Hi,
I feel free to clarify some general misudnerstandings of power supplies and cpu's:
ATX12V spec puts the CPU on it's own rail. Typically, this rail is capapable of 16 to 20A. Twice what your Pentium D requires.
=> You (and 99% of the world) confound TDP and maximum power consumption. TDP reflects the heat dissipation at peak. Not the power consumption. So high-end cpu's can really consume peak 24A.
Where dual 12V rails comes into question is when you have multiple video cards (SLI or Crossfire, take your pick) and either both cards are on 12V1 and they're robbed of power because of all of the other devices on 12V1 (HDD, CDROM, fans, lights, etc.) or both cards are on 12V2 taking away from the CPU.
But if you're using one PCI-e card, you're perfectly fine with a dual 12V rail power supply.
If you're running SLI with a Pentium D, I suggest a tri or quad-rail that puts the PCI-e on it's own dedicated rail.
=> This depends on setting of MB. You can put them variously, to balance, since cpu & gpu(s) are not at same time at full load.
The concept of less VA going through a single regulator is still ultimately the best practive. It's suggested by both Intel and the UL for a reason. 😉
=> Also for stability. When you have 3-5 consumers on one rail (for cables too), the power reaches the consumers unstable.Like when 5 persons drink from one glass at the same time. They dont get the water continuously. The less consumers per rail the better. But this effects only cpu & gpu & mbu significantly. If you have quad SLI 4 rails are must, besides enough power. I assume now 4 7800 GTX, not 4 6600GT 🙂
I feel free to clarify some general misudnerstandings of power supplies and cpu's:
ATX12V spec puts the CPU on it's own rail. Typically, this rail is capapable of 16 to 20A. Twice what your Pentium D requires.
=> You (and 99% of the world) confound TDP and maximum power consumption. TDP reflects the heat dissipation at peak. Not the power consumption. So high-end cpu's can really consume peak 24A.
Where dual 12V rails comes into question is when you have multiple video cards (SLI or Crossfire, take your pick) and either both cards are on 12V1 and they're robbed of power because of all of the other devices on 12V1 (HDD, CDROM, fans, lights, etc.) or both cards are on 12V2 taking away from the CPU.
But if you're using one PCI-e card, you're perfectly fine with a dual 12V rail power supply.
If you're running SLI with a Pentium D, I suggest a tri or quad-rail that puts the PCI-e on it's own dedicated rail.
=> This depends on setting of MB. You can put them variously, to balance, since cpu & gpu(s) are not at same time at full load.
The concept of less VA going through a single regulator is still ultimately the best practive. It's suggested by both Intel and the UL for a reason. 😉
=> Also for stability. When you have 3-5 consumers on one rail (for cables too), the power reaches the consumers unstable.Like when 5 persons drink from one glass at the same time. They dont get the water continuously. The less consumers per rail the better. But this effects only cpu & gpu & mbu significantly. If you have quad SLI 4 rails are must, besides enough power. I assume now 4 7800 GTX, not 4 6600GT 🙂
