Question Overclocking memory causing CPU instability

Jan 6, 2021
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Processor

Processor Manufacturer:Advanced Micro Devices, Inc.
Processor Version:AMD Ryzen 5 3600 6-Core Processor
External Clock:100 MHz
Maximum Clock Supported:4200 MHz
Current Clock:3600 MHz
CPU Socket:Populated
CPU Status:Enabled
Processor Type:Central Processor
Processor Voltage:1.1 V
Processor Upgrade:Socket AM4
Socket Designation:AM4
Motherboard

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[Computer]
Computer Brand Name:Unknown on Noname
[Motherboard]
Motherboard Model:ASRock B450 Gaming-ITX/ac
Motherboard Chipset:AMD B450 (Low-Power Promontory PROM26.A)
Motherboard Slots:6xPCI Express x1, 1xPCI Express x4, 1xPCI Express x8, 1xPCI Express x16
PCI Express Version Supported:v3.0
USB Version Supported:v3.1
[BIOS]
BIOS Manufacturer:American Megatrends
BIOS Date:11/06/2020
BIOS Version:P4.20
UEFI BIOS:Capable
Super-IO/LPC Chip:Winbond/Nuvoton NCT6792D
Ram
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[General Module Information]
Module Number:0
Module Size:8 GBytes
Memory Type:DDR4 SDRAM
Module Type:Unbuffered DIMM (UDIMM)
Memory Speed:1333.3 MHz (DDR4-2666 / PC4-21300)
Module Manufacturer:Crucial Technology
Module Part Number:BL8G36C16U4R.M8FE1
Module Revision:0.0
Module Serial Number:2797559779
Module Manufacturing Date:Year: 2020, Week: 22
Module Manufacturing Location:0
SDRAM Manufacturer:Micron Tech.
DRAM Steppping:0.0
Error Check/Correction:None
[Module Characteristics]
Row Address Bits:16
Column Address Bits:10
Module Density:8192 Mb
Number Of Ranks:1
Device Width:8 bits
Bus Width:64 bits
Die Count:1
Module Nominal Voltage (VDD):1.2 V
Minimum SDRAM Cycle Time (tCKAVGmin):0.75000 ns
Maximum SDRAM Cycle Time (tCKAVGmax):1.60000 ns
CAS# Latencies Supported:10, 12, 13, 14, 15, 16, 17, 18, 19, 20
Minimum CAS# Latency Time (tAAmin):14.250 ns
Minimum RAS# to CAS# Delay (tRCDmin):14.250 ns
Minimum Row Precharge Time (tRPmin):14.250 ns
Minimum Active to Precharge Time (tRASmin):32.000 ns
Supported Module Timing at 1333.3 MHz:19-19-19-43
Supported Module Timing at 1200.0 MHz:18-18-18-39
Supported Module Timing at 1066.7 MHz:16-16-16-35
Supported Module Timing at 933.3 MHz:14-14-14-30
Supported Module Timing at 800.0 MHz:12-12-12-26
Supported Module Timing at 666.7 MHz:10-10-10-22
Minimum Active to Active/Refresh Time (tRCmin):46.250 ns
Minimum Refresh Recovery Time Delay (tRFC1min):350.000 ns
Minimum Refresh Recovery Time Delay (tRFC2min):260.000 ns
Minimum Refresh Recovery Time Delay (tRFC4min):160.000 ns
Minimum Four Activate Window Delay Time (tFAWmin):21.000 ns
Minimum Active to Active Delay Time - Different Bank Group (tRRD_Smin):2.925 ns
Minimum Active to Active Delay Time - Same Bank Group (tRRD_Lmin):4.900 ns
Minimum CAS to CAS Delay Time - Same Bank Group (tCCD_Lmin):5.000 ns
[Features]
Module Temperature Sensor (TSOD):Not Supported
Module Nominal Height:31 - 32 mm
Module Maximum Thickness (Front):1 - 2 mm
Module Maximum Thickness (Back):1 - 2 mm
Address Mapping from Edge Connector to DRAM:Standard
[Intel Extreme Memory Profile (XMP)]
XMP Revision:2.0
[Certified Profile [Enabled]]
Module VDD Voltage Level:1.35 V
Minimum SDRAM Cycle Time (tCKAVGmin):0.55500 ns
CAS# Latencies Supported:7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Minimum CAS# Latency Time (tAAmin):8.750 ns
Minimum RAS# to CAS# Delay (tRCDmin):9.875 ns
Minimum Row Precharge Time (tRPmin):9.875 ns
Minimum Active to Precharge Time (tRASmin):21.000 ns
Supported Module Timing at 1800.0 MHz:16-18-18-38
Supported Module Timing at 1733.3 MHz:16-18-18-37
Supported Module Timing at 1666.7 MHz:15-17-17-35
Supported Module Timing at 1600.0 MHz:14-16-16-34
Supported Module Timing at 1466.7 MHz:13-15-15-31
Supported Module Timing at 1333.3 MHz:12-14-14-28
Supported Module Timing at 1200.0 MHz:11-12-12-26
Supported Module Timing at 1066.7 MHz:10-11-11-23
Supported Module Timing at 933.3 MHz:9-10-10-20
Supported Module Timing at 800.0 MHz:7-8-8-17
Minimum Active to Active/Refresh Time (tRCmin):32.000 ns
Minimum Refresh Recovery Time Delay (tRFC1min):350.000 ns
Minimum Refresh Recovery Time Delay (tRFC2min):260.000 ns
Minimum Refresh Recovery Time Delay (tRFC4min):160.000 ns
Minimum Four Activate Window Delay Time (tFAWmin):21.000 ns
Minimum Active to Active Delay Time - Different Bank Group (tRRD_Smin):3.000 ns
Minimum Active to Active Delay Time - Same Bank Group (tRRD_Lmin):4.875 ns
Memory

