Dud Sensor on my HX 750W?

[nightkhaos]

I was doing some stablity tests on my computer last night and the voltage reported on the 12V rail caught my eye... a quick investigation on my overclocking guide and this problem appears to have been occuring for a while. Observe, the extracted screenshot from said guide:



Now if, in fact, the power supply was outputting that voltage on my machine, my machine wouldn't boot, let alone run Prime95 for 8 hours straight.

Would could cause such a false reading, and what can I do to get correct readings, and ensure that under load my machine is actually achieveing the voltages required?

Is this a problem related to the PSU, the motherboard, or something else, i.e. a software bug?

[nightkhaos]

Curious, forums searchs and what not seem to report the following:

The Gigabyte X58 series boards do not moniter the 12V rails

If this is the case, where can I get offical verification from Gigabyte?

[bandsaw]

What about trying Gigabyte's EasyTune6?
http://www.gigabyte.com.tw/Support/M...lity_List.aspx

On an EP45-UD3P it reports CPU, DRAM, +3.3V and +12V.

[nightkhaos]

Originally Posted by bandsaw

What about trying Gigabyte's EasyTune6?
http://www.gigabyte.com.tw/Support/M...lity_List.aspx

On an EP45-UD3P it reports CPU, DRAM, +3.3V and +12V.

The problem is related to the X58 boards, apparently. I doubt another software suite would fix the issue.

[Yellowbeard]

Software voltage readings are notoriously unreliable so I would not suspect the PSU. But, it seems you have figured that out already. If you need to verify your voltages, you'll need to use a volt meter for accurate results.

[nightkhaos]

Originally Posted by Yellowbeard

Software voltage readings are notoriously unreliable so I would not suspect the PSU. But, it seems you have figured that out already. If you need to verify your voltages, you'll need to use a volt meter for accurate results.

It will ease my concern. Any procedure I should follow or can I follow the de-facto standard of:

1. Ground myself or use an anti-static wrist band
2. Whack the probes in the 12V and 0V rails of a free Molex
3. Read what the multimeter says and rejoice as it is in tolerance

[bandsaw]

Originally Posted by nightkhaos

The problem is related to the X58 boards, apparently. I doubt another software suite would fix the issue.

It was only a suggestion based on the fact that it says X58 boards are supported - the P45 reference was simply an indication of what it shows on such a board.

As a side note, with my HX750, 12V @ idle is shown (in OCCT) as 12.42V. Full load sees this drop to 12.29V. Yeah, I know, I know a P45 isn't an X58 but a load is a load.


Given you thought there might be a dodgy sensor in the PSU, should you really be unsheathing the DMM?

[Agent]

Originally Posted by nightkhaos

It will ease my concern. Any procedure I should follow or can I follow the de-facto standard of:

1. Ground myself or use an anti-static wrist band
2. Whack the probes in the 12V and 0V rails of a free Molex
3. Read what the multimeter says and rejoice as it is in tolerance

This will give you the reading from the PSU for that rail, but won't tell you any internal voltages on the motherboard.
Remember that the Molex and the ATX plug are usually on different rails, so one can fluxuate without altering the other. You can of course measure the power in the main ATX block easy enough, just be careful and use small point PSU leads.
But yes, it is that easy

It's not only the software that can cause an issue in cases like this, but also the sensor chips used on the board. They are not calibrated like a multimeter, and are simply mass produced without any consideration taken into account for deviation in results between batches / chips.

[nightkhaos]

Originally Posted by Agent

It's not only the software that can cause an issue in cases like this, but also the sensor chips used on the board. They are not calibrated like a multimeter, and are simply mass produced without any consideration taken into account for deviation in results between batches / chips.

Just checked with a mate of mine who also a X58 Gigabyte UD5, he also has a dud sensor. I think it's just they didn't include the feature in the UD3 series of motherboards for X58. Weird ha?

[Agent]

I have a UD4....so in the middle
Will have a check over the weekend.

[nightkhaos]

Originally Posted by Agent

I have a UD4....so in the middle
Will have a check over the weekend.

Sorry. It's confusing. UD means Ultra Durable 3. UD3 means Ultra Durable 3 type 3.

[Agent]

Ahh yes, see what you mean now

[nightkhaos]

Originally Posted by Agent

Ahh yes, see what you mean now

Glad I'm not alone. Sorry for bothering your Corsair! Keep making your wonderful products...

*looks from his HX750 to the recently purchased H50 a mate got to the XMS3 RAM we have sitting in various builds...*

[Mithrandir]

My Corsair also did not show correct volts in Windows, but in the BIOS it was close.
However, I tested it using a meter and it was very near the volts and rock solid.

[Yellowbeard]

This thread is a great example of why users should never fully rely on software voltage readings. Recently, I had an user absolutely furious with me, with Corsair, threatening to file lawsuits, etc over our PSU voltage not reading correctly in his OS based monitoring utility. After an extended troubleshooting session while he cursed us profusely and ranted and raved about how terrible we were, I FINALLY convinced him to check his software. He noticed that the version he was running did not have X58 MOBO support. Once he upgraded, all his problems went away. I just hope he remembered to call off the hit man.

[nightkhaos]

Originally Posted by Yellowbeard

This thread is a great example of why users should never fully rely on software voltage readings. Recently, I had an user absolutely furious with me, with Corsair, threatening to file lawsuits, etc over our PSU voltage not reading correctly in his OS based monitoring utility. After an extended troubleshooting session while he cursed us profusely and ranted and raved about how terrible we were, I FINALLY convinced him to check his software. He noticed that the version he was running did not have X58 MOBO support. Once he upgraded, all his problems went away. I just hope he remembered to call off the hit man.

I am aware. It was not my intention to complain, merely to find out if there was a way to get a accruate reading. I mean, I can't exactly pull out a multimeter everytime I wanna check a voltage across the 12V rail now can I?

Now that I have found that it is the fault of Gigabyte's Implemtation of the X58 standard, there is of course nothing one can do, least of all Corsair, as it is not your product which is causing this inconvicence.