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Possible WMC instability after processor upgrade

02-21-2010, 08:58 PM
I have a 2250 TV tuner card in my Windows 7 64-bit system that is a jack of all trades. I have just upgraded my cpu to a Q9550 last week and am getting a little instability (desktop crashing) and a couple blue screens. I had been using the beta of flash, so I uninstalled that and reinstalled the current release version, uninstalled and reinstalled the latest Nvidia driver (196.21) and I've just re-seated the tuner card. If the instability continues should I even consider reinstalling Win7 or should I continue to focus on drivers and hardware?

Any experience and advice appreciated.

02-21-2010, 10:19 PM
Maybe you need faster ram.

02-21-2010, 11:13 PM
Thanks for the reply rbnick. My psu, motherboard, and video card were all going bad around the end of last year, so I ended up getting the psu replaced, a new motherboard, and video card, and then got new RAM as well. I decided to wait on the cpu upgrade to see if I really needed it and after getting it last week I'm glad I did, it's great for multitasking. I got it for a great price at Micro Center. See current specs below. I'm hoping it was a little pci-e connector issue. I just reseated the card. Recently I have been pushing things a little inside the case as I added the new data drive and then the cpu without taking the MB out of the case.

I'll reinstall the OS if necessary, am just trying to identify the true cause of the instability.

CPU: Q9550 Core2 Quad
RAM: 4x2GB G.Skill DDR2 1066
Video: GTS250
TV Tuner: 2250
HD: OS 320GB, Data 1TB
DVD: Pioneer Bluray
OS: Windows 7 Home Premium 64-bit

02-22-2010, 01:34 PM
It seems as though it is the fact that you changed out the CPU. I'd try checking the temperature of the CPU and review any changes that may be required in the bios settings. If the CPU is running hot it may be due to a bad bond between the CPU, heat conducting grease and the heat sink.

I suppose it is possible that when you changed out the motherboard that some of the device drivers from the old motherboard are still being loaded and causing a conflict, but that seems to be pretty rare. Did you wipe the boot drive and reinstall the OS when you changed out the motherboard? If not, that may be what you need to do.

02-22-2010, 02:39 PM
Originally I just swapped the MB and tried it without reinstalling but (now that I think about it) I got some instability so I did reinstall the OS (and had to call MS 800 to reactivate it). I also did expand the boot partition from 50g to 75g using Gparted a couple days before changing the cpu. Could that be a cause?

Whenever I've checked the cpu temps in the BIOS after a blue screen they've been in the 37-41c range which isn't very hot. Also I've also installed a couple of VMs while WMC was running, which is a heavy load on the cpu and it didn't blue screen. Today I have been getting some instability with Firefox and is acting up a little...

What would you do from here?

02-22-2010, 04:09 PM
I guess you could go back to the old processor. If that is stable then maybe you just got a bad processor.

02-23-2010, 07:59 PM
Well, this morning WMC crashed again and then later the system froze and an odd sound came out of the speakers so i decide to reinstall the OS. I don't think it's a hardware issue as I ran the Sandra system stress suite last night and the processor passed with temps from 42-54c through the max out tests.

I think the 2250/WMC setup is a little touchy and I have installed some beta software like Office 2010, Flash 10.1, and thought it best to give it a clean install. I'm pretty sure this is what happened when I swapped out the MB the system was buggy like this and after a reinstall was stable. Hopefully it works again.

02-25-2010, 04:34 PM
As it turns out (so far it's running fine) you were pretty close with the RAM suggestion above. My MB auto settings weren't quite right for the RAM. I had to increase the voltage from the auto setting of 1.8 to the RAM rated 2.1V, and from the support forums for my RAM I had to increase the NorthBridge voltage from the auto setting of 1.1 to 1.3 volts.

The system "appears" to be stable as I've been using it all day and right now I have WMC recording a show, WMC live tv is almost full screen watching that channel, I have Kubuntu running in a VM, and iTunes was play the movie UP, and I have browsing and email going. CPU is walking at 14% load. The Q9550 is really powerful.

Thanks for the suggestions rbinck. In addition to this machine being my office workhorse, it's my DVR and I was able to record American Idol for the wife last night... :-)