Sign in with
Sign up | Sign in
Your question

Certified PSU or not certified ... dilemma?!

Last response: in Components
Share
September 29, 2009 8:43:16 PM

Huh... where to start... ok configuration:

MB: Gigabyte GA-MA790X-UD4
CPU: AMD AthlonII x2 245 2.9GHz SckAM3
GPU: GIGABYTE GV-R477D5-512H-B
DDR2: Kingston 4GB (2x2GB Dual Channel) 800MHz
HDD: WD 320GB Sata2 16MB cache
CASE: Frontier HA11A-BK ATX 450W

As u can see... it's 450W PSU... I sent this configuration to several firms in my town, and i got some replys ... but 1 shocked me!

The guy in the firm replyed me that I MUST use a certified PSU coz the grafics card takes too much power... i replyed something like this:

GPU: 185W http://www.xsreviews.co.uk/reviews/graphics-cards/sapph... or 156W http://mark.zoomcities.com/images/gfx/GFXpowerchartbybr...

CPU: 117W http://en.inpai.com.cn/doc/enshowcont.asp?id=6438&pagei...

HDD: <7W http://www.westerndigital.com/en/products/products.asp?...

RAM: ~4W http://www.valueram.com/datasheets/KHX6400D2K2_4G.pdf

non optical devices ... + little consumption from mouse, keyboard, sound, usb ... all under 350W

result from http://www.extreme.outervision.com/psucalculatorlite.js... :


System Type: 1 physical CPU
Motherboard: Regular - Desktop
CPU: Athlon II X2 245 2900 MHz Regor
CPU Utilization (TDP): 90% TDP

RAM: 2 Sticks DDR2 SDRAM
Video Card: ATI Radeon HD 4770
Video Type: Crossfire

Regular SATA: 1 HDD
PCI-e x16 Card: 1 Card

USB: 1 Device

Keyboard and mouse: Yes

System Load: 90 %

Capacitor Aging (+ W %): 30 %
Recommended Wattage: 339 Watts

with 100% CPU and 100% system load ... 404W

I said to him that I cant afford brand name PSU... than i got the reply something like:
frontiers 450W PSU got "200W of real power" (think he overstated this bigtime), and it's normal for PC to restart on overload if the supply is weak...

Ok... i know its normal for PC to restart on overload if the supply is weak, but ... is it weak?

comments ASAP... Thx
a b ) Power supply
a c 159 à CPUs
September 29, 2009 9:03:44 PM

The cheaper power supply brands overstate their ability to run at full load. Some will die in just a few days. You can find an antec or ocz with rebate in the $40-50 range, even corsair 400w is sometimes this price.
a c 243 ) Power supply
a b à CPUs
September 29, 2009 9:08:21 PM

babac said:

CASE: Frontier HA11A-BK ATX 450:
GPU: 185W http://www.xsreviews.co.uk/reviews/graphics-cards/sapph... or 156W http://mark.zoomcities.com/images/gfx/GFXpowerchartbybr...

I said to him that I cant afford brand name PSU... than i got the reply something like:
frontiers 450W PSU got "200W of real power" (think he overstated this bigtime)

The 185 watt number in your first link is total system power.
The 156 watt number in the second link is the combined power for 2 cards in Crossfire configuration.

If the tech said the psu has 200 watts of real power, I don't believe he was overstating aything, it's common for that type of psu to have a low output 12v rail.
Related resources
a b à CPUs
September 30, 2009 12:09:51 AM

certified PSU all the way. a must.
a b ) Power supply
a b à CPUs
September 30, 2009 9:22:13 AM

+1 to jimishtar

OP, repeat after me/us: Never, ever, ever, ever, EVER be a cheapskate on your PSU.

If you can't afford a branded, certified PSU then you MUST drop something else in your budget to afford it. The PSU is the most important part of any build on which everything else depends - it's all well and good loading up with great, powerful hardware but if the PSU cannot handle the draw (not just delivering sufficient power but also sustaining that load for long periods of time) then it WILL fail, and in many cases can take other components with it.

It will simply cost you much more money in the long run.
September 30, 2009 1:07:46 PM

Even if wattage seemed enough, amperage is where to look. If you don't have enough amps, your PSU will fry and maybe take a few parts with it.
September 30, 2009 1:52:43 PM

changing to AXP630W
GPU from 4770 to 4670
RAM from 4 to 2 GB
!