Monstieur
Superclocked Member
- Total Posts : 128
- Reward points : 0
- Joined: 2016/08/31 02:04:28
- Status: offline
- Ribbons : 5
I have an X299 Dark running the latest BIOS v1.21. The CPU is a 10900X running at 49x with an average of ~1.32 V per core. VCCIN is set to 1.9 V with VDroop enabled. I'm monitoring voltages with HWiNFO64. VCCIN usually droops to 1.875 V under load and does not trigger PMAX Limit / VCCIN Under-Voltage. CPU Package Power is ~375 W, CPU temperature is ~100 C, and VRM temperature is ~95 C. After several minutes of constant load, VCCIN suddenly drops to ~1.38 V and triggers PMAX Limit / VCCIN Under-Voltage. The PC randomly reboots at 100% load before I get a change to look at VCCIN. I tried disabling VDroop, but this just adds 50 mV under load. VCCIN still suddenly drops to ~1.38 V and the PC randomly reboots under load. Increasing VCCIN has no effect on the sudden voltage drops. Could the VRM be defective?
post edited by Monstieur - 2020/03/21 21:55:46
|
PINKTULIP
FTW Member
- Total Posts : 1158
- Reward points : 0
- Joined: 2007/06/03 16:01:19
- Location: EARTH
- Status: offline
- Ribbons : 7
Re: VCCIN Sudden Voltage Drop to 1.3 V Under Load and Random Reboots
2020/03/22 05:48:38
(permalink)
Monstieur
I have an X299 Dark running the latest BIOS v1.21.
The CPU is a 10900X running at 49x with an average of ~1.32 V per core.
VCCIN is set to 1.9 V with VDroop enabled.
I'm monitoring voltages with HWiNFO64.
VCCIN usually droops to 1.875 V under load and does not trigger PMAX Limit / VCCIN Under-Voltage.
CPU Package Power is ~375 W, CPU temperature is ~100 C, and VRM temperature is ~95 C.
After several minutes of constant load, VCCIN suddenly drops to ~1.38 V and triggers PMAX Limit / VCCIN Under-Voltage.
The PC randomly reboots at 100% load before I get a change to look at VCCIN.
I tried disabling VDroop, but this just adds 50 mV under load. VCCIN still suddenly drops to ~1.38 V and the PC randomly reboots under load. Increasing VCCIN has no effect on the sudden voltage drops.
Could the VRM be defective?
Can you reset BIOS and manually[Don't Load From Save Profile]re enter OC setting? Also try 48X bc Temp is out of control...
MOBO :EVGA X299 DARK 151-SX-E299-KR BIOS :1.29 CPU : Intel Core i9-10900X Skylake-X 10-Core 3.7 GHz LCR :Corsair Hydro Series H80i V2 GPU :SAPPHIRE NITRO+ RX 6900 XT SE MEMORY: CORSAIR Dominator Platinum SE Torque 32GB (4 x 8GB) CMD32GX4M4C3200C14T SSD 01: SAMSUNG 970 PRO M.2 1TB NVMe SSD 02: SAMSUNG 860 PRO 256GBX2 Raid 0 PSU : Seosonic Prime Titanium SSR-1000TR 1000 Watts CASE :Thermaltake (Armor+) VH6000SWA SC :Creative Sound Blaster AE-9 5.1 Channels Monitor Acer XR382CQK IPS 3840x1600 @ 75HZ BD [/
|
bob16314
Omnipotent Enthusiast
- Total Posts : 8048
- Reward points : 0
- Joined: 2008/11/07 22:33:22
- Location: Planet of the Babes
- Status: offline
- Ribbons : 761
Re: VCCIN Sudden Voltage Drop to 1.3 V Under Load and Random Reboots
2020/03/22 07:57:52
(permalink)
I'll just provide you with a little general info and links about OC'ing a 10900X in an EVGA X299. You should connect both 8-pin EPS (CPU power) Connectors for optimal performance/stability when using that (165-watt stock) processor and with a PSU able to deliver at least 20A on the +12V rail. Set CPU Vcore to Adaptive and Vcore Target Voltage to whatever is stable for your CPU OC (maybe 1.2V or so)..Adaptive Vcore is the way to go, it only applies extra Vcore when the CPU is running above default base frequency. Change the CPU TJMax value from Auto in the BIOS -> CPU Configuration menu to what the TJMax temperature is for that CPU, otherwise it will throw off all software reporting temps if it's not right..You can change the TJMax in many software programs too, make sure that's correct too. OC Guide for EVGA X299 DARK Motherboard (Voltage Tuning Functionality) Intel Core i9-10900X SpecsCPU-World Intel Core i9-10900X Specs Intel Performance Maximizer (Intel software OC'ing tool) Intel Processor Diagnostic Tool Good luck with it.
