Maximus Hero VI Voltage Control

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awartman

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Jun 24, 2013
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Hi Everyone,

I recently purchased the Maximus Hero VI and a haswell 4670k chip, but am having some issues with the vcore control. I can't for the life of me get the chip to stop drawing more voltage than I have set in the BIOS. I have changed the Vcore in bios to manual, and set the vcore to 1.1 for stock (with turbo) clocks. According to CPUZ though, while running prime 95 the chip is still pulling 1.232 volts, which seems high to me for almost stock settings. Is there another option in the BIOS that I need to change to get haswell to stop drawing more voltage?

Thanks!
 
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GeekThief-1354135

GeekThief-1354135

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Jul 4, 2013
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hi i have the Maximus gene VI (m-atx version off the hero) and i belive there is a setting in the bios for different power management.
of the top off my head i can't remember witch on you need to have the volatage stay at a pre set. hopefully i will be able to have a look when i leave off work in an hour or so. unless someone else here knows ?
 
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awartman

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Jun 24, 2013
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That is actually how I was changing the voltage originally. I finally got the voltage stable by disabling EIST. After disabling EIST and re-enabling it the manual voltage control seemed to work properly. It now doesn't change even under prime 95 load. I do however want the system to scale back voltage when idle, so using manual isn't an option. The system seems to run stable at 1.056vcore with turbo enabled, however when the voltage is set to auto it ramps up to 1.232 vcore under load, which is way to high. Right now I have the vcore set to "offset" with an offset of -0.110 v. This means my vcore under load is now 1.120 and idle around 0.6v. Is there a better way to do this or is offset the way to go? I would love to just leave everything on auto but 1.232 vcore for stock with turbo enabled is way to high.
 
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awartman

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Jun 24, 2013
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Basically yeah. I originally wanted to see if I had a bum haswell chip or not, so I was trying to see what kind of modest overclock I could get. I ended up setting manual vcore to about 1.29 for a 4.4 OC, but when running prime CPUZ showed my voltage at 1.33vcore, with temps almost 90 degrees, which is beyond what I was comfortable with. I plan on leaving the chip on stock with turbo enabled for now, but my temps while running prime were around 70 with an h100i, which seems way to hot. With the vcores set to offset and -0.110 my system is stable and my temps are around 60 with prime, so that seems a lot better. I just found it weird that even with manual voltage enabled it seemed that haswell was drawing more vcore than I had set. After disabling and re-enabling EIST though manual seems to work fine, which seems really strange to me lol.
 
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GeekThief-1354135

GeekThief-1354135

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i also have a H100i and my cpu is at stock with defaults settings in the bios. i will prime a quick 20-30 min and see what temps i get if you like ?
but will not be for about an hour as i'm copying 200GB atm (joys off keeping a new pc lol)

PS just had a quick look with CPU-Z my Vcore is 1.152V and cpu is running at 3820Mhz idle with temps around 40'C and the room temp is 26'C (all my fans are running at 800-900 rpm too). just in case this all helps :)
 
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awartman

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Jun 24, 2013
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That sounds similar to what im getting, except my idle temps are a bit lower, but my voltage at idle goes down to about 0.6 with the negative offset. Keep an eye on your voltage if you run prime95. With everything on default for me my vcore showes 1.182 at idle and it goes up to 1.232 under load, which is what causes the 70 degree temps. I'm curious if yours goes that high too under load.
 
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GeekThief-1354135

GeekThief-1354135

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been runnign prime for about 10 min now and my Vcore is now at 1.232v, CPU is still running at 3.830Mhz and my seem to have maxed at 84'c on but averaging around 74'c (room temp now about 24'c)


PS i'm using cpuid HWMonitor for temps :)
 
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awartman

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Jun 24, 2013
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Sounds almost the exact same as mine. If your running your cpu at stock I would go into bios and change vcore to offset and use - 0.110 like me. Your prime temps should drop do about 60-65 instead of 80. 1.232 seems really high for no OC lol.
 
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GeekThief-1354135

GeekThief-1354135

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think i might have too these temps here higher than i thought they would be j
ust think i was going to leave to stock intel cooler on there at one point and not get the h100i untill later this year. very happy i got it all at the same time now :)
 
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