[General information]
Total Memory Size:16 GBytes
Total Memory Size [MB]:16384
[Current Performance Settings]
Maximum Supported Memory Clock:Unlimited
Current Memory Clock:1766.6 MHz
Current Timing (tCAS-tRCD-tRP-tRAS):16-19-19-34
Memory Channels Supported:2
Memory Channels Active:2
Command Rate:1T
Read to Read Delay (tRD_RD) Same Rank:5T
Read to Read Delay (tRD_RD) Different DIMM:4T
Write to Write Delay (tWR_WR) Same Rank:5T
Write to Write Delay (tWR_WR) Different DIMM:6T
Read to Precharge Delay (tRTP):14T
Write to Precharge Delay (tWTP):37T
Write Recovery Time (tWR):26T
Row Cycle Time (tRC):56T
Refresh Cycle Time (tRFC):619T
Four Activate Window (tFAW):38T
PSU: Corsair TX650

GPU: NVIDIA GeForce RTX 2060

Having bought 3600 MHz ram I wanted to get them to run at that speed instead of the default 2600 MHz. After a lot of troubleshooting back and forth I have settled on 3533 MHz, by activating the XMP profile for 3600 MHz in the bios and then adjusting frequency back one step to 1766 MHz. I also improved primary timings using Dram calculator, but so far I have left secondary timings at the 3600 MHz XMP default.

This stuff all took a while to even get the computer to post!

I ran MemTest and it didn't give me any errors, so I thought it was happy days from there.....

But now the computer restarts when under heavy CPU-load. This makes no sense to me as I haven't touched anything CPU related. I tried to run prime95 and it will cause the computer to restart within 5-7 minutes(HWinfo log of this if anyone is interested). If I go back to 2600 MHz everything runs fine.
Looking at event viewer there is a critical event id 41 "kernel power" event but it seems like a generic critical error that won't tell me what's wrong.

So basically I don't know how to fix this.
Should I increase voltage to the CPU? Or is my PSU not capable enough?
Am I missing some obvious tweak that will fix everything?
 
