Cannot boot with XMP enabled

[ra5040]

I am having a problem with XMP on a Prime Z270-A motherboard. I have the following hardware:

Motherboard: Prime Z279-A
CPU: Intel i7 7700K
VIDEO: NVIDIA QUADRO K1200
RAM: G-Skill F4-3200C16D-32GVK
PSU: Corsair HX750i
Cooling: NZXT Kraken X62

The following settings are with XMP off. I have tested the system using various stress tests (ROG Realbench, AIDA64, Prime95) and it is stable at good temperatures.

WITH XMP OFF
AI Overclock Tuner: Manual
BCLK Frequency: 100.000
ASUS Multicore Enhancement: Auto
AVX Instruction Core Ratio Negative Offset: 0
CPU Core Ratio: Sync All Cores
1-Core Ratio Limit: 48
…
BCLK Frequency: DRAM Frequency Ratio: Auto
DRAM Odd Ratio Mode: Enabled
DRAM Frequency: Auto
TPU: Keep Current Settings
EPU Power Saving Mode: Disabled
CPU SVID Support: Auto
DRAM Timing Control: All defaults
External Digi+ Power Control: All defaults
Internal CPU Power Management: Defaults
IA AC Load Line: 0.01
IA DC Load Line: 0.01
CPU Core/Cache Current Limit Max.: Auto
Min. CPU Cache Ratio: Auto
Max CPU Cache Ratio: Auto
BCLK Aware Adaptive Voltage: Auto
CPU Core/Cache Voltage: Adaptive Mode
- Offset Mode Sign: +
- Additional Turbo Mode CPU Core Voltage 1.320
- Offset Voltage: Auto
CPU Overclocking temperature control: Disabled
DRAM Voltage: Auto
CPU VCCIO Voltage: Auto
CPU System Agent Voltage: Auto
PCH Core Voltage: Auto
CPU Standby Voltage: Auto
DRAM REF Voltage Control: All Auto

I then turned on XMP with the same settings, except for the XMP settings:

WITH XMP ON
AI Overclock Tuner: XMP
XMP: XMP DDR4-3200 16-18-18-18-38-1.35V
BCLK Frequency: 100.000
ASUS Multicore Enhancement: Auto
AVX Instruction Core Ratio Negative Offset: 0
CPU Core Ratio: Sync All Cores
1-Core Ratio Limit: 48
…
BCLK Frequency: DRAM Frequency Ratio: Auto
DRAM Odd Ratio Mode: Enabled
DRAM Frequency: DDR4-3200MHz
TPU: Keep Current Settings
EPU Power Saving Mode: Disabled
CPU SVID Support: Auto
DRAM Timing Control: Defaults
DRAM CAS Latency: 16
DRAM RAS to CAS Delay: 18
DRAM RAS ACT Time: 38
External Digi+ Power Control: All defaults
Internal CPU Power Management: Defaults
IA AC Load Line: 0.01
IA DC Load Line: 0.01
CPU Core/Cache Current Limit Max.: Auto
Min. CPU Cache Ratio: Auto
Max CPU Cache Ratio: Auto
BCLK Aware Adaptive Voltage: Auto
CPU Core/Cache Voltage: Adaptive Mode
- Offset Mode Sign: +
- Additional Turbo Mode CPU Core Voltage 1.320
- Offset Voltage: Auto
CPU Overclocking temperature control: Disabled
DRAM Voltage: 1.3530
CPU VCCIO Voltage: Auto
CPU System Agent Voltage: Auto
PCH Core Voltage: Auto
CPU Standby Voltage: Auto
DRAM REF Voltage Control: All Auto

When I Save/Reset the system hangs with a blank screen. The motherboard LEDs show no error.

I have also tested the system with G-Skill F4-3200C14D-32GVR memories with exactly the same result, so the problem is not with the memories.

I have the DIMMS in slots 2 and 4.

