Tag Archives: sleep

GA B75M-D3H sleep problem

Computer Aid Posted on by

I have a Gigabyte B75M-D3H motherboard, and decided to try upgrading from 1333Mhz RAM to 1600Mhz RAM.

It didn’t work (either because the CPU cant handle it, or the motherboard can’t).

The Gigabyte website said it should work.

So then I looked at the bios version, and I was on version F4, and the latest was F14.

A quick upgrade later, I found the 1600 RAM still didn’t work, so I gave up.

A few days later, my PC started acting strange:

  • Sometimes it wouldn’t come out of sleep.
  • After it refused to “wake up” even hitting the reset button didn’t seem to make it restart
  • At some point I even had to switch off the power at the wall
  • A few days later, it got worse: it suddenly refused to start… I tried everything, and it started to look like a motherboard failure (or a bad bios flash)

As a last resort, I decided to find the “clear CMOS” pins (2 metal pins near the row of pins for the front switches and lights)… just remove all power, and short out the 2 pins with a screwdriver (I have a special jumper for shorting it out)… maintain the short for 5 – 10 seconds.

After that, I was relieved that the motherboard finally started working correctly.

Overnight, the PC went into sleep mode, and then resumed normally the next day.

I must remember this for times when it appears the PC is dead due to a motherboard fault! KBYWJ95GCHCQ

Vista 64 hangs when going to sleep

Computer Aid Posted on by

While testing a PC with Vista 64, I noticed that it would “sleep”, but then not come back to “life”.

I’d end up having to press the power button twice, and then Vista would complain that it wasn’t restored correctly from sleep.

I had adjusted some bios settings (a DP45SG motherboard), so I looked at those first, and narrowed it down to either: “EIST”, “S3 sleep state”, “VT”, or “UEFI”.

A bit of research later, and I now understand what those abbreviations mean.

It turned out that the problem was due to UEFI being enabled.

UEFI (Unified Extended Firmware Interface) is supposed to be a good thing, as it allows for (amongst other things) booting from hard drives bigger that 2Tb… not needed right now, but drives bigger than 2Tb are just around the corner.

But it seems that proper motherboard support for UFEI is still not quite right.

So, I disable UEFI, and Vista started “sleeping like a baby” 🙂

And if you want to know about EIST: its really just speedstep… the motherboard dynamically lowers the FSB multiplier… so that CPU, RAM, etc runs slower, use less power, and generate less heat… but it switches to full speed when needed.