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Is my PSU strong enough?

post #1 of 12
Thread Starter 
Currently, with my computer completely at stock specs, my PSU's 12v rail will dip down to 11.8 during gaming. Judging by other posts, I dont think that is too low. Is it? My main concern is that I plan on getting some power hungry upgrades. Such as a x850xtpe, zalman cpu cooler, a couple strong fans. Will this power supply be enough? Ignore my power supply specs in my user cp because I just made that wattage up. lol. I'm not sure what wattage my psu is putting out. It says "PEAK OUTPUT: 420W", it also says 220W under the other specs. So.....I guess I have a 420W PSU? If my current psu isnt enough for my upgrades, I was looking at this psu.

http://www.newegg.com/Product/Produc...82E16817182017

What do you guys think?
post #2 of 12
Well, if you are going to get a new PSU, rather than getting the one in the link provided, I recommend spending an additional twenty dollars on the tried and trusted, the Sunbeam NUUO.

I fear that the Rosewill PSU provided in the link may output unstable voltage. I have heard many fans of the NUUO enthusiastically explain how great it is. On the flip side, I have heard many question the stability of the Rosewill series.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4400 P35 DS3R 8800GTS 2GB Crucial Ballistix 
Hard DriveOptical DriveOSMonitor
1x SATA 80GB, 160GB Hitachi - 1x 120GB Samsung IDE DVDRW Fedora 7 and Windows XP ViewSonic VX922 2ms 19in 
KeyboardPowerCaseMouse
basic 520W Corsair Thermaltake VB1000WWS Logitech G5 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4400 P35 DS3R 8800GTS 2GB Crucial Ballistix 
Hard DriveOptical DriveOSMonitor
1x SATA 80GB, 160GB Hitachi - 1x 120GB Samsung IDE DVDRW Fedora 7 and Windows XP ViewSonic VX922 2ms 19in 
KeyboardPowerCaseMouse
basic 520W Corsair Thermaltake VB1000WWS Logitech G5 
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post #3 of 12
Thread Starter 
Thanks for the info. I will consider that. I really wanted one with blue leds though....lol. Do u think my current psu will be enough for my upgrades?
post #4 of 12
Much of the PSU is not sheer wattage, but how many amps are available on each rail, and how stable each rail is. The Sunbeam NUUO for example, has two 12V rails, each with 20A.

Adding a highish-end graphics card will make or break your PSU, it can cause serious problems. If you are going to upgrade the PSU, you might as well do it right. There are high-end PSU's that have LED lights, if that is what you want.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4400 P35 DS3R 8800GTS 2GB Crucial Ballistix 
Hard DriveOptical DriveOSMonitor
1x SATA 80GB, 160GB Hitachi - 1x 120GB Samsung IDE DVDRW Fedora 7 and Windows XP ViewSonic VX922 2ms 19in 
KeyboardPowerCaseMouse
basic 520W Corsair Thermaltake VB1000WWS Logitech G5 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E4400 P35 DS3R 8800GTS 2GB Crucial Ballistix 
Hard DriveOptical DriveOSMonitor
1x SATA 80GB, 160GB Hitachi - 1x 120GB Samsung IDE DVDRW Fedora 7 and Windows XP ViewSonic VX922 2ms 19in 
KeyboardPowerCaseMouse
basic 520W Corsair Thermaltake VB1000WWS Logitech G5 
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post #5 of 12
Or you could just buy a blue led fan and install it into the psu...
    
CPUMotherboardGraphicsRAM
FX8320 Asus M5A78L-M/USB3 XFX AMD Radeon HD 7950 Graphics Card 3GB Corsair CMX8GX3M2A1333C9 XMS3 16GB (4x4GB) 
Hard DriveHard DriveCoolingOS
Samsung F3 1TB Hard Drive Crucial CT128M4SSD2 128GB SSD Coolermaster Hyper 212 EVO Windows 7 Professional  
MonitorMonitorPowerCase
Samsung SyncMaster BX2431 1080p PCBank PB2700 1440p IPS Be Quiet! Dark Power Pro 550W PSU  Xigmatek Giggas 
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CPUMotherboardGraphicsRAM
FX8320 Asus M5A78L-M/USB3 XFX AMD Radeon HD 7950 Graphics Card 3GB Corsair CMX8GX3M2A1333C9 XMS3 16GB (4x4GB) 
Hard DriveHard DriveCoolingOS
Samsung F3 1TB Hard Drive Crucial CT128M4SSD2 128GB SSD Coolermaster Hyper 212 EVO Windows 7 Professional  
MonitorMonitorPowerCase
Samsung SyncMaster BX2431 1080p PCBank PB2700 1440p IPS Be Quiet! Dark Power Pro 550W PSU  Xigmatek Giggas 
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post #6 of 12
Thread Starter 
lol i never thought of that. Wouldn't that require some special wiring though? And couldn't it conceivably ruin my brand new psu?
post #7 of 12
What are you measuring the voltage with? Never, ever trust software monitors for voltage.

A generic no name PSU lists the peak power (in your case 420W), a reputable PSU would list the constant power, ie. what the unit is capable of outputting all the time. My Hiper is rated at 480W constant, with a peak of 530W. I'd guess your units constant power somewhere between 200-250W.
post #8 of 12
Thats not uncommon. As long as it stays with the 6% tollerance, i wouldn't worry. I get that normally with my 500w antec he.
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CPUMotherboardOSMonitor
AMD X2 4400+ ASUS A8R32-MVP DELUXE WINDOWS XP PRO 64bit SAMSUNG 940B 19" 
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AMD X2 4400+ ASUS A8R32-MVP DELUXE WINDOWS XP PRO 64bit SAMSUNG 940B 19" 
PowerCase
ANTEC HE 500W ANTEC P180 
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post #9 of 12
Thread Starter 
Thanks muffin. I am using software to monitor voltage. (Speedfan) Judging by the label on my "no name" psu I think its constant power is 220W which sounds a little low for my upgrades. I'll probably go with the sunbeam that rippon suggested unless you guys can think of another one thats better.
post #10 of 12
all depends on the quality of the PSU.

my old P4 rig was overclocked to 2.65 and had a: WD raptor, WD 60GB, and another 120GB HD, DVD burner, CD burner, 4x512MB Ram and an overclocked ATI x800. the whole thing was running on old Antec Lanboy with the bundled PSU at 350W.

i was able to run games like SWG and BF2 without any problems.
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AMD Opteron 175 Asus A8N32-SLI eVGA 7950 GX2 Corsair 3500LL Pro 2x1024 
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WD740GD + WD2500KS XP SP2 Dell 2005FPW Logitech G15 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Opteron 175 Asus A8N32-SLI eVGA 7950 GX2 Corsair 3500LL Pro 2x1024 
Hard DriveOSMonitorKeyboard
WD740GD + WD2500KS XP SP2 Dell 2005FPW Logitech G15 
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Seasonic S12 600w Antec P-180 Logitech MX510 
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