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Upgrade my power supply?


New Member
Apr 19, 2005
20 (0.00/day)
I have a 9 month old Antec 300w power supply that came with my case that says it has 15A to the 12v rail. I currently have an Asus mobo, Barton 2800+, eVGA 6600GT, and an 80 gig HD in there. Runs perfect. I'm upgrading to an ASRock Dual SATA2, Opteron 146, ATI X800 GTO modded to 16 pipes. Do you guys think I need a new power supply, or will this one do the job? I'm only spending $430 for the three new parts and really don't feel like throwing another $50-$75 into this unless it's absolutely necessary.


EDIT: Just thought about something. My new card will be PCI-Express. I'll need a new power supply regardless, right?
Last edited:
Mar 27, 2005
1,005 (0.22/day)
South Africa
Processor Intel i7-920 @ 4.0GHz LGA1366
Motherboard Intel DX58 Smackover Motherboard
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Display(s) 24" Samsung SA350 + 24" BenQ G2410HD + 2x 22" Samsung 2253GW's + Hyundai 19" B91D+
Case Coolermaster CM690
Power Supply Corsair TX750W PSU
Software Windows 8.1
Yeah, you would definitely need a new PSU. Maybe a 350W could've worked but I think the 300W is just a tad too weak for the 146 and GTO. Also, like you said the PSU needs to have the 6pin PCI-Express connector as well. I guess you could get an adaptor for it but I wouldn't recommend it. A 400W good quality PSU should be sufficient. It will be a kick-ass system once you get the parts though! Good luck. :D


New Member
Apr 12, 2005
2,489 (0.54/day)
System Name Onus
Processor E8500 @ 3.95ghz ~1.25v
Motherboard ASUS P5E Deluxe
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Audio Device(s) HT Omega Striker. Klipsch RF-3II fronts, Yamaha NS-A222 rears, Klipsch RC-3II center, Klipsch SUB12
Power Supply Corsair CMPSU-750TX
Software Windows 7 Ultimate x64, lots of games, photoshop n stuff.
Your 12v amperages are horrible. Try to get something with atleast 20-25a on the 12v rail. I would suggest a 420w OCZ PowerStream if you have the money. Most bang for your buck, awesome PSU.


New Member
Sep 6, 2004
97 (0.02/day)
Processor Intel Pentium Core 2 Duo Wolfsdale 3.00 ghz 45nm
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Power Supply 650 Watt BFG Tech
Software Windows XP Pro (Enterprise)/Windows 7 Ultimate/Ubuntu 9.0.4
400 and up dont go lower that way when u upgrade a part that needs more power u wont need yet another psu.


New Member
Jul 10, 2005
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Case lian-li pc-a70 full tower
Power Supply 650 watt Antec Earth Watts
Software windows 7 and lots of other titles
yes i think the x800 requires a minum of a 350 w power supply so yes upgrade it
Oct 26, 2005
642 (0.14/day)
Madrid, Spain
System Name Sample light
Processor AMD Phenom II 965
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Display(s) too ashamed to tell, but its an acer
Case Lian Li V2000
Audio Device(s) Echo Audiofire 2
Power Supply Corsair VX550
Software Windows XP pro SP3
its not only an issue with watts, you should buy a solid 400 watt minium PSU, but since your going to be feeding that X800 GTO from the PSU, your going to need a PSU with atleast 24 amp on the 12v line, (also makes your machine more stable and gives it better overclocking potential),

i have a 420 watt bequiet, quite a nice PSU, gives 27 amp on 12v, can do 30 at peak (not recommended for long periods), your going to buy good equipment, the 939Dual-SATA with a couple of solder points makes an excelent board, and a X800 modded to 16 pipes can easly reachy XT speeds, but it all depends on the psu you choose,

that 300 watt wont get you very far, especialy with that 16 pipe GTO


New Member
Sep 27, 2005
2,479 (0.56/day)
Processor AMD Athlon 64 3200+ (939)
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Storage Western Digital 160GB
Display(s) ViewSonic VX2025WM
Case Logisys Dracula Case (Black)
Audio Device(s) Onboard Sound, Logitech X-530 Surround Sound Speakers
Power Supply OCZ PowerStream 520W
Software Window XP Pro, Office Suite, Tons of Games
Def. upgrade that PSU. I suggest going for an Antec TruePower, OCZ PowerStream or ModStream or even an FSP. Check out newegg.com they have a few sales on a FSP and the OCZ's PSUs.