Core Voltage for i7 4790k
Core Voltage for i7 4790k
Hello, I haven't updated since I installed my core 2 quad Q6600. I'm still getting familiar with these voltage settings. I'm using a Z97 PC from MSI and trying to achieve a very mild OC around 4.5GHz. I've been stable at 1.9 volts but have dropped to 1.8V, which is confusing because others seem to manage it at lower voltages. On HWmonitor it reads 1.189V, while in AIDA64 it shows 1.208V—why the difference? I don't see any auto-voltage settings on the board in the BIOS, and I noticed my Cinebench slows down when I lower the voltage.
0.85V SA and 1.02V VCCIO works well, matching expectations for Haswell/refresh.
Your CPU cache voltage is set to Auto, which is slightly high at 1.28V; you might match your CPU’s 1.20V setting.
If possible, adjust the CPU cache ratio to around 40x or 4.0Ghz and test stress performance.
coilcarnage142 :
larrycumming :
4.5Ghz @ 1.2V works nicely for i7-4970k on Haswell-refresh.
My J-serial i7-5820k runs at 4.4Ghz @1.2V and 4.6Ghz @1.25V (Haswell-E 6C/12T), stable under stress.
FIVR voltage should sit between 1.85-1.9V at these settings.
Be sure to manually configure VCCIO and System Agent voltages, as they often overshoot when left auto.
What voltage range is suitable for VCCIO and System Agent around...
4.5Ghz @ 1.2V works excellently with the Haswell-refresh i7-4970k. My J-serial i7-5820k operates at 4.4Ghz @1.2V and 4.6Ghz @1.25V (Haswell-E 6C/12T), showing stable performance under stress. The FIVR voltage should sit around 1.85-1.9V at these settings. Be sure to manually adjust VCCIO and System Agent voltages, as they often overshoot when left in auto mode.
4.5Ghz @ 1.2V works well with the Haswell-refresh i7-4970k. My J-serial i7-5820k handles 4.4Ghz @1.2V and 4.6Ghz @1.25V (Haswell-e 6C/12T) under stress testing, remaining stable. The FIVR voltage should sit around 1.85-1.9V at these settings. Be sure to manually adjust VCCIO and System Agent voltages—they often overshoot when left on auto.
I’m wondering what voltage is suitable for VCCIO and System Agent when I’m using a 4.5Ghz configuration, especially since I’m still getting used to older chips from the 775 series.
Thanks ahead if you can help a bit more.
UPDATE: Here’s a screenshot of my BIOS settings. Not sure if it’s good for IO voltages or if I should stick to manual mode and let auto handle it, just like I did here. I only set what was closest to the auto values just to be safe now.
http://www.mediafire.com/view/5i3qy4kiin...apShot.bmp
The Paladin suggests aiming for 4.7 @ 1.28-1.29v, but advises staying under 1.3v to maintain the 4790K performance for longer. Above 4.6 you'll notice a rapid increase in temperatures—watch closely. Thank you for the assistance; I still have issues with the Larry mentioned regarding IO voltages. Could you confirm if those voltages are acceptable?
http://www.mediafire.com/view/5i3qy4kiin...apShot.bmp
The 0.85V SA and 1.02V VCCIO are acceptable, aligning well with the expected performance from Haswell/Haswell-refresh. The CPU cache voltage is currently set to Auto, which is slightly high at 1.28V; adjusting it to match your CPU's 1.20V would be better. If possible, configure the cache ratio to around 40x or 4.0Ghz and verify stability through stress tests. coilcarnage142 shared their experience with a 4.5Ghz chip running at 1.2V for the i7-4970K, achieving stable performance at 4.4Ghz and 4.6Ghz at 1.25V. They recommend setting VCCIO and System Agent voltages manually to avoid overshoots when auto is enabled. For your current setup (4.5Ghz), the ideal range for VCCIO and System Agent isn’t specified, but they suggest sticking to manual settings unless you’re confident in auto handling. A screenshot of your BIOS settings was shared for reference.
Larrycumming shared his experience with the voltage settings. He mentioned that 0.85V SA and 1.02V VCCIO works well, aligning with expectations for Haswell/Haswell-refresh. The CPU cache voltage should be set to auto mode, but if possible, adjust it to around 40x or 4.0Ghz and test stress tests. Coilcarnage142 recommended 4.5Ghz at 1.2V for the i7-4970k, while his J-serial i7-5820k runs stable at 4.4Ghz at 1.2V and 4.6Ghz at 1.25V. He advised manually setting VCCIO and System Agent voltages to avoid overshoots. He also shared a screenshot of his BIOS settings and expressed gratitude for the guidance, noting he only adjusted to match auto settings initially.
Technically it's possible to go up to 1.32v in Devils Canyon, but you should cap it at 1.3v for better longevity.
the issue is that resetting the BIOS and enabling auto turbo will yield a 44 multiplier on a 4790K... this is the chip's natural speed and doesn't require any changes to the BIOS voltage settings to reach it. 4.5-4.9 would be considered overclocking.