Core Ultra5 225h CPU machine test memtest86 randomly freeze

[C.C]

I have tested a set(2PCS) of 6400 32GB CSODIMM on different 4 platform
There are
1.NUC(CPU: Ultra5 225H)
2.MINI PC(CPU: Ultra5 225H)
3.CSODIMM Platform (CPU: Ultra5 235)
4.ECC CSODIMM Platform (CPU: Ultra5 235)

Using the Memtest pro version 11.5
When the set test on 1&2 machine , it freezes in randomly time (caused on 1 hour , 12 hour , 20 hour , not the same every time )
But the same set test on 3&4 machine, it can PASS 24 hour even more

Is it a known issue on arrow lake H cpu series? Or the set of CSODIMM are actually corrupted?

[David (PassMark)]

There are no known freezing issues on any current CPU (with the current software).

A freeze doesn't have to be bad RAM. Could be the CPU or motherboard. Could also be temperature related or BIOS settings.

[C.C]

Hello David,

I found that while the sets freeze on Ultra 5 225H machines, it always freeze on test 9
Did you have any suggestion that I can adjust on BIOS or test configuration of memtest?

[David (PassMark)]

You could try running the RAM at a slower speed.

[C.C]

Hello David,

I update all test to Memtest Pro version V11.6

I have tested 2 set(4PCS) 32GB CSODIMM which hang on 6400MHz ,
when I down grade at 5600MHz on the NUC(Ultra 5 225H) , it can pass on more 24hours .(While 6400 MHz still freeze on Test 9)

So I borrow more machine to test
All I tested machines :
1.NUC(CPU: Ultra5 225H)
2.MINI PC(CPU: Ultra5 225H)
3.CSODIMM Platform (CPU: Ultra5 235)
4.ECC CSODIMM Platform (CPU: Ultra5 235)
5.MINI PC(CPU: Ultra7 255H , same series model with No.2 but different CPU)
6.Laptop PC(CPU: Ultra9 275HX)

The 2 sets (4PCS) Modules only freeze on Test 9 while using No.1 and No.2 machine (Both CPU : Ultra5 225h)
The other machines (No3.~No.6) all can test PASS over 24hours

Did you have any suggestion that I can adjust on BIOS or test configuration of memtest on Ultra5 225h machines?

[David (PassMark)]

You could check for new BIOS on the bad machines.

Or just accept that those first two machines aren't capable of running the RAM at 6400MT/s fast in a stable fashion.
(or you could start playing around with all the RAM timings, but we never bother with that. It is a lot of work for a minor gain and really the RAM should just work with the profiles it advertises)

[Jessica]

Hi C.C.
We have similiar experience. (same CPU ultra 225h )
frequently freeze at test9
If we disable all e cores (just use p cores), we can pass all the test.