Solved New build PSU advice

Asus / Rampage iv extreme x79
September 5, 2012 at 15:03:34
Specs: Windows 7 64 bit, Intel Core i7-3820 3.60GHz 16Gig G.Skill DDR3
Hi everyone,

After having some problems with my old pc i decided to give the old machine (fixed) to my little one and build myself a new machine.

I know that the components i have selected may not be ideal for the type of board i chose but my budget and needs kind of dictated what i could buy, bar the board, i read a few reviews and saw some videos and well liked this mobo.

Here is what i have built:

Mobo: Asus Rampageiv Extreme

CPU: Intel Core i7-3820 3.60GHz (Sandybridge-E) Socket LGA2011 Processor - Retail

CPU Cooler: Intel 2011 CPU Cooler

GPU: MSI GeForce GTX 560 Ti HAWK 1024MB GDDR5

RAM: G Skill 16gb DDR3-1600 CL8 Ripjawsz F3-12800CL8Q-16GBZH 8-8-8-24

SSD: Sandisk Extreme SSD3 (for OS only)

I already had the following drives all sata

500gig western digital blue (films)
500gig wester digital black (software)
500gig western digital (my work)

I also used my old PSU ThermalTake Toughpower 750w

The sticker on the side has the following info

+5v +3.3v +12v1 -12v +5VSB

28A 30A 18A 0.3A 3A

Note there are four +12v rails all at 18A
Note i couldnt see the last part of the sticker properly so not sure is "+5vSB" is correct

My question really is then is this PSU suffient for my hardware? Im not really an avid overclocker as im not very familiar with it though will like to learn and maybe be tempted to OC at some point.

Not sure if my RAM and CPU choice was appropriate for OC'ing Probably the i7-3930 would have been a better choice but way too expensive.

I do play some games on my pc likes of gta, battlefield, crysis etc.... But do more programming and video editing.

I run Windows 7 Ultimate 64bit SP 1

Any comments/suggestions will be greatfully recieved.


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September 5, 2012 at 15:11:34
Best to get a good quality PSU for around sixty quid with a single 12V rail 40A this is good:

BTW Ebuyer is usually cheaper than Novatech...

ARM Devices are the future, great British Design !

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September 5, 2012 at 16:41:39
Why are you bothering to post this configuration NOW if you have already built the rig?

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September 5, 2012 at 20:19:58
✔ Best Answer
Your PSU can combine the four 18A rails into 60A. I'd say that's more than enough to power your rig. I run a 3930k at 4.2GHz (stock voltage) and an overclocked GTX-670 off a Seasonic X-560 with a single 46A rail. The PSU fan never kicks into high gear; not even after hours of rendering.

mATX Beast | LGA2011 i7-3930K @ 4.2GHz | 16GB quad-channel DDR-1866 | GTX 670
240GB SSD+2TB HDD | Asus Rampage IV Gene | Seasonic X560 | Silverstone TJ08-E

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Related Solutions

September 6, 2012 at 00:50:54
Hi Jolicloud,

Thank you for the suggestion. I did read somewhere that a single 12v rail is better than multiple, but then i also read that multiple rails are better. Though this does look good.

I am bothering to to post now as i have a question and needed some advice. I was always going to buy the spec that i have bought however the PSU i already had, so just wanted to know if it was suffient for my built. if not then i would have bought a new one.

Just the answer i was looking for, i wasnt quite sure about how the multiple rails worked, but if they can be combined to produce 60A then as you say it should be sufficient for my machine. Good man thanks :)

Thanks everyone.

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September 6, 2012 at 04:36:24
The way I understand it, the current from each of the 12Volt rails is carried on different wires in the bundles and most of the bundles (like the SATA, Molex, and 4pin CPU) connectors carries the power from only one of these rails. Only the 20/24pin motherboard connector carries all of them though I believe that the 6pin PCIe connector and 8pin CPU connector probably carries two of them. PCIe/Molex 'Y' adapters can bridge two of these rails, but only if they are connected to Molex connectors on two different wire bundles. Therefore if the video card uses two 6 pin PCIe connectors it is theoretically possible that you might be able to pick up all of the rails, but it may be nearly impossible to tell if you have plugged into all 4 rails or have picked up the same one 2 or 3 times. You also want to use Molex connectors on more than one or two bundles so that the wires can carry more current than a single one can. It also is possible that your power supply has two 6pin PCIe connectors and that it was intelligently designed and it does connect to all 4 of them between them, but I am not sure how to tell this without asking the manufacturer.
There are others who will probably know more of this for sure and in more detail and this may be oversimplified, but it should give you the general idea.
Personally, I would go with a better more modern design with a single 12Volt rail, 80% or more certified efficiency, an active PFC, a long warranty, and a quality name brand. The Corsair linked to above should do it.

