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Cannot reach max CPU overclock

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post #1 of 1 (permalink) Old 03-31-2019, 01:51 AM - Thread Starter
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Cannot reach max CPU overclock

See below for my rig.
I'm trying to squeeze some extra performance from my PC. I have a delidded 7900X running at 4.3ghz. With EIST enabled the PC maxes out at 4.01ghz under load (Eg x264 encoding)

With EIST disabled it will not exceed 3.57ghz.

I was encoding some media when I noticed my temps were under 50c. Normally I get temps in the mid 60s with CPU at 95%-100% running x264 2nd pass. So I checked task manager and saw that my CPU was maxing out at only 3.57ghz.

UPDATE: It turns out that when I set CPU to 4.3 it enables EIST. When I disable EIST it sets CPU back to 3.3ghz stock. Not on latest BIOS so will update that and see it it fixes the issue.

VCCIN: 1.792 | VCORE: 1.178 | Ring: 0.942 | CPU Uncore: Auto


CPU: I7-7900X @4.3GHZ | F4-3200C16Q-32GTZB DDR4 | MSI GTX 1080 Ti Duke | MSI X299 XPower Gaming AC Mobo
Drives: Boot W10 - 970 Pro 1tb | W7 - 960 Pro 1TB | Data1: Seagate 6TB NAS - Data2: 860 Pro 512gb | Netgear MS510TX switches
Cooler: Corsair H115i | Case: Thermaltake W100 | Optical: Pioneer BD-209DBK x 2, BW-16D1HTPRO | NIC: ASUS XG-C100C 10g
Cooling: Corsair Commander Pro x 2 | Case fans: 9 Notcua PWM | PSU: Corsair HX1200i | 100/40 FTTP Internet

Last edited by Tanyac; 03-31-2019 at 02:13 AM.
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