I would appreciate some help

Thanks

Robert

[ra5040]

siopoudis wrote:
I'm afraid that's not the case. Simply enabling XMP on default bios settings locks my 7700K to 800MHz. Same if I setup the profile manually. No overclock or any other setting touched. Reverting back to 0801 works fine.

Z270G/i7 7700K/G.Skill 32GB (4x8) Trident-Z RGB 3466Mhz-16-18-38 1.35v

That sounds as though the current or power is being limited. It would be worth checking the settings before downgrading ... or doing a CMOS reset.

[Zka17]

siopoudis wrote:
Simply enabling XMP on default bios settings locks my 7700K to 800MHz

What do you mean by that ^^^? Can not manually raise the CPU frequency in BIOS?
Have you checked CPU-Z while in OS? What that shows for the CPU speed during idle and during load?

[siopoudis]

Zka17 wrote:
What do you mean by that ^^^? Can not manually raise the CPU frequency in BIOS?
Have you checked CPU-Z while in OS? What that shows for the CPU speed during idle and during load?

After clearing the CMOS, the CPU is set to 4.2GHz/4.5GHz boost. In windows everything works ok.
Went back into the BIOS and simply enabled the XMP profile. Nothing else changed, everything else is set to AUTO. Restart, back into BIOS, CPU shows 800MHz (it would normally show 4.2GHz). In windows, CPU-Z shows 800MHz (8x100), HWInfo the same. Load is stuck at 100%, and the system is horribly slow.
Isn't it supposed to change states and speed up depending on load? It doesn't.
Double-checked all settings in the BIOS, everything is at default values, except for the XMP profile (DRAM speed, and timings). Speedstep is enabled.
If I switch the XMP profile back to automatic, it works ok again. Setting the same settings for the XMP profile (3466-16-18-38 - 1.35v) in Manual mode, I get the same issue. CPU gets stuck at 800MHz!

I reverted back to 0801 and everything works fine.

[Tetsujin]

Hello,

CPU: İ5 8400,
Motherboard: Prime Z370-P (bios latest version 1410),
Video: Msi GTX 1060 6G,
Ram: Kingston 16GB (2x8GB) HyperX Predator Black DDR4 3000MHz CL15 1.35V (HX430C15PB3K2/16),
SSD: Samsung 970 Evo 256 GB,
HDD: Seagate 1TB 7200,
PSU: Thermaltake LitePower 600W PSU,
Windows 10.

Pc won’t boot with XMP enabled. I am having a problem with XMP on a Prime Z370-P motherboard.

I have the DIMMS in slots 2 and 4.
-Bios-XMP profile 2 select (2666 Mhz). no problem.
-Bios-XMP profile 1 select (3000 Mhz CL15-17-17 @1.35V). Pc does not boot , blinking cursor at top left corner, staying on black screen.

thank you for your help in advance...

[I_G_SYME]

siopoudis wrote:
I'm afraid that's not the case. Simply enabling XMP on default bios settings locks my 7700K to 800MHz. Same if I setup the profile manually. No overclock or any other setting touched. Reverting back to 0801 works fine.

Z270G/i7 7700K/G.Skill 32GB (4x8) Trident-Z RGB 3466Mhz-16-18-38 1.35v

Check out the problems other people have had with 0906 BIOS and you will find it is as flaky as hell. There is another thread somewhere on this forum with all sorts of tales of woe. Suggest you wind back to previous version and wait for more stable BIOS version to come along. I had issues with XMP profile on my Z270G with version 0906 and simply re-installed 0801 to bring things back to life.

[JustinThyme]

Not uncommon.
First check that your dram is on the QVL list for your board.

Its 50/50 that the XMP profile will work with chances being higher on high end gear.
Its also not uncommon for the CPU and memory timings to not play well together and it take a little tweaking on your part. if 2666 works thats a starting point. Check the CL there.
Also check your dram voltage and give it a bump if necessary.

[HiVizMan]

It is really all about the memory being compatible with the chipset and how good the CPU IMC is.

Some folks win the frequency silicone lottery and others get great memory controllers. The perfect CPU has both.