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Is this bad?

B

bladeiai

[H]ard|Gawd
Joined
Dec 26, 2004
Messages
1,126
I was just monitoring my voltages with everast because I was reading about how xconnects voltage drops under full load, and in everest it says my +12V is at 11.86 v when I am playing games... I assume this is bad and I should get a new power supply?(its at 12.16 v when I'm just idling, and the 12v is the only one that drops)
 
The mainboard's voltage sensors are usually uncalibrated and quite inaccurate. However, a delta-V of .30 V (2.5%) when going from idle to load is quite significant.

Verify those measurements with a DMM.
 
ok I got a multimeter and checked the 12v and it goes from being at 12.23 to 12.26 just idling in windows to right at 12.00 when playing games like fear. is that ok?
 
bladeiai said:
ok I got a multimeter and checked the 12v and it goes from being at 12.23 to 12.26 just idling in windows to right at 12.00 when playing games like fear. is that ok?
Click to expand...
0.26V fluxuation = 2.167%, not good, but not a disaster either.

What PSU & system specs?
 
bladeiai said:
ok I got a multimeter and checked the 12v and it goes from being at 12.23 to 12.26 just idling in windows to right at 12.00 when playing games like fear. is that ok?
Click to expand...

I'm generally not comfortable with more than a .1v sag under load....
 
4000+ sandy(water)
MSI neo4 Plat/sli
2 gig ram
bfg 7800GTX
xconnect 500w psu
 
So you're looking at your voltages, not because you're experiencing any problems but because of what someone had said about your power supply. Interesting. :rolleyes:

Going from idle to a game, you're probably going from a 4A to 14A load on your 12V rail. Because you're going from no drive activity, no GPU processing, little to no CPU utilitzation... and then BAM! Everything hits the 12V rail at once.

On my load tester, I've only found one power supply that doesn't drop that much during a drastic load difference and that's a PC Power and Cooling Turbo Cool 510.

IMHO, I think you're fine. ;)

But do keep in mind what Dave said... NEVER EVER EVER trust software. If you're curious, use a multimeter.
 
Schro said:
I'm generally not comfortable with more than a .1v sag under load....
Click to expand...

And you're using an FSP?

I call shens. An FSP drops more than .1V going from idle to load.
 
jonnyGURU said:
And you're using an FSP?

I call shens. An FSP drops more than .1V going from idle to load.
Click to expand...

I don't notice the .1V on my Fortron...

The drop is .06v between load and non-load. I can provide evidence if it would float your boat
 
jonnyGURU said:
So you're looking at your voltages, not because you're experiencing any problems but because of what someone had said about your power supply. Interesting. :rolleyes:

Going from idle to a game, you're probably going from a 4A to 14A load on your 12V rail. Because you're going from no drive activity, no GPU processing, little to no CPU utilitzation... and then BAM! Everything hits the 12V rail at once.

On my load tester, I've only found one power supply that doesn't drop that much during a drastic load difference and that's a PC Power and Cooling Turbo Cool 510.

IMHO, I think you're fine. ;)

But do keep in mind what Dave said... NEVER EVER EVER trust software. If you're curious, use a multimeter.
Click to expand...
I did use a multi meter, and I checked it because whenever I try to overclock the cpu and raise the voltage my computer locks when I run 3dmark
 
Do you have access to ANY other power supply you can try in there right now to see if the errors go away when you overclock and run 3DMark?

I say that because, quite frankly, that kind of problem could be ANYTHING. I'd just hate to see you run out and buy another power supply and have it not fix your problems. Of course, if you do switch it out, make sure you report back and let us know if it fixed things for you.
 
Schro said:
I don't notice the .1V on my Fortron...

The drop is .06v between load and non-load. I can provide evidence if it would float your boat
Click to expand...

I appreciate that, but it would mostly be idle chatter similar to reading a review of a power supply that was simply thrown in a build and voltages checked with MBM (not that you would ever do that. ;) )

I use FSPs daily. They're my PSU of choice for builds due to their cost/reliability ratio. But if I put one on my load tester and give it a fixed load and then crank it up 10A on the 12V rail, the 12V does drop more than .1V.
 
jonnyGURU said:
I appreciate that, but it would mostly be idle chatter similar to reading a review of a power supply that was simply thrown in a build and voltages checked with MBM (not that you would ever do that. ;) )

I use FSPs daily. They're my PSU of choice for builds due to their cost/reliability ratio. But if I put one on my load tester and give it a fixed load and then crank it up 10A on the 12V rail, the 12V does drop more than .1V.
Click to expand...

I'll give you that- I don't claim to be a PSU guru or have a qualified testing station- just a multimeter and a few systems here (and I've built hundreds using FSP supplies). I don't think my system has a 10A difference between loaded and loaded, which explains why I'm not seeing the drop.

The reviews you mention are rather sad and border on comical- some go further than MBM and actually perform testing based upon BIOS values :rolleyes: .
 
Schro said:
The reviews you mention are rather sad and border on comical- some go further than MBM and actually perform testing based upon BIOS values :rolleyes: .
Click to expand...

BIOS... MBM... What's the diff? ;)

I think SilentPCReview did a great job of finding the differences between idle and load and actually found almost a 10A difference from idle to load on some of the builds (the S939 for example.) I was actually going to build a test rig and do the same thing so I could figure out if my loads were realistic. Got to give Devon and Mike credit for doing the work for me. ;)
 
well the other reason I was thinking about getting a new psu is that I am going to get a second 7800gtx and I just dont think the xconnect would be able ot handle it(or am I wrong?) but would the enermax 535w sli really be enough for 2 7800gtxs(and I'm planning to overclock everthing)
 
bladeiai said:
well the other reason I was thinking about getting a new psu is that I am going to get a second 7800gtx and I just dont think the xconnect would be able ot handle it(or am I wrong?) but would the enermax 535w sli really be enough for 2 7800gtxs(and I'm planning to overclock everthing)
Click to expand...

I can't say from personal experience it would or would not work. I only have a pair of 6600GT's on mine. But the more power supplies I test, the more I get on a dual 12V rail kick and that's something your X doesn't have. I've quickly learned the importance of a couple smaller 12V MOSFET's instead of one big one. :D So for that reason alone, I'd say go for an upgrade. ;)
 
my ultra idles @ 11.63- to 11.8v

under load it will drop all the way to 11.05v

on the asus it sets the low voltage alarm --the DFI just crashes with it . yea i multimeatered it--

pulled it and put in 550w TC 2.0 antec and it fixxed all that .

but i got the thing free with a case--so i wasn't expecting it to be much . it is retired to a old pentium 3 setup with intergrated vga--
 
I'd RMA it, even if you do end up using it with a "lesser" PC. I've never seen one run with that low of voltages. I definitely think it's safe to say there's something wrong with it! :eek:
 
jonnyGURU said:
I'd RMA it, even if you do end up using it with a "lesser" PC. I've never seen one run with that low of voltages. I definitely think it's safe to say there's something wrong with it! :eek:
Click to expand...
Yea, it should have a 3yr warranty & you can always use it somewhere (Duron/P3 print server). ;)
 
it seems to pull the old P3 ok
-since

i hardly ever use the old box for anything--the old POS ain't even worth the time or shipping cost--LOL :eek:
 
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