What is your maximum Vcore fluctuation?

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mordantmonkey

Diamond Member
Dec 23, 2004
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What is the maximum delta of your reported vcore? Including going from idle to load and vice-versa.

I am NOT asking what the deviance is from your BIOS setting.

Please respond with your motherboard model and poll answers if you like.
 
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Doctorweir

Golden Member
Sep 20, 2000
1,689
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Hmm...let me see: Dunno about my current setting, but in the 1.6v days it was like 1.568-1.600 so 0.032.
 
lopri

lopri

Elite Member
Jul 27, 2002
13,310
687
126
With ASUS A8N-SLI Premium and X2, vcore dances like there is no tomorrow. I've seen the low of 1.324 to high of 1.504 when I set it @1.45V. Worst board ever. Thankfully I have a very early sample 4800+ that performs exceptionally, so it's quite stable when overclocked. I'd love to try this chip on my new DFI board but I'm afraid of ruining my current setup. It's been up and running for 6 months with lots of important data.

 
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MBentz

Golden Member
Jun 8, 2005
1,049
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With the board in my sig, it seems like the deviation is anywhere from .02 - .04.
 
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mordantmonkey

Diamond Member
Dec 23, 2004
3,075
5
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So, it's seems the board makes a bigger difference than the power supply regarding stable voltages. I've had an ASUS and now a ASRock and both boards fluctuated by about .03-.04 even after a PS change.
doesn't the DFI nf4 have extra power connectors on the board for voltage stability?
 
C

CP5670

Diamond Member
Jun 24, 2004
5,657
758
126
It always stays at 1.465V for me with the settings I use. Although some Vcore / VID percentage combinations make it undervolt a bit on load.
 
rise

rise

Diamond Member
Dec 13, 2004
9,116
46
91
Originally posted by: MADMAX23
In my case, 0 fluctuation, always the same value: 1.568v
Click to expand...

take the reading with a dmm and report back :p
 
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5t3v0

Senior member
Dec 22, 2005
508
0
0
I tried to start a similar thread for Epox mobos but didnt get many responses. Here's the details I posted:

Motherboard: Epox 9NPAJ SLi
CPU & Speed: Opteron 144 @ 2.5Ghz
Chosen vcore: 1.55v
Average vcore at idle: 1.56v
Average vcore at load: 1.54v
Minimum vcore: 1.529v
Maximum vcore: 1.578
Diagnostic tool used: Epox USDM
PSU rating: 485W

I get overvolting at idle and then undervolting at full load. Worst possible combo for overclocking. I have now enabled Cool 'n' Quiet which has dropped my idle vcore down to 1.25-1.26 to combat the overvolting. Works a treat.
 
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mordantmonkey

Diamond Member
Dec 23, 2004
3,075
5
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Originally posted by: 5t3v0
I have now enabled Cool 'n' Quiet which has dropped my idle vcore down to 1.25-1.26 to combat the overvolting. Works a treat.
Click to expand...

I might try that. I am Prime95 stable on a 146@2.5 on "stock voltage", which shows 1.39-1.43 in speedfan/cpuz. i'm afraid of bumping the voltage only to find out the board is volting more than i wanted when idle.
i guess i'm what you would call a "conservative OC'er" of course time will probably wear that away.
 
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5t3v0

Senior member
Dec 22, 2005
508
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m8, I'm presuming here but if you still have that 146 in 2 years time I'll be mighty surprised. You'll be onto the dual core craze long before that cpu ever burns out from some moderate overclocking.
 
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Wentelteefje

Golden Member
Dec 6, 2005
1,380
0
0
MSI K8N Neo4 Platinum: 1.46V - 1.38V = 0.08V... :(

ABIT NV8: 1.42V - 1.41V = 0.01V... :)

The MSI has an overclocked Venice 3000+ to 2.4GHz at 1.44V, but CoreCenter says it idles at 1.46V, and under OCCT load, it drops to 1.38V... Leads me to believe that CoreCenter should be renamed to CrapCenter, because I never experienced shut-/lockdowns (which I should have at 1.38V)... The PSU is a ThermalTake PurePower 460W with 29A on the dual 12V rails... I do have a 7800GTX slurping power...

My ABIT sports a stock-clocked (for the moment) Sempron 2800+... The board overvolts a tiny bit, but AbitEQ reports it only skittering some 0.01V... This one is coupled to an Enermax EG365AX-VE(G)W FMA 353W with a single 26A 12V rail... This one's graphics card is a 6800GS... This board has an extra 12V conector as well for extra stability...
 
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5t3v0

Senior member
Dec 22, 2005
508
0
0
Mines with the Epox app that came with the mobo. Speedfan or cpuz both have vcore displays but only to 2 decimal places. The accuracy of Epox's 3 decimal places though is rather dubious.
 
Makaveli

Makaveli

Diamond Member
Feb 8, 2002
4,910
1,498
136
wow I thought my Msi neo 2 platinum was bad for voltages fluctuation. but after seeing some of the above post with other boards, not so sure anymore
 
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WhoKnowsWho

Member
Jul 2, 2005
87
0
0
1.56 load
1.53 idle
Running the 1800 stock speed venice core at 2600
Go figure, it's a Epox 9NPA Ultra board. I didn't notice this before since I am always running BOINC, but then I was playing around with the new heatsink and stuff, and I noticed it.
 
Jeff7

Jeff7

Lifer
Jan 4, 2001
41,596
19
81
1.52 - 1.62v. I think it's set to 1.6 or 1.625v in the BIOS, I don't remember for sure though.
Abit NF7-S v2.0, Athlon XP-M 2400@2.1GHz, with a Seasonic 460W PSU.
That's ranging from idle to full CPU load, over the past 42 hours.

It's weird - my mom's PC has a low-end Enermax power supply and some FIC board running a 733 or 750MHz Athlon at 800MHz (SocketA), and its Vcore is perfectly stable. I'm talking not even .01v change in a day of operation. Crazy.

Originally posted by: Crazyfool
What programs are you guys using for this?
Click to expand...

I still use Motherboard Monitor 5. Its high/low log keeps track of all kinds of system health stats.

Still wish I knew what was up with my 3.3v line though. MBM5 reports it as ranging from 3.04-3.14, but a voltmeter right on the ATX plug shows 3.30v exactly. Thing is, I don't know where to measure on the motherboard to determine exactly how much of that is reaching the components.
 
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Painman

Diamond Member
Feb 27, 2000
3,728
29
86
If I knew where to put the leads, and wasn't paranoid as hell about shorting something out during testing, I'd do it...

Anyway, according to CPU-Z - 1.472, no fluctuation, DFI NF4 Ultra-D
 
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