Overclock.net › Forums › Components › Power Supplies › PSU not good enough?
New Posts  All Forums:Forum Nav:

PSU not good enough?

post #1 of 11
Thread Starter 
Hey! I would like to ask you a question about my PSU. So I am going to buy Radeon HD 7770 video card. But my PSU is kinda weak. It has 350 watts power. As shown in this site it says my PC with this video card will use 295 watts. My friend said that the reserve should be at least 100 watts. Is he right and what are the risks if I install my new video card with this PSU? Also, are there risks at all if the PC uses exact amount of watts that PSU has?
post #2 of 11
It's best if you tell us which model the PSU is. Alternatively, you can take a picture of the label on the PSU and we can look at it.
With a good PSU, you don't need 100 W headroom. They're fine with running at 100% actually. With a bad PSU, however, you risk killing it and your other hardware if it's rated too highly or simply too old. Many companies rate their PSUs higher than what they are actually built for to sell them at a higher price.

If it's an old PSU it might have a lot of power on the +3.3V and +5V rails, but today we need power on the +12 V rail so I wouldn't count on it working unless you can tell us which model.
Edited by B!0HaZard - 7/31/13 at 4:10am
M1XN
(18 items)
 
Study Zenbook
(5 items)
 
 
CPUMotherboardGraphicsRAM
i7 4770K @ 4.2 GHz ASUS Maximus VI Impact MSI GTX 970 Gaming 4G 2x8 GB Kingston HyperX DDR3 @ 2400 MHz 
Hard DriveHard DriveHard DriveOptical Drive
Crucial M4 64 GB Crucial M4 128 GB SAMSUNG Spinpoint M9T 2 TB LiteOn DL-8ATSH 
CoolingOSMonitorKeyboard
Noctua NH-C14 Windows 10 64-bit ViewSonic VP2770 Vortex Pok3r 
PowerCaseMouseMouse Pad
Corsair SF600 NCASE M1 V2.5 Logitech G502 SteelSeries QcK+ 
AudioOther
HiFiMan HE-400 Logitech C920 
CPUGraphicsRAMHard Drive
i5-3317 GT 620M 2 GB soldered + 8 GB Corsair OCZ Vertex 3 120 
OS
Windows 7 Home Premium 64-bit 
  hide details  
Reply
M1XN
(18 items)
 
Study Zenbook
(5 items)
 
 
CPUMotherboardGraphicsRAM
i7 4770K @ 4.2 GHz ASUS Maximus VI Impact MSI GTX 970 Gaming 4G 2x8 GB Kingston HyperX DDR3 @ 2400 MHz 
Hard DriveHard DriveHard DriveOptical Drive
Crucial M4 64 GB Crucial M4 128 GB SAMSUNG Spinpoint M9T 2 TB LiteOn DL-8ATSH 
CoolingOSMonitorKeyboard
Noctua NH-C14 Windows 10 64-bit ViewSonic VP2770 Vortex Pok3r 
PowerCaseMouseMouse Pad
Corsair SF600 NCASE M1 V2.5 Logitech G502 SteelSeries QcK+ 
AudioOther
HiFiMan HE-400 Logitech C920 
CPUGraphicsRAMHard Drive
i5-3317 GT 620M 2 GB soldered + 8 GB Corsair OCZ Vertex 3 120 
OS
Windows 7 Home Premium 64-bit 
  hide details  
Reply
post #3 of 11
275?


Not sure where that number comes from...

I'd get a PSU, what CPU do you have? I'd go for a good quality 600w PSU, that way you'll have headroom to expand. You do not want to run a PSU at absolute max watts all the time under load...

Don't skimp on your PSU. Its the powerhouse of your computer. If you skimp, be prepared for all your components to fry one day from a PSU failure.
post #4 of 11
Thread Starter 
Cakewalk, that number comes with all the components together. I counted in CPU, RAM, motherboard - all my PC.
B10hazard, I wonder if you can see what you wanted. I took this about 5 days ago. But I am pretty sure this PSU isn't a good one. I bought this PC very cheap and actually all its components (dunno about motherboard) are quite bad.
post #5 of 11
Color me purple if it isn't this PSU. I don't know this PSU, but it is indeed an old design with the majority of the power on the +3.3 V and +5 V rails. In reality, it's only rated for 200 W on the +12 V, so in terms of modern equipment, it is essentially only a 200 W PSU. I can't say if that would work with an HD 7770.
M1XN
(18 items)
 
Study Zenbook
(5 items)
 
