+12V -12V Voltage Variations

I've had my Antec SL400 running for about 4 years now. I ran SIW the other day and found that my +12V is coming in at 12.96 and -12V at -12.96. +5 and +3.3 is fine, -5V is at -5.46. Most importantly, core voltage is set in bios at 1.65V but is being picked up by BIOS and SIW at 1.71 - 1.74V. My temps in SIW are as follows:

MB 26C
CPU (Socket) 63C
CPU (Die) 41C

I'm worried that my power supply is starting to die, but don't know if these variances are within tolerance. Should I even bother with a new PS? I am planning on building a new PC within the next year and a half (need money :p), so I don't want to put out a bunch of money. To get this one up to speed I was going to buy:

Rosewill Stallion 400W (if needed)
Saphhire Radeon 9550 256MB 4xAGP (i dont have a 8x slot)
1GB PC2700 Patriot memory
80GB WD ATA100hd

Total cost including shipping and tax: $233

My current specs are
Asus A7V-333x
Athlon XP 2600+ 2.08 Ghz (this oddly is read running between 1.971 and 2.07 GHz)
768 PC2700
12GB Maxtor HDD
Radeon 9000 Pro 64MB 4xAGP

Is it even worth it or should I ride what I have to the death and try and afford a new one? Further, should I by the Rosewill or spring for something a little better?
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More about voltage variations
  1. wow that's high - and out side a 5% spec

    too high is weird if was not before it could be a sign of impending disaster if the psu is have difficultly knocking down the 120v

    well looking at your system you could upgrade for $200 on ebay -- i think its time for an upgrade?
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