Sufficient PSU?

[DrgnRebrn]

I am using an older Antec True550 - the original True Power Series 550W PSU. I am wondering if this PSU would be sufficient enough to sustainably power a new AMD-based system with the following components:

CPU: AMD Phenom II X3 705e
MB: Gigabyte GA-MA790GPT-UD3H
Memory: Crucial DDR3-1333 4GB (2x2GB) Dual-Channel CAS 9
HDD: 1x WD Green 1TB SATA II

There will be one older IDE DVD-RW drive for the time being, but I will be upgrading to a SATA BD Drive & a SATA DVD-RW drive, adding 2-3 additional HDDs, as well as adding a discrete MSI 5770 Radeon graphics card. I will most likely upgrade to a TruePower New 550W PSU at the same time, but am looking to put a sub-$350 HTPC system together that will serve as a partial HTPC until I can afford to finish the rest of the system. With all of the above parts (excluding the HDD, which I already own) I'm @ $320, and therefore would like to try using my current PSU if I can get away with it. Here are the PSU stats:

AC Input: 115V/12A, 230V/6A; 60Hz/50Hz
DC Output: +5V / +12V / +3.3V / -5V / -12V / +5V SB
Max: 40A / 24A / 32A / .5A / 1A / 2A
Min: 0A / .8A / 0A / 0A / 0A / 0A
+5V, +12V and +3.3V max load 530W

My biggest concern is the 24A max on the +12V rail, I don't know if it would be sufficient to provide stable power to my new system; however all of the components I have chosen are rated at low power usage & I am not intending to be using the system at anywhere close to max load. I also am not worried about OV'ing potential, since the CPU I've chosen has locked multipliers & is not intended in any way for OC'ing.

 

[psyklone2k7]

All i can say is my 550W corsair can't run a build with lesser specs. hd 4870, single hdd etc is my build, you can see where this is going.

650w TX corsair is £70 @ ebuyer, don't know if this is beneficial to you but i wouldn't skimp on the power supply and those components will require at least 650w i would say

but i would wait for more advance input before making any decisions i am just giving you what i know based on my current issue with PSU

 

[DrgnRebrn]

Thanks psyklone2k7. Up until I complete my build, I will be using the on-board graphics, so I am hoping that I can get by until that time comes. When I do finally complete my build (maybe around tax time...) I will def upgrade to a +600W PSU, most likely the Antec TruePower New TP-650 or the Corsair CMPSU-620HX.

 

[jsc]

No. A 400 watt Corsair 400CX with it's 30 amp 12 volt rail will power OP's listed system. The original Antec might, but I too would be worried about the relatively light 12 volt rail.

 

[DrgnRebrn]

My only hesitation about going with a lower-wattage PSU after I complete my build is I want to have 2x 5770 GPUs in crossfire. Everything I read says a 600W+ PSU is highly recommended when running a crossfire setup.

 

[jsc]

Now that's a different matter. Something like a 650 - 750 watt PSU will do. I'd go with a Corsair TX750w here.

 

[DrgnRebrn]

Different story - true, but one that won't become a reality for at least 5-6 months. I've also made a few changes to my components list; however I don't believe it will effect my PSU dilemma. I'm sticking with the same CPU, but I am going with an Asus M4A78T-E 790GX MB & G.Skill 4GB (2x2GB) Dual-Channel DDR3-1333 (F3-10666CL8D-4GBHK). This raises my cost to $344, but I'm still under my $350 budget.

 

[shubham1401]

If you are using onboard gfx then your PSU will be adequate.

 

[DrgnRebrn]

Well, my wife put down her foot & has asked that I not disable our other PC. So now I guess this thread is somewhat obsolete because I am now having to buy a new PSU for my HTPC build.

I have chosen an Enermax Liberty 500W PSU - ELT500AWT for this solution.