MemTest is a RAM tester that runs under Windows. It verifies that your computer can reliably store and retrieve data from memory. A correctly functioning computer should be able to do this with 100% accuracy day in and day out. Voila 3 7 1. A computer that fails these tests, perhaps because of old hardware, damaged hardware, or poorly configured hardware. Having ECC enabled in the BIOS does not ensure that ECC is working, only that the system will try to make use of it (e.g. You need to have an ECC compatible CPU and memory). The free version of Memtest (which we will use in this tutorial) will tell us if ECC is apparently supported.
Memtest Ecc Memory Upgrade
Mar 10, 2019 Physically, ECC memory differs from non-ECC memory (like what consumer laptop / desktop RAM uses) in that it has 9 memory chips instead of 8 (memory chips are used to store data that is sent to. Memtest cpu errors and how to do a memory not cpu test, 06:27 AM. Had some errors, showing up on cpu 0,1,2 on my ryzen 1700x. ECC Polling: Enabled. Back in 2002 some support was added to MemTest86 V3 to support ECC RAM (Error-Correcting Code RAM). A couple of years later in V3.1 support for additional memory controllers were added. In the options menu of MemTest86 V3 there was a 'ECC mode' that could be activated. Since 2004 this code to read ECC errors was never maintained.
Memtest Ecc Memory Test
I'm building my second FreeNAS server. (Aiming at a low power NAS that can run 24/7/365 without I feel it's using too much electricity. My old NAS uses >100 W in idle.)
Relevant to this thread is:
Motherboard: Supermicro X11SSM-F
CPU: Intel Pentium G4560
RAM: 1 x Samsung M391A2K43BB1-CRC (16GB DDR4 2400MHz ECC UDIMM)
(I know 2 DIMMs of the same type will be faster, but since the bottle neck will most likely be 1 Gbit LAN I figure it doesn't matter. I assume I will save a little power by using only one DIMM, and it's probably better to have 1 x 16 GB instead of 2 x 8 GB in the future, if I want to expand or repurpose the RAM.)
How can I know whether ECC is actually working? I can't find anything about ECC in BIOS. I think sometimes you can enable or disable ECC in BIOS, but I didn't find ECC mentioned at all.
When I run 'sudo dmidecode -t memory' from Ubuntu Live, it says 'Single-bit ECC'.
After some googling I found that for some people it says 'Multi-bit ECC'.
(Dmidecode does not seem to prove that ECC is working though. Someone said that dmidecode reported ECC on a computer he was sure didn't have ECC.)
So there are different kinds of ECC? Should I have bought something else?
I kind of feel like 'Hey! There are multi-bit ECC, why do I only have single-bit ECC?'
In case ECC would fix a bit error, or detect >1 bit errors, how will I know?
I was also wondering whether it's any use to run MemTest86 on ECC RAM? Maybe ECC will fix single-bit errors (if any), and MemTest86 will report 0 errors?
Parity Memory
I'm building my second FreeNAS server. (Aiming at a low power NAS that can run 24/7/365 without I feel it's using too much electricity. My old NAS uses >100 W in idle.)
Relevant to this thread is:
Motherboard: Supermicro X11SSM-F
CPU: Intel Pentium G4560
RAM: 1 x Samsung M391A2K43BB1-CRC (16GB DDR4 2400MHz ECC UDIMM)
(I know 2 DIMMs of the same type will be faster, but since the bottle neck will most likely be 1 Gbit LAN I figure it doesn't matter. I assume I will save a little power by using only one DIMM, and it's probably better to have 1 x 16 GB instead of 2 x 8 GB in the future, if I want to expand or repurpose the RAM.)
How can I know whether ECC is actually working? I can't find anything about ECC in BIOS. I think sometimes you can enable or disable ECC in BIOS, but I didn't find ECC mentioned at all.
When I run 'sudo dmidecode -t memory' from Ubuntu Live, it says 'Single-bit ECC'.
After some googling I found that for some people it says 'Multi-bit ECC'.
(Dmidecode does not seem to prove that ECC is working though. Someone said that dmidecode reported ECC on a computer he was sure didn't have ECC.)
So there are different kinds of ECC? Should I have bought something else?
I kind of feel like 'Hey! There are multi-bit ECC, why do I only have single-bit ECC?'
In case ECC would fix a bit error, or detect >1 bit errors, how will I know?
I was also wondering whether it's any use to run MemTest86 on ECC RAM? Maybe ECC will fix single-bit errors (if any), and MemTest86 will report 0 errors?