Ok I'm trying to upgrade my processor and need some info. about the power supply. Will I need to upgrade my power supply? I have a 300 watt supply. The processor I'm looking to upgrade to is AMD Athlon 64 X2 Dual-Core 6000+.
MY mother board is MCP61SM-GM 2DIMM w/O 1394 PCIe.
>> General Information
Type : AMD Athlon 64
Internal Specification : AMD Athlon(tm) 64 Processor 3800+
Model Number : 3800+
Codename : Lima
Technology : 0.065µ
CPU ID : F.F.1
CPU IDEx : F.7F.1
Brand ID : 4
Microcode : MU0FF10
K8 Revision : 6.0
CPU-Z doesn't show wattage, but once you know which processor you have, then you can find that info at AMD.com. Since you already posted that you have a 3800+ Lima and that you want to buy an Athlon 64 X2 Dual-Core 6000+, it was easy to find out their wattage.
The need for a better psu is mainly driven by the vga configuration. Assuming that will not change, and you are running ok now, then you will probably not need a better psu for a slightly hungrier dpu.
That said, a stronger psu will run more efficiently and quieter if it has some capability in reserve.
Look for a 450w unit from corsair or PC P&C, particularly if you may want to upgrade your vga card in the future.
First, my bad for missing the Lima thing in the specs post.
I have to agree with the Phenom II X2 550 argument, if it's supported. That or an X2 Kuma 7750/7850 would be a better choice than the X2 6000+. 2 MBs of L3 cache works wonders over none at all, even at their lower stock-clock speed. You should probably check with Gateway (maybe even ECS) for a BIOS update to support these "newer" processors.
As for power concerns, there are plenty of excellent 400-450W PSUs available at Newegg.com for 30-50 dollars. (I just bought an Antec earthwatts EA430 for $49.99.) Many (not all) of them are of newer design, which means they're more efficient and supply a solid amount of 12V power, which is exactly what more modern PCs need.