Processor

Processor Manufacturer:Advanced Micro Devices, Inc.
Processor Version:AMD Ryzen 5 3600 6-Core Processor
External Clock:100 MHz
Maximum Clock Supported:4200 MHz
Current Clock:3600 MHz
CPU Socket:Populated
CPU Status:Enabled
Processor Type:Central Processor
Processor Voltage:1.1 V
Processor Upgrade:Socket AM4
Socket Designation:AM4
Motherboard

���
[Computer]
Computer Brand Name:Unknown on Noname
[Motherboard]
Motherboard Model:ASRock B450 Gaming-ITX/ac
Motherboard Chipset:AMD B450 (Low-Power Promontory PROM26.A)
Motherboard Slots:6xPCI Express x1, 1xPCI Express x4, 1xPCI Express x8, 1xPCI Express x16
PCI Express Version Supported:v3.0
USB Version Supported:v3.1
[BIOS]
BIOS Manufacturer:American Megatrends
BIOS Date:11/06/2020
BIOS Version:P4.20
UEFI BIOS:Capable
Super-IO/LPC Chip:Winbond/Nuvoton NCT6792D
Ram
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[General Module Information]
Module Number:0
Module Size:8 GBytes
Memory Type:DDR4 SDRAM
Module Type:Unbuffered DIMM (UDIMM)
Memory Speed:1333.3 MHz (DDR4-2666 / PC4-21300)
Module Manufacturer:Crucial Technology
Module Part Number:BL8G36C16U4R.M8FE1
Module Revision:0.0
Module Serial Number:2797559779
Module Manufacturing Date:Year: 2020, Week: 22
Module Manufacturing Location:0
SDRAM Manufacturer:Micron Tech.
DRAM Steppping:0.0
Error Check/Correction:None
[Module Characteristics]
Row Address Bits:16
Column Address Bits:10
Module Density:8192 Mb
Number Of Ranks:1
Device Width:8 bits
Bus Width:64 bits
Die Count:1
Module Nominal Voltage (VDD):1.2 V
Minimum SDRAM Cycle Time (tCKAVGmin):0.75000 ns
Maximum SDRAM Cycle Time (tCKAVGmax):1.60000 ns
CAS# Latencies Supported:10, 12, 13, 14, 15, 16, 17, 18, 19, 20
Minimum CAS# Latency Time (tAAmin):14.250 ns
Minimum RAS# to CAS# Delay (tRCDmin):14.250 ns
Minimum Row Precharge Time (tRPmin):14.250 ns
Minimum Active to Precharge Time (tRASmin):32.000 ns
Supported Module Timing at 1333.3 MHz:19-19-19-43
Supported Module Timing at 1200.0 MHz:18-18-18-39
Supported Module Timing at 1066.7 MHz:16-16-16-35
Supported Module Timing at 933.3 MHz:14-14-14-30
Supported Module Timing at 800.0 MHz:12-12-12-26
Supported Module Timing at 666.7 MHz:10-10-10-22
Minimum Active to Active/Refresh Time (tRCmin):46.250 ns
Minimum Refresh Recovery Time Delay (tRFC1min):350.000 ns
Minimum Refresh Recovery Time Delay (tRFC2min):260.000 ns
Minimum Refresh Recovery Time Delay (tRFC4min):160.000 ns
Minimum Four Activate Window Delay Time (tFAWmin):21.000 ns
Minimum Active to Active Delay Time - Different Bank Group (tRRD_Smin):2.925 ns
Minimum Active to Active Delay Time - Same Bank Group (tRRD_Lmin):4.900 ns
Minimum CAS to CAS Delay Time - Same Bank Group (tCCD_Lmin):5.000 ns
[Features]
Module Temperature Sensor (TSOD):Not Supported
Module Nominal Height:31 - 32 mm
Module Maximum Thickness (Front):1 - 2 mm
Module Maximum Thickness (Back):1 - 2 mm
Address Mapping from Edge Connector to DRAM:Standard
[Intel Extreme Memory Profile (XMP)]
XMP Revision:2.0
[Certified Profile [Enabled]]
Module VDD Voltage Level:1.35 V
Minimum SDRAM Cycle Time (tCKAVGmin):0.55500 ns
CAS# Latencies Supported:7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Minimum CAS# Latency Time (tAAmin):8.750 ns
Minimum RAS# to CAS# Delay (tRCDmin):9.875 ns
Minimum Row Precharge Time (tRPmin):9.875 ns
Minimum Active to Precharge Time (tRASmin):21.000 ns
Supported Module Timing at 1800.0 MHz:16-18-18-38
Supported Module Timing at 1733.3 MHz:16-18-18-37
Supported Module Timing at 1666.7 MHz:15-17-17-35
Supported Module Timing at 1600.0 MHz:14-16-16-34
Supported Module Timing at 1466.7 MHz:13-15-15-31
Supported Module Timing at 1333.3 MHz:12-14-14-28
Supported Module Timing at 1200.0 MHz:11-12-12-26
Supported Module Timing at 1066.7 MHz:10-11-11-23
Supported Module Timing at 933.3 MHz:9-10-10-20
Supported Module Timing at 800.0 MHz:7-8-8-17
Minimum Active to Active/Refresh Time (tRCmin):32.000 ns
Minimum Refresh Recovery Time Delay (tRFC1min):350.000 ns
Minimum Refresh Recovery Time Delay (tRFC2min):260.000 ns
Minimum Refresh Recovery Time Delay (tRFC4min):160.000 ns
Minimum Four Activate Window Delay Time (tFAWmin):21.000 ns
Minimum Active to Active Delay Time - Different Bank Group (tRRD_Smin):3.000 ns
Minimum Active to Active Delay Time - Same Bank Group (tRRD_Lmin):4.875 ns
Memory

