I’m updating my so-called “recording” computer (I was thinking about maybe FX-6000-series or early i5 CPU:s) and long story short - I got drunk and now I have i7-4770K.
The setup would now then be:
- i7-4770K (using IGP, so no discrete GPU card)
- (Some motherboard, don’t know exactly yet)
- 8GB RAM
- M-Audio Delta 1010LT sound card
- DVD-drive (not absolutely necessary…)
- One or two SATA-hard drives (7200rpm)
Now when looking at power consumption figures in different tests (for example this or this) the full CPU load consumption figures are well below 200 watts. Even if utilizing the IGP 100% at the same time it would raise the wattage, about what, 20-30 watts?
So, first of all - the figures lead me to believe that the i7 setup would consume about as much power as my trusty old Athlon 4400+ x2 setup (with 4GB RAM, 2x DVD-RW, 2 TV-cards, case fan, 5xHDD and 8400GS GPU)?
I have run the 4400+ setup with the 350W PSU so the question is that would it be enough to run i7?
When looking different motherboard manuals, some state that “500W or greater PSU is recommended”. Why in earth, if in tests system under full CPU load is under half of that?
Yes, I know, it’s stupid to use old PSUs with (too) high-end CPUs but the 350W is a spare, so if it can do it, why not to put it in use. The PSU is single-rail model and apparently puts out max of 20A in +12V rail. Correct me if I’m wrong but the main concern using old PSU:s is the amperage from the +12V rail? Is the 20A enough?
Does anyone have somekind of experience about “how low can you go” - or maybe has someone measured their power consumption with 4770K? Also if someone has a prebuilt brand-name machine with i7 - could you get me some specs about the PSU (wattage, +12V amperage), probably the brand name machines have as small PSU:s that can be.
And are these 700W plus PSUs just meant for people using big, hungry gaming GPU’s and without them they are really not needed? (for argument’s sake let’s leave the servers and their PSU:s out).