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I have a dumb question. What do you use the P4 power cable for? I'm just starting this same build now and I'm struggling with it. I see the picoPSU has the 20 pin ATX connector, a 4 pin Berg connector (I think...which connects to the slim internal dvd-rom?), an SATA connector (for hard drive I presume), and finally it has a 4-pin molex connector. Is that what this P4 power cable is for - to connect with the 4-pin molex? What do I need to hook this up to? Perhaps the case fans? The motherboard should have enough fan connectors for case fans, shouldn't it?gtquan wrote:I built a SFF computer with a Nexus Psile case and J&W mini ITX 780g. Thought I'd share the experience.
Parts:
Nexus Psile case - white/aluminum
J&W 780G mini itx
4 GB DDR2
WD green cavier 500GB SATA
picopsu 120 w/ 110 watt AC/DC brick
AMD Athlon X2 4850
Windows XP
Scythe ninja mini
92 mm fan
Not the easiest build. The case comes with IDE DVD drive w/ standard 80pin cable. Unfortunately the power connector is right next to IDE connector on the motherboard and the picopsu doesn't fit well with the IDE cable in place. I might have been able to jam it in. Instead I just bought a 20-24 ATX converter. The motherboard manaul says it would work w/ just a 20 pin connector. Also had to buy a P4 power cable. The power supply is just dangling on a plastic hook I mounted inside the case. Works fine. The case has mounts for a small board DC power supply if you can find one that fits.
G
Around the debut of the Pentium 4, CPU started requiring far more power than they had in the past. This lead to motherboard manufacturers including an additional 4-pin connection between the PSU and MB. Pretty much any socket-based motherboard you buy these days will have it. Depending on what CPU you use, it is not always necessary to make this connection. The P4 cable he is talking about is just an adapter between standard 4-pin molex and this connection -- it is used since the PicoPSU model he has does not natively come with a P4 output.enigma54 wrote: I have a dumb question. What do you use the P4 power cable for?
Thanks for the quick reply! I have the exact same setup as gtguan, which is a j&w minix 780g mobo and an AMD 4850e cpu. Does this mean that it won't power on unless I have a P4 cable connected between the picoPSU and the motherboard?jessekopelman wrote:Around the debut of the Pentium 4, CPU started requiring far more power than they had in the past. This lead to motherboard manufacturers including an additional 4-pin connection between the PSU and MB. Pretty much any socket-based motherboard you buy these days will have it. Depending on what CPU you use, it is not always necessary to make this connection. The P4 cable he is talking about is just an adapter between standard 4-pin molex and this connection -- it is used since the PicoPSU model he has does not natively come with a P4 output.enigma54 wrote: I have a dumb question. What do you use the P4 power cable for?
It's needed with almost any modern board. An i7 will absolutely need one. Probably an 8-pin on most boards.enigma54 wrote:Maybe I need to ask when is a P4 connection needed? Will a Core i7 920 cpu need it with an X58 motherboard?
