Perhaps the next week should be dedicated to looking for older AMD EPYC “Rome” systems and seeing if any have had >900 day uptime. If you are the type of admin that has a server up for around three years, then this might impact you. Others are going to think this bug is a major pain to track and deal with. Then again, a number of our readers are going to think this is silly with regular security patches.
If a typical server lifecycle is 5 years these days, then it means that one might need to do a minimum of a single reboot over its lifetime to avoid this bug, so long as the single reboot happens between days 9. The reason that the system had such high uptime is that it was part of a lab project that was outside our normal management tools and we forgot it was there apparently. We checked the STH lab and it appears as though we actually had a HPE AMD EPYC 7002 Rome system that we forgot about hit 2 years and 261 days or 991 days total uptime running Proxmox VE before the system was decommissioned. At the same time, this is a fairly big deal since the remedy is effectively rebooting a system. ( Source: AMD Revision Guide for AMD Family 17h Models 30h-3Fh Processors)įor most of our readers, machines will be rebooted once every so often for things like security patches or other maintenance windows. The time of failure may vary depending on the spread spectrum and REFCLK frequency.Įither disable CC6 or reboot system before the projected time of failure. This is not just speculation, instead, this is an official AMD Errata 1474 in 56323-PUB_1.01.Ī core will fail to exit CC6 after about 1044 days after the last system reset. AMD EPYC 7002 Rome CPUs Hang After Less Than 3 Years of Uptime While there are many bugs in processors given their complexity, this one is particularly interesting.
AMD LINK FAILURE SERIES
In 2017, AMD replaced all of its APUs with new Zen-based Raven Ridge chips, finally ending Bulldozer once and for all.Thanks to a reader that sent in this Reddit post we were alerted that the AMD EPYC 7002 “Rome” series core can hang after just under 3 years of uptime, or around 1044 days. The Bulldozer APUs even made it onto the AM4 platform and were universally panned for being pointless. AMD also failed to innovate on its APUs, so by the time the A10-7890K launched in 2016, it was just barely ahead of Intel's integrated graphics. AMD even got sued for misleading investors about the sales first-generation Llano APUs would bring in. And if you owned one of these APUs and wanted to get a discrete GPU down the line, it was highly likely you would get CPU bottlenecked.Īs expected, these APUs didn't do particularly well. But here's the other problem: Who cares? There's only a thin slice of the market that would want desktop-sized processors for gaming but don't want or can't use discrete graphics. Forcing edid (This is most likely when your monitor failed to be up due to. BTW, i had the same issue before the upgrades. Check DisplayPort Cable If the DisplayPort cable connection is improper. the only thing i have not changed the LCD itself. Turning the LCD on and off (Rarely works) Adding a Raspberrypi to the HDMI and switching sources. To make up for this, APUs came with the fastest integrated graphics you could buy. What works: Turning the machine on and off.
Firstly, with up to four cores, these APUs were basically just quad-core FX chips and didn't have very competitive CPU performance. Phenom symbolized a new AMD that simply couldn't keep up with Intel. To make matters even worse, the first Phenom chips that hit the market had a terrible hardware bug that reduced performance by about 10%, and it took AMD half a year to ship patched CPUs. According to Anandtech, the top-end, "somber" Phenom 9900 scarcely beat even Intel's slowest quad-core Q6600, which consumed less power and was cheaper to boot. Unfortunately, Phenom dropped the ball in a big way. Intel finally beat AMD with its Core 2 chips in 2006, which put the pressure back on AMD to respond in kind. When Phenom launched in 2007, it was AMD's latest contribution to the CPU war that had been brewing since the early 2000s and that AMD had been winning with its Athlon 64 desktop and Opteron server CPUs. The other primary contributing factor involves what replaced Athlon: Phenom.Īlthough its name comes from the word 'phenomenal,' AMD's Phenom CPUs were perhaps only phenomenally disappointing. However, AMD peaked in the mid-2000s and soon entered a steady decline, thanks in part to Intel's dubious usage of marketing funds, a practice that it was sued and fined for. Then, the Athlon happened, potentially transforming AMD from an underdog into Intel's equal rival. In the beginning, AMD was merely a secondary supplier for Intel chips and later a small-time competitor.
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