---
category:
  - "[[Journal]]"
type:
  - "[[Log]]"
  - "[[Reflection]]"
title: probable faulty i7-4790K cpu
created: 2026-05-17T06:42:13
date: 2026-05-17
tags:
---
recently setup a on site '[[pve-block|nas box]]' with a bunch of [[HGST Ultrastar 7K6000 Series 4TB SAS HDD (x10)|sas drives]], and last [[2026-05-16|night]] noticed that my gigabit network wasn't being saturated during [[OpenZFS|zfs]] send/receive. [[Proxmox|Proxmox]] was showing significant cpu/io stall pressure, probable diagnosis; my old [[Intel Core i5-4570S CPU|4th gen i5 cpu]] was struggling to keep up this fairly easy task. I've had this cpu from new and it's been used in various builds over the years with no issues at all, However, now it looks like it's finally reached the end of it's useful life.

I've still got a [[Intel Core i7-4790K CPU|4th gen i7]] which should quickly solve my issue, but when I swapped them, the computer failed to boot using my [[ASRock H87M-ITX Motherboard|itx board]]. Which was strange because I'd only just removed it from this itx board (with the same memory) in favour of the more power efficient i5.

I also had this recent [[2026-03-31 1758 faulty gryphon z87 motherboard|issue]] (nothing to do with this, ) [[ASUS Gryphon Z87 Motherboard|gryphon motherboard]] was faulty. the hardware setup at that point was:
- [[Intel Core i5-4570S CPU]]
- [[ASUS Gryphon Z87 Motherboard]]
- [[Kingston HyperX Genesis 8GB DDR3 RAM (2x4GB kit)]]

the failing setup last night
- [[Intel Core i7-4790K CPU]]
- [[ASRock H87M-ITX Motherboard]]
- [[Kingston HyperX Genesis 16GB DDR3 RAM (2x8GB kit)]]

there's no cross over there