xeon 1650v3 overclocking not working

[krusaderr]

im trying to overclock my xeon 1650v3 when it change the freqeucny of turbo boost it dosent apply fully im using a dell t5810


i tried setting turbo to 45 and it still didnt work

i have tried putting it to sleep then waking as it worked on windows but nothing seems to happen here.
thanks.

[cyring]

Hello,

Go to gasseluk/v3turbo and we learn it requires particular programming (MSR_OC_MAILBOX) not implemented in CoreFreq; although turbo ratio can be override, is not sufficient for that Xeon hack

[krusaderr]

how do install it i cant get through setting up gnu-efi
i am unable to link it and compile main.c

[cyring]

I'm also encountered an objcopy issue to finalize the build

I have been wondering why it has to land into UEFI ?
Because this Xeon hack is said to work before a microcode changes and locks things in kernel space where CoreFreq is running
See:
https://github.com/gasseluk/v3turbo/blob/f88b4c7d5b3d293016f1a8467ae0fec1538d06f8/v3.c#L212

[cyring]

Let's try manually

---

To prevent microcode from being loaded into your Xeon processor during Linux boot, you have 3 options:

1. Add the following kernel parameter to your bootloader configuration: dis_ucode_ldr
2. Remove any package which provides intel-microcode in your distribution and make sure your initramfs is rebuilt w/o it
3. Blacklist Microcode Module in one /etc/modprobe.d/blacklist-microcode.conf with instruction: blacklist microcode
   Next rebuild your initramfs

Reboot and check in your kernel log:

dmesg | grep microcode
cat /proc/cpuinfo | grep microcode

As listed in v3turbo EFI driver, we can verify prerequisites using the msr-tools (you have to install that package if not done yet) then as root you execute and print the results of these registers

#define        MSR_IA32_BIOS_SIGN_ID      0x08B
#define        MSR_PLATFORM_INFO          0x0CE
#define        MSR_OC_MAILBOX             0x150
#define        MSR_FLEX_RATIO             0x194
#define        MSR_TURBO_RATIO_LIMIT      0x1AD
#define        MSR_TURBO_RATIO_LIMIT1     0x1AE
#define        MSR_TURBO_RATIO_LIMIT2     0x1AF
#define        MSR_TURBO_POWER_LIMIT      0x610  
#define        MSR_UNCORE_RATIO_LIMIT     0x620

# MSR_IA32_BIOS_SIGN_ID
rdmsr -ax 0x08B

# MSR_FLEX_RATIO 
rdmsr -ax 0x194

# MSR_TURBO_RATIO_LIMIT1
rdmsr -ax 0x1AE

# MSR_TURBO_RATIO_LIMIT2
rdmsr -ax 0x1AF

# MSR_TURBO_POWER_LIMIT
rdmsr -ax 0x610

---

CyrIng
(edited w/ smartphone)

[cyring]

But what the sequence wrmsr -a 0x08B 0x0; cpuid 0; rdmsr -ax 0x08B says ?
If it is still not returning zero on all CPUs then it's a no go for overclocking

[krusaderr]

im getting zeros on some cpus

[krusaderr]

got it down to 2 non zero cpus

thanks

edit

i got it down to 11 zeros but i cant get rid of the one non zero bit

[cyring]

I believe this sequence in command mode is not low level enough and should be executed in a kernel module using assembly instructions.

Meanwhile if you believe you have correctly prevent microcode from loading at Linux boot then below should confirm it

dmesg | grep microcode
cat /proc/cpuinfo | grep microcode

If there is still a microcode then your Dell BIOS might load it. Do you have any BIOS option to disable microcode ?

[krusaderr]

theres no option for it in the bios.
shouldnt the sleep wake exploit bypass this? as in windows after you wake it from sleep you can adjust voltages and ratios

this is output for microcode commands

[cyring]

Preventing Microcode Updates on Intel Haswell Xeon

[cyring]

Do you have SpeedShift (technically called HWP) ?
Because HWP when enable in BIOS takes the lead over Turbo ?
In the Processor window of CoreFreq, Target is for Turbo and HWP, below, is using its own ratio.
Btw, z shortcut for HWP capabilities

Also in Performance window, you tune the performance hint. If HWP is activated then select lowest energy EPP for max speed; but if Turbo, aka no HWP, then set the profil im legacy perf hint

In short, if HWP activated then turbo is not in use

[krusaderr]

speedshift is enabled in my bios but i get this

all cores are at 3.8 turbo aswell

[cyring]

speedshift is enabled in my bios

Can you disable it ?
And just try to OC standard Turbo with CoreFreq

[cyring]

Also this version should manage HWP on your Xeon and let you see the capabilitites
CoreFreq_develop.tar.gz

Haswell/EP has never been tested with HWP registers so save/sync you files before loading the driver

[krusaderr]

i have disabled speedstep in my bios nothing happens in corefreq

none of the cores go past 3.5ghz

[cyring]

@krusaderr Up