 
CPUMotherboardGraphicsRAM
i7 4770K @ 4.2 GHz ASUS Maximus VI Impact MSI GTX 970 Gaming 4G 2x8 GB Kingston HyperX DDR3 @ 2400 MHz 
Hard DriveHard DriveHard DriveOptical Drive
Crucial M4 64 GB Crucial M4 128 GB SAMSUNG Spinpoint M9T 2 TB LiteOn DL-8ATSH 
CoolingOSMonitorKeyboard
Noctua NH-C14 Windows 10 64-bit ViewSonic VP2770 Vortex Pok3r 
PowerCaseMouseMouse Pad
Corsair SF600 NCASE M1 V2.5 Logitech G502 SteelSeries QcK+ 
AudioOther
HiFiMan HE-400 Logitech C920 
CPUGraphicsRAMHard Drive
i5-3317 GT 620M 2 GB soldered + 8 GB Corsair OCZ Vertex 3 120 
OS
Windows 7 Home Premium 64-bit 
  hide details  
Reply
M1XN
(18 items)
 
Study Zenbook
(5 items)
 
 
CPUMotherboardGraphicsRAM
i7 4770K @ 4.2 GHz ASUS Maximus VI Impact MSI GTX 970 Gaming 4G 2x8 GB Kingston HyperX DDR3 @ 2400 MHz 
Hard DriveHard DriveHard DriveOptical Drive
Crucial M4 64 GB Crucial M4 128 GB SAMSUNG Spinpoint M9T 2 TB LiteOn DL-8ATSH 
CoolingOSMonitorKeyboard
Noctua NH-C14 Windows 10 64-bit ViewSonic VP2770 Vortex Pok3r 
PowerCaseMouseMouse Pad
Corsair SF600 NCASE M1 V2.5 Logitech G502 SteelSeries QcK+ 
AudioOther
HiFiMan HE-400 Logitech C920 
CPUGraphicsRAMHard Drive
i5-3317 GT 620M 2 GB soldered + 8 GB Corsair OCZ Vertex 3 120 
OS
Windows 7 Home Premium 64-bit 
  hide details  
Reply
post #6 of 11
Kill it with FIRE!

No seriously that PSU is crap sory to say but it is

You sould replace it
Seravee
(27 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
Optical DriveCoolingCoolingOS
LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
AudioAudioAudioAudio
Onkyo TX NR646  Harman Kardon HKTS 60 Dali Opticon Vokal x2 Dali Opticon 2 
AudioOtherOther
x2 Dali Opticon 1 CableMod E series PSU cable set CableMod LED Strips 
  hide details  
Reply
Seravee
(27 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
Optical DriveCoolingCoolingOS
LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
AudioAudioAudioAudio
Onkyo TX NR646  Harman Kardon HKTS 60 Dali Opticon Vokal x2 Dali Opticon 2 
AudioOtherOther
x2 Dali Opticon 1 CableMod E series PSU cable set CableMod LED Strips 
  hide details  
Reply
post #7 of 11
that PSU will not serve you well, once it heats up it will struggle even more. Very cheap PSU's are used far too much and while lucky people will have one that runs for years, you will find for the most part that these things have a few side effects along with the inevitable failure when loaded out.

Instability will be a big concern, if the system didn't have a separate GPU you may have got away with it, but the ticking timebomb would remain as Shilka said, you need to replace it with something better.
    
CPUMotherboardGraphicsRAM
5820k MSI X99S SLI PLUS MSI GTX 1080 Ti Seahawk EK X 16GB GSKILL 2400 Ripjaw 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 EVO 750 Seagate 1TB Seagate 1TB 240GB Mushkin Chronos 
CoolingOSMonitorKeyboard
Custome water loop, EK Supremecy MX CPU Block,... Windows 10 Pro 64Bit AOC 4k U2879VF Speedlink Ultor red switched tkl keyboard 
PowerCaseMouseMouse Pad
Seasonic Snow Silent 750 Platinum Cooltek W2 upgraded to tempered glass window pa... Steelseries Rival 310 ASUS Anniversary Mousepad 
Audio
Fnatic Duel Headset 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
5820k MSI X99S SLI PLUS MSI GTX 1080 Ti Seahawk EK X 16GB GSKILL 2400 Ripjaw 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 EVO 750 Seagate 1TB Seagate 1TB 240GB Mushkin Chronos 
CoolingOSMonitorKeyboard
Custome water loop, EK Supremecy MX CPU Block,... Windows 10 Pro 64Bit AOC 4k U2879VF Speedlink Ultor red switched tkl keyboard 
PowerCaseMouseMouse Pad
Seasonic Snow Silent 750 Platinum Cooltek W2 upgraded to tempered glass window pa... Steelseries Rival 310 ASUS Anniversary Mousepad 
Audio
Fnatic Duel Headset 
  hide details  
Reply
post #8 of 11
Codegen is one of the worst power supplies in the world. It's so legendar that people in my country even wrote a lot pf poems about Codegen power supplies biggrin.gif .And as above KILL IT WITH FIRE.
GROM II [Gaming]
(34 items)
 