You have to be a little bit crazy to keep you from going insane.

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September 6, 2012 at 06:49:34

I apologize for reading hastily.

Not to argue with others opinions but I don't think it is a simple matter to recombine those four rails.

One rail should be dedicated to the CPU. You can identify that one by the special 4,6, or 8 pin two row connector/s you plug directly into the motherboard.

Another rail will be dedicated to the graphics card/s. You can identify that one by the special connectors for auxiliary GPU connections.

The other two rails should be available for general use. The problem is that you don't really know where the main power is being pulled from, as Fingers mentioned above.

Multi 12V rail PSUs may be a good idea in theory but in actual practice they sometimes don't have enough Amps on the rail where it is needed.

The graphics card you have can pull up to 225W at full load. That converts to 150W off the 2-6 pin GPU connectors and 75W off the PCI 16 slot.

Converting the wattage: 150W = 12.5A@12V. 6.25A@12V. Your PSU MAY be able to power that card but we don't know where that 6.25A is being pull from. If from the same rail as the dedicated graphics rail then you would be overloading that rail.

To work things backward take the 4 18A@12V rails and convert just those rails to watts.
18A x 12V = 216 x 4 rails = 864W. Obviously these potential numbers are being fudged by the manufacturer. You may be able to pull 18A from one or two of the rails simultaneously but not all 4. This doesn't even address where the 5V & 3.3V rails come into play.

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September 6, 2012 at 07:34:54
Hi Fingers, OtheHill

OtherHill, no problem at all, i tend to skim read a lot myself - apologise if my response came across rude.

Thank you both so much for the explainations. I dont really know enough about PSU's to have known the information you both have provided, this is very helpful and good to know for next time. My math skills are pretty weak to be honest, i wouldnt know where to start, coupled with poor knowledge of how PSU's work I needed to ask the question.

I think i will buy a new PSU just to be on the safe side. I have noticed that my PSU runs pretty hot when im gaming - not sure if this is a sign it is being pushed too hard?

I have read some reviews, and saw videos online for the Asus Rampage iv Extreme and noticed most of the users are using the Corsair Professional Series Gold AX 1200W Modular PSU with this board - they are however running SLI which i am not (yet)

Over kill perhaps?

Would you mind giving me your thoughts please?


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September 6, 2012 at 11:52:19
Some PSUs marketed as single rail units are actually multi-rail units; they just combine the rails like your Thermaltake does. The Corsair TX750 is a popular PSU that's marketed as a single rail unit, but actually shares current between rails. I wouldn't be surprised if the rest of Corsair's entry- to mid-level PSUs (and therefore, the Seasonic PSUs they're based on) are also multi-rail designs internally.

"Interesting to note are the two different solder points for +12V. At one point we can find yellow and black cables and a "12V2" silkscreen on the PCB—just like the S12D design. That means this isn't a real single-rail PSUm and in fact most PSUs aren't multi-rail designs. Instead, they share the current between more than one output rail."

Honestly, the multi-rail vs single-rail thing isn't as important as people seem to think. There are many high-end single-rail units, just as there are many high-end multi-rail units available. If you ever decide to overvolt your processor or add a second graphics card, a new PSU might be a good idea; an overvolted SB-E is the CPU equivalent of a Suburban. However, your Thermaltake will have no problem with your current configuration.

mATX Beast | LGA2011 i7-3930K @ 4.2GHz | 16GB quad-channel DDR-1866 | GTX 670
240GB SSD+2TB HDD | Asus Rampage IV Gene | Seasonic X560 | Silverstone TJ08-E

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September 6, 2012 at 21:40:54
I think 1200 Watt is overkill unless you plan on using multiple graphics cards. A really good 750Watt (or anything close) in a single rail design would work the best.
If you want to try yours, be my guest, just test it with everything running like an antivirus scan while you are gaming, etc. with HWMonitor open and see if you have any problems, graphic hesitations, etc. and see if it can stand the loads.
If your CPU, GPU or other temps are high, that is a separate issue basically. Depending on how hot they peak under full load and how quickly they cool down, it may be an issue, or it may not.

You have to be a little bit crazy to keep you from going insane.

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September 7, 2012 at 02:23:42
Thanks guys, i think the first thing i will do is test my PSU like Fingers suggested, under load. That will determine what i do next. I am considering over clocking only becuase i want to learn how its done. So maybe after checking the capability of my psu i feel i need to get a new one i might just go ahead and bite the bullet. How do you guys keep up with all of this information? Thanks

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