* Corsair Obsidian 450D Mid-Tower - Airflow Edition * ASUS ROG Maximus X Hero (Wi-Fi AC) * Intel i7-8700K @ 5.0 GHz * 16GB G.SKILL Trident Z 4133MHz * Sabrent Rocket 1TB M.2 SSD * WD Black 500 GB HDD * Seasonic M12 II 750W * Corsair H115i Elite Capellix 280mm * EVGA GTX 760 SC * Win7 Home/Win10 Home * "Whatever it takes, as long as it works" - Me
|
jasoncodispoti
SSC Member
- Total Posts : 628
- Reward points : 0
- Joined: 2013/03/18 14:40:28
- Location: Nashville, TN
- Status: offline
- Ribbons : 14
Re: VCCIN Sudden Voltage Drop to 1.3 V Under Load and Random Reboots
2020/03/22 09:33:58
(permalink)
Its getting hot in here so take off all of your clothes... sorry about that... lol.
Assuming those reported temps are correct (check your TJMax value in the BIOS) it would appear that your system is getting way to hot. While admittedly this MAY not be causing the issue you are describing here it is certainly an issue. Max temp for your CPU is 94C and VRM usually thermal throttles around 120C.
Intel Core i7-9800x | EVGA X299 Dark| EVGA RTX 2080ti FTW3 Ultra HydroCopper | 32GB Corsair Dominator Platinum | EKWB Liquid Cooled Loop | Phanteks Enthoo Primo SE | EVGA SuperNOVA 1000 P2 
|
Sajin
EVGA Forum Moderator
- Total Posts : 49167
- Reward points : 0
- Joined: 2010/06/07 21:11:51
- Location: Texas, USA.
- Status: online
- Ribbons : 199
Re: VCCIN Sudden Voltage Drop to 1.3 V Under Load and Random Reboots
2020/03/22 15:23:33
(permalink)
No problems at stock clocks?
|
Monstieur
Superclocked Member
- Total Posts : 128
- Reward points : 0
- Joined: 2016/08/31 02:04:28
- Status: offline
- Ribbons : 5
Re: VCCIN Sudden Voltage Drop to 1.3 V Under Load and Random Reboots
2020/03/22 23:31:34
(permalink)
Turned out I needed an additional +25 mV Uncore Offset. I tightened the memory from 4000C18 to 4000C16 which destabilized the core even though RAM Test was stable. The VCCIN drops also seem to have stopped. I'm not sure how it's related.
post edited by Monstieur - 2020/03/22 23:49:24
|
Monstieur
Superclocked Member
- Total Posts : 128
- Reward points : 0
- Joined: 2016/08/31 02:04:28
- Status: offline
- Ribbons : 5
Re: VCCIN Sudden Voltage Drop to 1.3 V Under Load and Random Reboots
2020/03/23 14:37:36
(permalink)
The VCCIN drops are still happening, though reboots are much less frequent. VCCIN drops to 1.38 V once in a while when a transition occurs from load to idle to load. E.g. when Prime95 is transitioning FFT sizes. I do have sufficient power from a Corsair RM1000x with both 8-pin connectors plugged in. The VRM is designed to handle an overclocked 10980XE at 5+ GHz. This should not be happening with a 10900X. The CPU temperature should not be relevant here. It throttles if it reaches 105 C as designed, but the VCCIN drops should not happen. The CPU is set to adaptive voltage and I've OCed just 3 cores to 50x with additional voltage and have underclocked the other 7 cores to 37x. VRM temperature is only 65 C with CPU package power of 240 W. Even with this "mild" load the VCCIN drops are still happening.
post edited by Monstieur - 2020/03/23 14:44:57
|
alesbal
New Member
- Total Posts : 3
- Reward points : 0
- Joined: 2020/05/11 03:55:16
- Status: offline
- Ribbons : 0
Re: VCCIN Sudden Voltage Drop to 1.3 V Under Load and Random Reboots
2020/05/11 03:57:39
(permalink)
Monstieur
Turned out I needed an additional +25 mV Uncore Offset. I tightened the memory from 4000C18 to 4000C16 which destabilized the core even though RAM Test was stable. The VCCIN drops also seem to have stopped. I'm not sure how it's related.
