Excessive power consumption

[Logan.M]

I bought a CD / DVD LG in SATA2 to mount in an old PC with the config is:
- DFI Ultra-D
- AMD Athlon 64 3200+
- NVIDIA GeForce 7300GT
- Samsung SATA2 HD
- 32x IDE CD
- 32x IDE CD
all with a noname power supply PSX-A870 first version, 480W marked in red.

Where it gets funny is that I can connect the CD/DVD LG;
- It is detected by the BIOS
- It is detected by XP
as soon as I put a CD/DVD inside I hear that begins to turn and then my computer turns off. What violent manner. Without this drive everything was working perfectly (in years)

I saw that on my old CD is written: 5V/12V: 1A/1.5A

on the new CD/DVD LG: 5V/12V: 2A/2.5A

I even tried to unplug everything (HD, drive, floppy disk) and can connect the LG, the same effect. Yet my power supply is supposed to provide 10A on 12V max (that is inscribed on the label)

I returned to the store they showed me that the recorder worked well and there is an LG model IDE if I like. I read the label was 5V/12V: 1.5A / 2A (so a little less greedy!)

According to you it is better:
1 - to change power supply (it's expensive )
2 - request that the recorder exchange against SATA2 IDE, that would work with my current pc

Is it not possible that it comes from the motherboard?

[samar69]

Wait, I do not understand you say that you have a power 480W noname, but after you say it provides 10A at 12V? For me that non 120W? More your new drive consumes only 30W and 18W ancient consumed? Wholesale its that? no?

[Logan.M]

I don 't know too but your calculations are air fair ...

the label on the power supply is very ambiguous. And perhaps it on purpose. For example in the table there is no "A" behind the numbers in front of volts but I guess that's the amps! Something like:

+3.3 V:
+5 V:
12 V: 10

And yes it is well written and 480W in large red, outside the table. It may be a scam pure Chinese. I believe that talking about the max input current

As against that I know there is a history of accumulation and yield. When you have a X-watt power supply was never X watts available on a single cable 12V

Bonus question: how do you know that the new drive consumes 30W? Can it not use the 5V and 12V at a time (it's SATA)
therefore 5 * 2 + 12 * 2.5 = 40W?

[Rawko]

Your power supply is officially pure

On a normal power supply, the figure in large writing on the label is the max that can give power to the pc.

On a contrary, he wrote that the power consumed on the outlet, it can give the pc theoretically approximately 25-30% less than what is written on the label.

Theoretically, because trying to spit the power has its 480-30% watt, and you have a nice cut, even a beautiful fireworks if you not bowl

And to top it all, your power supply delivers only 120 watts on the 12V, the voltage on the pc which earns about 80% of the power he seeks.