Budget PSU for Overlock !!! [Help]

Hi guy. i got a PhenomII x4 955BE . i am about to overclock my cpu so i got some questions about PSU.
1, i know that x4 955 take 125Watt. do it increase when i overclock ?? and how far can it get ??
2,my main ask 8pin for cpu but i just got PSU that have 4 pin so i setup dual PSU (300w)(picture).
http://imagizer.imageshack.us/v2/xq90/923/HnZA59.jpg
everything is just fine. my PC is stable in this situantion ( dual psu) without OC
Is it safe if i overclock in this situation ??
3 dual 300w psu that mean my PC can provide 600w ??
4,i dont know how it work when we increase voltage ??
ex; i increase 1.4voltage. do PSU provide 1.4voltage or Main allow to get 1.4 voltage ??
that why i ask question 3. i think everything will be fine if i overclock at stock voltage
Thank for reading. Sorry for my english.
Reply to Huu Tin
2 answers Last reply
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  1. Huu Tin said:
    Hi guy. i got a PhenomII x4 955BE . i am about to overclock my cpu so i got some questions about PSU.
    1, i know that x4 955 take 125Watt. do it increase when i overclock ?? and how far can it get ??
    2,my main ask 8pin for cpu but i just got PSU that have 4 pin so i setup dual PSU (300w)(picture).
    http://imagizer.imageshack.us/v2/xq90/923/HnZA59.jpg
    everything is just fine. my PC is stable in this situantion ( dual psu) without OC
    Is it safe if i overclock in this situation ??
    3 dual 300w psu that mean my PC can provide 600w ??
    4,i dont know how it work when we increase voltage ??
    ex; i increase 1.4voltage. do PSU provide 1.4voltage or Main allow to get 1.4 voltage ??
    that why i ask question 3. i think everything will be fine if i overclock at stock voltage
    Thank for reading. Sorry for my english.


    Don't do dual psu. 2 bad psu's means twice the chance of them frying your pc. Just get something like a seasonic s12 II 520w those are usually around 50$.
    Reply to jaslion
  2. Adding to that, you shouldn't actually be able to insert 2x4-pins into that header, only a 4+4 or 8-pin cable as I believe the each half of the socket (and plug) is keyed differently. Honestly I'm surprised something hasn't gone pop...

    In answer to some of the questions:

    "1, i know that x4 955 take 125Watt. do it increase when i overclock ?? and how far can it get ??"

    Yes, an overclocked CPU will consume more power than one running at stock settings. In general, power consumption increases linearly with frequency, and proportionally to the square of the voltage (eg double the GHz, double the power consumption. Double the Vcore, power consumption increases by 4x). As to how high it can get, that depends on what voltages you're pushing into the chip, and how much strain your motherboard's power delivery systems can take.


    " 4,i dont know how it work when we increase voltage ??"

    When you set x volts in the BIOS, the CPU will tell the motherboard's power delivery circuitry "Hey, I need x volts". The motherboard's VRMs will then supply the CPU with said voltage, provided that:
    A) the voltage requested is within the VRM's capabilities
    B) the power supply can deliver sufficient current on the 12V rail

    (remember, power = voltage x current, and since the CPU is trying to fix the voltage at say, 1.4v, and for simplicity's sake we will take the CPU's TDP as its power consumption at 125W. This means the power supply must be able to supply 125W, but it feeds the motherboard at 12V, not 1.4, so PSU current = 125W/12V = roughly 10.5A )

    If the above criteria can't be met, either the CPU will throttle down, the PC will switch off, or the VRMs will release the magic smoke.
    Reply to Mightyena
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