A few questions on Psu & Cases

[JohnDoH!]

if these questions sound silly and stupid please forgive me, im not much of a computer guy so... let me apologize ahead of time .

I noticed that a lot of PSU's usually have a fan located on the back near the plug that connects to the power outlet but there are many that have fans located on the top of the psu's also... well... my question is would you need a case with a rear top fan if that were the case? or could you simply turn it upsidedown and let the side and rear fans take care that?

If a case would happen to have a lot of fans, a side, rear and top fan, what would it rely on for power/ability for use? From what I know a fan has 2 wires/cord'thingy'majigs that connect to the computer, one for the psu and one for mobo, right? are fans power cord directly connect to the psu or are both connected through the mobo? do all mobo's come with sockets that support multipule fans or is there term/component I should be looking for? especially the case for old mobo's that connect to semperon or amd 64

back to psu's, i've got the point that +12v rails are standard for all good mobo's but when the term dual +12v comes into play I get a bit confused . If a mobo is a +12v then can it be connected to a dual + 12v Psu? especially older mobo's that go with amd 64 or semperon.

What are the terms SLI Support, Approvals V TUV, UL, CUL, CE, CB, FCC terms all mean?

Hehe i know my questions are a bit fustrating to answer but it be really appricated if someone could walk me through it

 

[ceewi1]

I noticed that a lot of PSU's usually have a fan located on the back near the plug that connects to the power outlet but there are many that have fans located on the top of the psu's also... well... my question is would you need a case with a rear top fan if that were the case? or could you simply turn it upsidedown and let the side and rear fans take care that?

The PSU mounts with the fan downwards.

If a case would happen to have a lot of fans, a side, rear and top fan, what would it rely on for power/ability for use? From what I know a fan has 2 wires/cord'thingy'majigs that connect to the computer, one for the psu and one for mobo, right? are fans power cord directly connect to the psu or are both connected through the mobo? do all mobo's come with sockets that support multipule fans or is there term/component I should be looking for? especially the case for old mobo's that connect to semperon or amd 64

Fans have either one connector or the other. The type that plugs into a 4 pin peripheral power connector on the PSU is probably the better for you.

back to psu's, i've got the point that +12v rails are standard for all good mobo's but when the term dual +12v comes into play I get a bit confused . If a mobo is a +12v then can it be connected to a dual + 12v Psu? especially older mobo's that go with amd 64 or semperon.

All PSUs have +3.3V, +5V and +12V rails. All three go to the motherboard. For PSUs will Dual +12V rail, one rail typically powers the CPU via the 4 pin ATX12V connector, the other powers anything else. Dual rail PSUs aren't typically recommended for older mobos (i.e. Pre-ATX12V), as one rail would remain unused

What are the terms SLI Support, Approvals V TUV, UL, CUL, CE, CB, FCC terms all mean?

Most of those are just regulatory approvals. SLI Support refers to the presence of Dual PCI-E connectors, so you can use two graphics cards. You could form a second PCI-E connector via an adapter anyway, though. SLI Certified refers to PSUs which have been tested and approved by nVidia for use with SLI machines (i.e. two nVidia video cards).

 

[JohnDoH!]

thank you so so much ^^ for the information, even a doe doe brain like mine understood it

 

[ceewi1]

No problem, glad to help.