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What kind of power supply do I need

post #1 of 12
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I have a 8800gts 640mb. I think my psu is struggling to run it. It is an Antec 650watt. What numbers am I looking for in a psu? I know the card says it needs 26a or more. Most power supplies I see have about 6 or 7 different voltage numbers on the side. Any help with this would be great. Also, how would I know my psu is not getting the card enough juice?


p.s. The psu is the antec true power trio 650 watt
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post #2 of 12
What is your budget??
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Black Ice
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post #3 of 12
THIS one is $114.00 after a $25 MIR. It'll handle the 8800GTS no problem.
Black Ice
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Black Ice
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post #4 of 12
I have a 650W PSU. It runs this "power hungry" HD 2900XT night and day. I don't see why you'd need more to run a 8800GTS.
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Mira
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R a z a N e u n
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post #5 of 12
Quote:
Originally Posted by Insco View Post
I have a 8800gts 640mb. I think my psu is struggling to run it. It is an Antec 650watt. What numbers am I looking for in a psu? I know the card says it needs 26a or more. Most power supplies I see have about 6 or 7 different voltage numbers on the side. Any help with this would be great. Also, how would I know my psu is not getting the card enough juice?


p.s. The psu is the antec true power trio 650 watt
Actually Modki is right. Your PSU should be fine. I looked up the specs on it and it puts out 57amps across the 12 volt rails. That should be plenty for the 8800GTS
Black Ice
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Black Ice
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post #6 of 12
Quote:
Originally Posted by Iceman0803 View Post
Actually Modki is right. Your PSU should be fine. I looked up the specs on it and it puts out 57amps across the 12 volt rails. That should be plenty for the 8800GTS
http://www.antec.com/specs/TP3_650_spe.html
* +12V1, 12V2,12V3 maximum output 624 Watts max.

624w/12A = 52A

The PSU should be adequate. If you having issue, you may want to try using the power dongle that came with the card. It is possible that one of the +12v rails are being overloaded.
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Once again...
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post #7 of 12
Quote:
Originally Posted by Insco View Post
I have a 8800gts 640mb. I think my psu is struggling to run it. It is an Antec 650watt. What numbers am I looking for in a psu? I know the card says it needs 26a or more. Most power supplies I see have about 6 or 7 different voltage numbers on the side. Any help with this would be great. Also, how would I know my psu is not getting the card enough juice?


p.s. The psu is the antec true power trio 650 watt
Your issue may be with amps and not watts. I'm assuming this is the TRIO 650 you have. If so, the specs are a multi 12v rail design with peak amperage of 19amps on each rail (amps are not shared between the different rails, if they are not used they are "wasted"). 650 watts is enough to run A LOT of hardware but the amps supplied to each component are sometimes inadequate. In the future, look for PSU's that run only one 12v rail as they are built better and can deliver the right amperage where its necessary. Good luck!
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post #8 of 12
Thread Starter 
thanks guys.
Mine
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3800 x2 asus a8n-sli 8800 gts 640mb 2 gig 
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300 gig maxtor xp 650 watt antec 
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Mine
(13 items)
 
  
CPUMotherboardGraphicsRAM
3800 x2 asus a8n-sli 8800 gts 640mb 2 gig 
Hard DriveOSPower
300 gig maxtor xp 650 watt antec 
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post #9 of 12
Quote:
+12V1, 12V2,12V3 maximum output 624 Watts max.
missed that part thats why I got 57 instead of 52 lol
Black Ice
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Crucial M4 SATA 6GB/s SSD (CT128M4SSD2) OCZ Vertex 3 6GB/s SSD (VTX3-25SAT3-120G) Samsung Blu-Ray Combo Internal 12XReadable and ... Cooler Master Hyper 212 Plus (RR-B10-212P-G1) 
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Black Ice
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Intel Core i5 2500K Gigabyte GA-Z68XP-UD3 EVGA GTX 560 Ti Superclocked (01G-P3-1563-AR) G-SKILL Ripjaws X Series F3-12800CL7-4GBXH (x2) 
Hard DriveHard DriveOptical DriveCooling
Crucial M4 SATA 6GB/s SSD (CT128M4SSD2) OCZ Vertex 3 6GB/s SSD (VTX3-25SAT3-120G) Samsung Blu-Ray Combo Internal 12XReadable and ... Cooler Master Hyper 212 Plus (RR-B10-212P-G1) 
OSMonitorKeyboardPower
Windows 7 Professional x64 Samsung SyncMaster 2494HM (24" @1920x1080) Deck Legend Frost (105 key tactile) Corsair HX850 (CMPSU-850HX) 
CaseMouseMouse PadMouse Pad
Corsair Carbide Series 500R (CC-9011012-WW) Logitech G500 Gaming Mouse Steelseries 4HD Steelseries 63005SS QcK mini Mouse Pad 
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ASUS Xonar D2 (PCI) 
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post #10 of 12
Quote:
Originally Posted by tr8rjohnk View Post
Your issue may be with amps and not watts. I'm assuming this is the TRIO 650 you have. If so, the specs are a multi 12v rail design with peak amperage of 19amps on each rail (amps are not shared between the different rails, if they are not used they are "wasted"). 650 watts is enough to run A LOT of hardware but the amps supplied to each component are sometimes inadequate. In the future, look for PSU's that run only one 12v rail as they are built better and can deliver the right amperage where its necessary. Good luck!
Current (amperes) and power (watts) are directly related. Saying the issue is with amp and not watts does not make sense since we are talking about a set voltage. Current is shared between each rails as is power. You do not have to get a single rail PSU if you understand how to load balance each rail.
Once again...
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Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
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Once again...
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Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
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