU things seem crazy in that prices are from £10 to £150
for things that seem much the same.
Mouse
@@@

E6600 - 65W. (65W/12V) * (1/0.90) = 6.02 amps (assumes 90% Vcore efficiency)
http://processorfinder.intel.com/details.aspx?sSpec=SL9S8

8800GTX is 145W, as quoted on Xbitlabs from an Nvidia source. Which is
roughly 12V @ 12A or so.

A hard drive is 12V @ 0.6A. A CD 12V @ 1.5A. System fans might be 12V @ 0.5A.

Total so far is 20.6A.

You are short 4.6A so far.

In terms of total power, allocate 50W for 3.3V and 5V rails (since it
cannot be calculated and that is just a guess), and the 20.6A * 12V is
another 247.2W. So the total is roughly 300W total, with most of the load
on the 12V rails.

You want a supply with two PCI Express connectors.

Supplies come in single and dual rail configurations, and if you want
native PCI Express 2x3 power connectors, you'll be getting a dual rail supply.
The way the rails split, is 12V2 powers the processor (6 amps) and
12V1 powers the rest (14.6 amps).

The suspicion, in many cases, is the supply doesn't actually have two
separate 12V output rails, but as a consumer, you are forced to play the
game, and pay extra for the typical "asymmetric" load versus the power
supplies "symmetric" output characteristic. Therefore, if this was my
computer, I'd be shopping for something with 12V @ 18A for 12V1.

An example (Dabs doesn't list the specs for each rail, so I cannot
really do much comparison shopping - had to use Newegg to get a spec):

+3.3V@32A,+5V@32A,+12V1@22A,+12V2@22A,[email protected], +5VSB@3A ($90 USD, £62.26 inc vat)
ENERMAX EG495AX-VE FMA ATX12V Ver 2.2 485W Power Supply 100 - 240 V
http://www.newegg.com/Product/Product.asp?Item=N82E16817194015
http://www.dabs.com/productview.asp...lectedId=11259&PageMode=1&NavigationKey=11259

Paul

 

[Mike T.]

I will be gratefull if people here can say what I need in a ATX Power
Supply ..(I am in the UK)
for a Core 2 Duo E6600 with a Geforce 8800 GTX .

I'm going near mad over this ...I've got all the bits for new computer but
after
much Goggle ing & reading spec sheets (& not wanting to pay more than
necessary)
I'm still not sure.
The one I have just brought looks on closer inspection to be maybe not up
to
it..
Spec....600 watt ..
+3.3 32a
+5 35a
-5 17a
+12 16a
-12 0.8a
+5vsb 2a

Its that 16 amp on the +12 line that's got me worried .
Prices on these PSU things seem crazy in that prices are from £10 to £150
for things that seem much the same.
Mouse
@@@

Well you could try one of the following:
http://www.novatech.co.uk/novatech/specpage.html?ENE-EL500B

44A on 12V

http://www.novatech.co.uk/novatech/specpage.html?OCZ-GXS60

72A on 12V

Both will be plenty powerful. -Dave