Carette compressor first problem after 4 years.

Guess what the compressor had its first problem after 4 years.

It seems the non-return valve malfunctioned and blocked the inflow of the high pressure into the oil water seperator.

The end-result was a mini explosion when the steel tube removed itself from the ferrule after a too high pressure buildup 💣

the non-return valve before it failed

tube removed itself under the too high pressure

The culprit was the green rubber inside the non-return valve, it sheered off a small piece and that piece blocked the ingress of the high pressure air.

the failed non-return valve

The repair :

• ordered a spare ferrule set and used it to reconnect the steel tube to the non-return valve.
• removed the green rubber part so it no longer can block the inflow

All is fine again. No leaking even with the green rubber removed... 😎

RMA  CPU AMD 3700x after 16 months of use.

symptoms:

• daily BSOD (blue screen of death), frequency of crashes increased in the last months
• crashes during gaming and heavy loads
• spontaneous reboots
• CPU temps were normal under 100% load from stress benchmark cpu-z (60C) and 29C at idle.
• NO WHEA errors.

Diagnostics:

1. Clean install of windows10
2. Part swapping: you need to remove the things that are NOT the problem:
• changed the memory to QVL approved for the mainboard
• disabled/enabled XMP profile
• removed the 5700XT, swapped with RX580 and 6900XT
• changed the PSU from 750W to spare 850W
• downgraded the mainboard BIOS to the  version when I bought it.
• swapped the 3700X with a 3600: problem gone....
• swapped the 3700X with a 5800x: problem gone... (the 5800x is really hot and I returned it)
• moved the 3700X to my other PC and the problem moved with it!
3. installed OCCT v8 beta
• the memory test indicated no problems even after 24 hours
• used their CPU test with heavy load on the cpu cache and it flagged 2 cores as bad after 5 min.
• select CPU test, Small data set, mode extreme, load type variable, auto on the rest
• after a few hours the pc would BSOD or reboot during the stress test due to many errors.

workarounds:

• fixing cpu multiplier (36x) at normal speed in the BIOS or in Ryzen Master : super stable
• fixing cpu multiplier (39x) in the BIOS or in Ryzen Master : super stable
• fixing cpu multiplier (40x) in the BIOS or in Ryzen Master : errors after a few hours
• XMP on/off made no difference

Solution:

• RMA the CPU at AMD: https://www.amd.com/en/support/kb/warranty-information/rma-form

Kudos to AMD for a very fast RMA process!

• Mailed for a RMA on Thursday and mentioned all the diagnostics that I already did.
• received a prepaid DHL return label on Friday
• sent CPU back also on Friday by DHL Pickup service.
• CPU received on Monday at noon in the AMD RMA center in the Netherlands, Europe
• Confirmation Wednesday noon that the CPU passed inspection and RMA accepted
• Email on Wednesday 5pm that replacement CPU was shipped to me!
• Friday morning: brand new CPU 3700X