[General information]
Total Memory Size:16 GBytes
Total Memory Size [MB]:16384
[Current Performance Settings]
Maximum Supported Memory Clock:Unlimited
Current Memory Clock:1766.6 MHz
Current Timing (tCAS-tRCD-tRP-tRAS):16-19-19-34
Memory Channels Supported:2
Memory Channels Active:2
Command Rate:1T
Read to Read Delay (tRD_RD) Same Rank:5T
Read to Read Delay (tRD_RD) Different DIMM:4T
Write to Write Delay (tWR_WR) Same Rank:5T
Write to Write Delay (tWR_WR) Different DIMM:6T
Read to Precharge Delay (tRTP):14T
Write to Precharge Delay (tWTP):37T
Write Recovery Time (tWR):26T
Row Cycle Time (tRC):56T
Refresh Cycle Time (tRFC):619T
Four Activate Window (tFAW):38T
PSU: Corsair TX650

GPU: NVIDIA GeForce RTX 2060

Having bought 3600 MHz ram I wanted to get them to run at that speed instead of the default 2600 MHz. After a lot of troubleshooting back and forth I have settled on 3533 MHz, by activating the XMP profile for 3600 MHz in the bios and then adjusting frequency back one step to 1766 MHz. I also improved primary timings using Dram calculator, but so far I have left secondary timings at the 3600 MHz XMP default.

This stuff all took a while to even get the computer to post!

I ran MemTest and it didn't give me any errors, so I thought it was happy days from there.....

But now the computer restarts when under heavy CPU-load. This makes no sense to me as I haven't touched anything CPU related. I tried to run prime95 and it will cause the computer to restart within 5-7 minutes(HWinfo log of this if anyone is interested). If I go back to 2600 MHz everything runs fine.
Looking at event viewer there is a critical event id 41 "kernel power" event but it seems like a generic critical error that won't tell me what's wrong.

So basically I don't know how to fix this.
Should I increase voltage to the CPU? Or is my PSU not capable enough?
Am I missing some obvious tweak that will fix everything?
Did you try with higher voltage for RAM ? I'm sure that PSU has nothing to do with it, RAMs use very little power. Another thing, location for RAM controller is in the CPU so you are "touching"it.
 

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