Is this enough power?

[frost]

Will a 750w PSU be enough to run 3 9800 GTX?

[mjc]

No...

Just because it is X Watts doesn't mean it is appropriate/good.

More specifics on the 750W power supply would be helpful in determining whether or not that specific one would work...

[frost]

Type ATX12V / EPS12V

Maximum Power 750W
Fans Thermally controlled 140mm fan
PFC Active
Main Connector 20+4Pin
+12V Rails Single
PCI-E Connectors 4 x 6+2Pin
NVIDIA SLI Support Yes
ATI CrossFire Support Yes
Efficiency > 80%
Energy-Efficient 80 PLUS Certified
Input Voltage 100 - 240 V
Input Frequency Range 50/60 Hz
Input Current 10A
Output +3.3V@30A,+5V@28A,+12V@60A,
-12V@0.8A,+5VSB@3.0A
MTBF >100,000 Hours
Approvals UL, CE, CB, TUV, FCC, CCC

[frost]

if that isent enough i chose this 1.

Type ATX12V V.2.2
Maximum Power 950W
Fans 135mm Silent Fan
PFC Active
Main Connector 20+4Pin
+12V Rails 4
PCI-E Connectors 2 x 6Pin, 2 x 8Pin
ATI CrossFire Support Yes
NVIDIA SLI Support Yes
Modular Cabling Support Yes
Efficiency 84%
Over Voltage Protection Yes
Overload Protection Yes
Input Voltage 100 - 240 V
Input Frequency Range 50/60 Hz
Input Current 11A
Output +3.3V@30A,+5V@30A,+12V1@20A,+12V2@20A,+12V3@25A, +12V4@25A,-12V@0.8A,+5VSB@6.0A
Approvals CB, CE, FCC, TUV, cUL

This thing is like $170 w shipping and tax. If any 1 knows one that is cheaper post it plz.

[mjc]

Who makes them? Model numbers???

A genuinechinesejunk PSU that is rated at 10,000W may not be enough, but a quality moderate to high end model from a reliable manufacturer, in the 600W range could be plenty.

It isn't about the sheer number of Watts...it is all about the quality.

[frost]

The 1st PSU is CORSAIR CMPSU-750TX 750W ATX12V

The 2nd is COOLMAX CUG-950B 950W ATX12V V.2.2 Power Supply

[frost]

anyone got anything to say?

[Paquito]

The minimum power required per card is 450 watts X 3 = 1,350 watts. Assuming a 80% working power, then your would require 1350/0.8 = 1,687 or 1,700 power supply.

Since the nominal minimum power label is based for a single stand-alone system and in your case you will be using a single CPU/fans/others configuration with three video cards (I mean not three stad-alone systems) you might be able to make it run with a 1600 watts PSU. Dont take any risk, thou. If you can get a 1,800 watts PSU you will be in the safe side. ;)

However as mjc said, quality has a significant impact. Look up for a NMIC (Not Made in China) PSU. :D

Regards. :)

[saphalline]

If you have many drives (optical and HDD) and more than one expansion card, and if you're talking about 9800 GTX (not 9800 GTX+) vid cards, and if you do any OC'ing, then you may find 750W to be a bit tight. Otherwise, it's fine.

Triple-SLI and Triple-CrossFireX certifications for PSU's usually start at 700W and go up from there. It all depends on how much hardware you're running.

[frost]

k thx alot.

[GarethGerlag]

Hi guys Iam wondering if you can help me. Idont think my pc is getting enough power. What PSU would do the trick. I have 3 IDE hard drives a 40GB, a 80Gb and 160 GB. A ide DVD writer. A 250 GB Sata HD. 4GB 800mhz ram. Intel 2.2 Core2Duo CPU. 8600GT gfx. 4 Fans. 1 Ite raid card. 450Watt neo power supply.

Please can somebody tell me what kind of PSU would be good