 
MIR[server]
(16 items)
 
CPUMotherboardGraphicsGraphics
i7 5820K@4.6Ghz@1.325V 2.05V input Asrock X99 Extreme 4 Sapphire R9 290X [Uber Mode] Nvidia Geforce GT240 GDDR5 512MB [PhysX + analo... 
RAMRAMRAMHard Drive
Crucial Ballistix 2400mhz 4GB 1.3V Crucial 2133@2400mhz 4GB 1.3V Crucial 2133@2400mhz 4GB 1.3V Seagate 4TB 
Hard DriveHard DriveHard DriveCooling
Samsung 840 EVO 120GB[OS] WD Red 1TB Samsung 840EVO 120GB[Arma 3] Koolance 380A [modded for LGA2011v3] 
CoolingCoolingCoolingCooling
Black Water Ultimate 123 [3x Corsair AF120 Perf... MCP655 with Alphacool HF acetal top [5th gear] Feser 10/13 UV Tubing Alphacool CKC clear 
CoolingCoolingCoolingOS
Cooltek 120mm rad [antec tri-speed] Cooltek 120mm Rad [Corsair SP120 High Performan... Alphacool GPX-A 290 [290X waterblock] Windows 7 Ulitimate 64 bit  
MonitorMonitorMonitorMonitor
LG 29EA93 [2560x1080] LG L1715S [1280x1024] Samsung SMB2030N [1600x900] DIY display on V59 controller[1366x768@1440x900] 
KeyboardPowerCaseMouse
4Tech X7 G800 Cooler Master Real Power 850w Cooler Master Haf 932 Amd Edition Microsoft Mobile Mouse 4000 
AudioAudioAudioOther
Superlux hd681 FiiO E07K SoundMax Superbeam [bundled with P5B DLX] Scythe Kaze Master Pro 6 chanell 
OtherOther
2x Sharkoon 30cm red cold cathodes 2x Revoltec 10cm UV cold cathodes 
CPUMotherboardGraphicsRAM
Athlon II X2 250 @2GHZ @1core Gigabyte 870A-USB3 Ati X600 128MB GoodRam 4gb 1333mhz 
Hard DriveHard DriveHard DriveHard Drive
Hitachi Ultrastar 1TB Samsung 40gb[OS] 6x Hitachi 2TB (RAID 6) 2x160GB RAID 1 
OSPowerOtherOther
Debian 8.2.0 x64 Pentagram Silent Force 460W Ever Eco Pro 700 CDS [UPS] Edimax EW-7318USg [Access Point] 
CPUCPUMotherboardGraphics
Xeon E5420 Xeon E5420 HP ML350 G5 motherboard HD5450 with HD5770 cooler on passive [PCIE X4] 
RAMHard DriveHard DriveHard Drive
20GB FB-DIMM@800mhz 2x40GB WD RAID0 Sata [11year old as for 2015] 2x73GB HP 15K RPM RAID0 SAS HP 10K RPM 143GB SAS 
Hard DriveHard DriveMonitorPower
HP 10K RPM 143GB SAS HP 10K RPM 143GB SAS Fujitsu W19-1 [1440x900] Delta DPS 800W 
CaseOtherOtherOther
HP ML350 G5 case Adaptec SATA II RAID 1220SA ADAPTEC SCSI-CARD 29320LP Quantum TC-L32BX LTO 3 [tape drive] 
  hide details  
Reply
GROM II [Gaming]
(34 items)
 
 
MIR[server]
(16 items)
 
