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Pentium E5800 on MS-7255
#1
Hi,

I assume I must post my request here. I've recently bought an old Pentium E5800 socket 755 for my MSI P4M890M mobo.
The CPU is recognised in the AMI Bios, but is downclocked at 1.2GHz (multiplicator stuck at 6 instead of 16, FSB at 200MHz).
I've tried with different OSes (W10 and some Linux distros), so I'm certain that this is a BIOS limitation because the CPU isn't officially supported.


The BIOS can be found here : https://www.msi.com/Motherboard/support/...#down-bios


I hope this isn't the wrong section and that you can help me...

Thanks (I've attached my report)


Attached Files Thumbnail(s)
           

.txt   DESKTOP-B7F5U4T.txt (Size: 56.9 KB / Downloads: 2)
find
quote
#2
Download RWEverything. Try portable version.
Go to Access->Command and run the commands:
wrmsr 0x199 0x0 0x1025
rdmsr 0x198
Show a screenshot of results.
Then go to ThrottleStop's folder and delete file ThrottleStop.ini and run ThrottleStop.
Make a screenshot of ThrottleStop (main window) with running TS Bench.
find
quote
#3
Wow, well thanks for the fast reply Smile
There wasn't any ThrottleStop folder, so I downloaded it (had already tried to stop throttle but I know too little about it).


Attached Files Thumbnail(s)
       
find
quote
#4
Try to add microcode manually.
Add this microcode - https://github.com/platomav/CPUMicrocode...BF808E.bin
find
quote
#5
Thanks I'll try and reply here if it worked !
find
quote
#6
OK. Make new TXT-report of CPU-Z after flashing modded BIOS.
Don't forget do Load Defaults!
find
quote
#7
Unfortunately, adding the microcode didn't change anything.
I did a clear CMOS and loaded the defaults.

Here is the BIOS file I flashed


Attached Files
.rom   A7255VMS.ROM (Size: 512 KB / Downloads: 4)
.txt   Report.txt (Size: 57.01 KB / Downloads: 2)
find
quote
#8
Run RWEverything again.
Go to Access->Command and run the commands:
wrmsr 0x1a0 0x40 0x6A950481
wrmsr 0x199 0x0 0x1025
rdmsr 0x198
Show a screenshot of results.
find
quote
#9
Here it is


Attached Files Thumbnail(s)
   
find
quote
#10
Delete file ThrottleStop.ini and run ThrottleStop.
Make a screenshot of ThrottleStop (main window).
find
quote


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