Re: c000021a Unknown Hard Error (and many more)

JMSteele · 11-29-2007, 02:16 AM

RolodeX, did you manage to track down what was causing your trouble? I'm suffering through almost the exact same set of issues as you, even down to the inability of the system to create a memory.dmp file.

I've run through:HDTune (which doesn't show health status, though, even though I have SMART enabled in BIOS), MemTest, chkdsk, virus scanners (Sophos on this unit, multiple online virus checkers). Tried three different BIOS versions.

The pattern is that an application I'm working in (could be Firefox, IE, Word, VS Studio 2k5, Outlook, any app really) will lock; in short order the entire system will lock, followed by blue screen. The most recent stop error codes were "c0000021a Unknown Hard Error" and 000000F4. As mentioned, no memory dump is created, and the system log merely notes that the system shutdown was unexpected. I'm at my wit's end. Hope that someone can help.

My specs:
Intel qx6700 quad-cpu
evga 680i sli motherboard
BFG GeForce 8800 gtx oc
1 WD 150 gb Raptor sata hd
1 300 gb seagate sata hd
4g memory corsair xms2-6400
Antec 550 NeoHe PSU
Zalman cnps9500 at CPU Cooler
Lite-On LH-20AIL dvd burner

dai · 11-29-2007, 08:33 AM

Antec 550 NeoHe PSU
try a 750w+

JMSteele · 11-30-2007, 08:55 AM

Just a followup post for the benefit of those who might find this thread via a web search. My problems were resolved by setting my RAM back to 667mhz and also changing trc in the BIOS to 28 (much hanks to suggestion by "The Ram Guy"

over at Corsair's HouseofHelp web site.)

11-29-2007, 02:16 AM	#1 (permalink)
JMSteele Registered User Join Date: Nov 2007 Posts: 5 OS: Vista Ultimate 64-bit	Re: c000021a Unknown Hard Error (and many more) RolodeX, did you manage to track down what was causing your trouble? I'm suffering through almost the exact same set of issues as you, even down to the inability of the system to create a memory.dmp file. I've run through:HDTune (which doesn't show health status, though, even though I have SMART enabled in BIOS), MemTest, chkdsk, virus scanners (Sophos on this unit, multiple online virus checkers). Tried three different BIOS versions. The pattern is that an application I'm working in (could be Firefox, IE, Word, VS Studio 2k5, Outlook, any app really) will lock; in short order the entire system will lock, followed by blue screen. The most recent stop error codes were "c0000021a Unknown Hard Error" and 000000F4. As mentioned, no memory dump is created, and the system log merely notes that the system shutdown was unexpected. I'm at my wit's end. Hope that someone can help. My specs: Intel qx6700 quad-cpu evga 680i sli motherboard BFG GeForce 8800 gtx oc 1 WD 150 gb Raptor sata hd 1 300 gb seagate sata hd 4g memory corsair xms2-6400 Antec 550 NeoHe PSU Zalman cnps9500 at CPU Cooler Lite-On LH-20AIL dvd burner

11-29-2007, 08:33 AM	#2 (permalink)
dai Manager, Hardware Forums Join Date: Jul 2004 Location: west australia Posts: 56,759 OS: win 7 32x 64x rtm	Re: c000021a Unknown Hard Error (and many more) Antec 550 NeoHe PSU try a 750w+ __________________

11-30-2007, 08:55 AM	#3 (permalink)
JMSteele Registered User Join Date: Nov 2007 Posts: 5 OS: Vista Ultimate 64-bit	Re: c000021a Unknown Hard Error (and many more) Just a followup post for the benefit of those who might find this thread via a web search. My problems were resolved by setting my RAM back to 667mhz and also changing trc in the BIOS to 28 (much hanks to suggestion by "The Ram Guy" over at Corsair's HouseofHelp web site.)