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VID + Offset = true vcore ?

post #1 of 3
Thread Starter 
I was wondering if my logic in the title is sound, for example if the vid reading in coretemp under full load was 1.200 and you set an offset off +0.100 in bios, would this technically give us the true vcore voltage off 1.300 ? and subtract the reading in cpu-z which would more than likely be around 1.280, would this give you an indication of vdroop?
The same with a minus offset, if you subtract the offset to the vid in coretemp, would this be true vcore ?
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post #2 of 3

Yep, the Offset either adds to or subtracts from the VID to give you your actual core voltage, but it's always before vDroop or vRise. So, it's easiest to find out what your idle voltage is first before switching to Offset mode so that you can find the difference between your idle voltage and the VID so that you have a better chance of ending up with the same voltage once you switch to Offset Mode. So for example, let's say that your idle voltage is 1.328V. This is 0.128V higher than the VID of 1.200V, so your offset would need to be either +0.1250V or +0.1300V. With whatever amount of vDroop or vRise you have, your voltage under load should end up being the same as it was before switching over.

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i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
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250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #3 of 3
Thread Starter 
Cool thanks was just checking and will help some others understand this more as its a much talked about debate, alongside what is the optimal safe max Vcore lol but with the last 6 and more generations, 1.36 seems to be a sweet spot although I did push my old 2500k to 1.46 for a good 2 years 24/7, I'm a bit sceptical of pushing ivy bridge over this because of the die size and new tri gate 3d thingy.
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