I have the same issue trying to stabile the RAM at 4000C18. What is your actual total Uncore offset and Uncore seen voltage under load?
|
Monstieur
Superclocked Member
- Total Posts : 128
- Reward points : 0
- Joined: 2016/08/31 02:04:28
- Status: offline
- Ribbons : 5
Re: VCCIN Sudden Voltage Drop to 1.3 V Under Load and Random Reboots
2020/05/11 13:12:14
(permalink)
alesbal
I have the same issue trying to stabile the RAM at 4000C18. What is your actual total Uncore offset and Uncore seen voltage under load?
VCCIN is still unstable as reported by the sensors. The system spontaneously reboots while stress testing. I don't have this issue on my MSI X299 Creation with the same CPU. I think the board is defective. My 10900X has a good IMC and does 4000C16 at +275 mV and 4000C18 at +250 mV. My first 9900X needed +450 mV for 4000C17 and my second 9900X needed +300 mV for 4000C17. I don't remember the total Uncore Offset voltage, but the base voltage should be the same for everyone and it's an Adaptive voltage by default as well.
post edited by Monstieur - 2020/05/11 13:16:44
|
alesbal
New Member
- Total Posts : 3
- Reward points : 0
- Joined: 2020/05/11 03:55:16
- Status: offline
- Ribbons : 0
Re: VCCIN Sudden Voltage Drop to 1.3 V Under Load and Random Reboots
2020/05/12 02:22:34
(permalink)
Are you able to check and and share with HWinfo the Uncore Voltage with 10900X? Ideally both idle and under stress.
|
Monstieur
Superclocked Member
- Total Posts : 128
- Reward points : 0
- Joined: 2016/08/31 02:04:28
- Status: offline
- Ribbons : 5
Re: VCCIN Sudden Voltage Drop to 1.3 V Under Load and Random Reboots
2020/05/12 15:47:46
(permalink)
alesbal
Are you able to check and and share with HWinfo the Uncore Voltage with 10900X? Ideally both idle and under stress.
It's not reported. I can only see the offset in HWiNFO.
|
alesbal
New Member
- Total Posts : 3
- Reward points : 0
- Joined: 2020/05/11 03:55:16
- Status: offline
- Ribbons : 0
Re: VCCIN Sudden Voltage Drop to 1.3 V Under Load and Random Reboots
2020/05/12 15:57:53
(permalink)
That's strange :)
Maybe it's reported as VINx but should be there...Anyway I had a similar issue and I solved increasing the Uncore voltage offset to +0.512 (now total Uncore is 1.416v under heavy lead, 1.424v idle).
This has made my system stable (with RAM4000C18 cache 24x, with RAM3800C15 I can lower Uncore to +0.450 and rise cahce to 30x). Consider that for a reliable test you should never run over 94°C and never hit thermal throttling (or somthing like < 1% of TT hit with Real Bench or something similar very hard). As soon as you overtake 94°C (TJmax for i9-10900x) the system destabilize anyway, also you are not getting any further speed, you are just making CPU cycles lost in throttling instead of computation.
|
Monstieur
Superclocked Member
- Total Posts : 128
- Reward points : 0
- Joined: 2016/08/31 02:04:28
- Status: offline
- Ribbons : 5
Re: VCCIN Sudden Voltage Drop to 1.3 V Under Load and Random Reboots
2020/05/12 16:00:18
(permalink)
I tested at +450 mV Uncore but it didn't help with the spontaneous reboots. Like I said my MSI X299 board is stable with +250 mV Uncore. Something is going wrong and the my X299 Dark is unable to sustain 375 W on the CPU. Even with throttling it should not reboot.
|