CPUMotherboardGraphicsGraphics
i7 5820K@4.6Ghz@1.325V 2.05V input Asrock X99 Extreme 4 Sapphire R9 290X [Uber Mode] Nvidia Geforce GT240 GDDR5 512MB [PhysX + analo... 
RAMRAMRAMHard Drive
Crucial Ballistix 2400mhz 4GB 1.3V Crucial 2133@2400mhz 4GB 1.3V Crucial 2133@2400mhz 4GB 1.3V Seagate 4TB 
Hard DriveHard DriveHard DriveCooling
Samsung 840 EVO 120GB[OS] WD Red 1TB Samsung 840EVO 120GB[Arma 3] Koolance 380A [modded for LGA2011v3] 
CoolingCoolingCoolingCooling
Black Water Ultimate 123 [3x Corsair AF120 Perf... MCP655 with Alphacool HF acetal top [5th gear] Feser 10/13 UV Tubing Alphacool CKC clear 
CoolingCoolingCoolingOS
Cooltek 120mm rad [antec tri-speed] Cooltek 120mm Rad [Corsair SP120 High Performan... Alphacool GPX-A 290 [290X waterblock] Windows 7 Ulitimate 64 bit  
MonitorMonitorMonitorMonitor
LG 29EA93 [2560x1080] LG L1715S [1280x1024] Samsung SMB2030N [1600x900] DIY display on V59 controller[1366x768@1440x900] 
KeyboardPowerCaseMouse
4Tech X7 G800 Cooler Master Real Power 850w Cooler Master Haf 932 Amd Edition Microsoft Mobile Mouse 4000 
AudioAudioAudioOther
Superlux hd681 FiiO E07K SoundMax Superbeam [bundled with P5B DLX] Scythe Kaze Master Pro 6 chanell 
OtherOther
2x Sharkoon 30cm red cold cathodes 2x Revoltec 10cm UV cold cathodes 
CPUMotherboardGraphicsRAM
Athlon II X2 250 @2GHZ @1core Gigabyte 870A-USB3 Ati X600 128MB GoodRam 4gb 1333mhz 
Hard DriveHard DriveHard DriveHard Drive
Hitachi Ultrastar 1TB Samsung 40gb[OS] 6x Hitachi 2TB (RAID 6) 2x160GB RAID 1 
OSPowerOtherOther
Debian 8.2.0 x64 Pentagram Silent Force 460W Ever Eco Pro 700 CDS [UPS] Edimax EW-7318USg [Access Point] 
CPUCPUMotherboardGraphics
Xeon E5420 Xeon E5420 HP ML350 G5 motherboard HD5450 with HD5770 cooler on passive [PCIE X4] 
RAMHard DriveHard DriveHard Drive
20GB FB-DIMM@800mhz 2x40GB WD RAID0 Sata [11year old as for 2015] 2x73GB HP 15K RPM RAID0 SAS HP 10K RPM 143GB SAS 
Hard DriveHard DriveMonitorPower
HP 10K RPM 143GB SAS HP 10K RPM 143GB SAS Fujitsu W19-1 [1440x900] Delta DPS 800W 
CaseOtherOtherOther
HP ML350 G5 case Adaptec SATA II RAID 1220SA ADAPTEC SCSI-CARD 29320LP Quantum TC-L32BX LTO 3 [tape drive] 
  hide details  
Reply
post #9 of 11
The scary thing is such cheap power supplies are so prevalent, usually supplied free with a case, PC builders use them and the must know what they are up to, thats like putting substandard wiring or tyres on a car........oh wait..........

but seriously they should be banned how on earth do they get CE certification?
    
CPUMotherboardGraphicsRAM
5820k MSI X99S SLI PLUS MSI GTX 1080 Ti Seahawk EK X 16GB GSKILL 2400 Ripjaw 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 EVO 750 Seagate 1TB Seagate 1TB 240GB Mushkin Chronos 
CoolingOSMonitorKeyboard
Custome water loop, EK Supremecy MX CPU Block,... Windows 10 Pro 64Bit AOC 4k U2879VF Speedlink Ultor red switched tkl keyboard 
PowerCaseMouseMouse Pad
Seasonic Snow Silent 750 Platinum Cooltek W2 upgraded to tempered glass window pa... Steelseries Rival 310 ASUS Anniversary Mousepad 
Audio
Fnatic Duel Headset 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
5820k MSI X99S SLI PLUS MSI GTX 1080 Ti Seahawk EK X 16GB GSKILL 2400 Ripjaw 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 EVO 750 Seagate 1TB Seagate 1TB 240GB Mushkin Chronos 
CoolingOSMonitorKeyboard
Custome water loop, EK Supremecy MX CPU Block,... Windows 10 Pro 64Bit AOC 4k U2879VF Speedlink Ultor red switched tkl keyboard 
PowerCaseMouseMouse Pad
Seasonic Snow Silent 750 Platinum Cooltek W2 upgraded to tempered glass window pa... Steelseries Rival 310 ASUS Anniversary Mousepad 
Audio
Fnatic Duel Headset 
  hide details  
Reply
post #10 of 11
Thread Starter 
Okay, thanks you all smile.gif I got the info what I needed and I know what to do now - buy a new PSU biggrin.gif
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Power Supplies
Overclock.net › Forums › Components › Power Supplies › PSU not good enough?