After some testing with my system i noticed that with my i5 4670k i am not getting my configured speed.

the processor is default 3.4Ghz with 3.8Ghz Boost, i have been stable at 4.6Ghz for years on windows.

 

however my CPUInfo shows 3.4 Only.

 

cat /proc/cpuinfo | grep -i mhz
cpu MHz         : 3400.000
cpu MHz         : 3396.679
cpu MHz         : 3398.754
cpu MHz         : 3400.000

 

Following some instructions on here i turned on Performance in the Tips and Tricks plugin.

That seem to do the trick with the clock speeds going up to 4.6Ghz.

 

But then the system won't boot i get the error  "Kernel panic - not syncing: Timeout: Not all cpus entered broadcast exception handler"

Which is apparently to do with having Intel Speed Step on, so when i turn that off i am back to the start i have 3.4Ghz again even with Performance on in Tips and Tricks.

 

Anyone know how i can have my cake and eat it too? 

 

 

Processor

Title	Information
Processor Information
Socket Designation:	SOCKET 0
Type:	Central
Family:	Core i5
Manufacturer:	Intel
ID:	C3 06 03 00 FF FB EB BF
Signature:	Type 0, Family 6, Model 60, Stepping 3
Flags:	FPU (Floating-point unit on-chip)
	VME (Virtual mode extension)
	DE (Debugging extension)
	PSE (Page size extension)
	TSC (Time stamp counter)
	MSR (Model specific registers)
	PAE (Physical address extension)
	MCE (Machine check exception)
	CX8 (CMPXCHG8 instruction supported)
	APIC (On-chip APIC hardware supported)
	SEP (Fast system call)
	MTRR (Memory type range registers)
	PGE (Page global enable)
	MCA (Machine check architecture)
	CMOV (Conditional move instruction supported)
	PAT (Page attribute table)
	PSE-36 (36-bit page size extension)
	CLFSH (CLFLUSH instruction supported)
	DS (Debug store)
	ACPI (ACPI supported)
	MMX (MMX technology supported)
	FXSR (FXSAVE and FXSTOR instructions supported)
	SSE (Streaming SIMD extensions)
	SSE2 (Streaming SIMD extensions 2)
	SS (Self-snoop)
	HTT (Multi-threading)
	TM (Thermal monitor supported)
	PBE (Pending break enabled)
Version:	Intel® Core™ i5-4670K CPU @ 3.40GHz
Voltage:	1.2 V
External Clock:	100 MHz
Max Speed:	3800 MHz
Current Speed:	3400 MHz
Status:	Populated, Enabled
Upgrade:	Socket BGA1155
Serial Number:	Not Specified
Asset Tag:	Fill By OEM
Part Number:	Fill By OEM
Core Count:	4
Core Enabled:	4
Thread Count:	4
Characteristics:	64-bit capable

 

 

Hi  Maticks

I am facing similar issues.

How did you solve this problem ?

 

Thanks

Pranjal