mersenneforum.org  

Go Back   mersenneforum.org > New To GIMPS? Start Here! > Information & Answers

Reply
 
Thread Tools
Old 2010-02-03, 20:30   #1
Unregistered
 

11×823 Posts
Default Fatal error

Hello

I just unlocked my forth core by enabeling auto on ACC and ECC to hybrid. stock CPU no clocked.

When i run prime95 on all 4 workers. 1, 2, 3, 4

Worker #2 stop works after 18 min of every test attempt. but 1,3,4 still goes on.

I get the following error: "FATAL ERROR: Final result was 2B9D573D, expected F6BD0728" + "Hardware failure detected"

My PC: AMD phenom X3 720 BE 2.8ghz stock
Gigabit MA770T-UD3P
8Gb Corsair 1333mhz DDR3 With good heatsinker
ATI RADEON 4870 Icooler X3 1gb GDDR5
1.5TB HDD
Noctua Cooler 2X 120 Cooling fans operates at 2000 Silently RPMS. that is +4000
plus others. no warming issues there.
Chassi Aplus with 2X 120 cooling fans + side 250 Fan.
CPU cooling = 18 on idle. 30 on MAX heavy load.
Extra heat sinks on motherboard.

My cpu is a HEKA and not deneb. and yes my CPU and mother board supports 4X cores.

So whats the issue? help is very appreciated.

Regards
  Reply With Quote
Old 2010-02-04, 09:59   #2
Samoflan
 
Jan 2010

5 Posts
Default

Generally you can unlock the 4th core on a triple core processor, but that does not mean it will be 100% stable. Triple core processors are quad cores with one core disabled because it failed to pass quality control. Usually the extra core will function normally with everyday task, but its not until you strain it that it will show its weakness, hence why it was disabled in the 1st place and marketed as a triple core CPU.

There are some cases where AMD will take batches of perfectly good quad cores and disable one core to sell them as triple cores if demand merits. Though I believe that is a lot more rare to obtain one like that. It is really luck of the draw if you get a extra core that's 100% stable.

In normal day to day use you should be fine. I wouldn't recommend using it to run Prime95 to look for primes though, as that faulty core may give bad results. I'm not a expert though, this is just general knowledge I've gathered.
Samoflan is offline   Reply With Quote
Old 2010-02-26, 23:28   #3
Blackomega
 

131728 Posts
Default

Quote:
Originally Posted by Samoflan View Post
Generally you can unlock the 4th core on a triple core processor, but that does not mean it will be 100% stable. Triple core processors are quad cores with one core disabled because it failed to pass quality control. Usually the extra core will function normally with everyday task, but its not until you strain it that it will show its weakness, hence why it was disabled in the 1st place and marketed as a triple core CPU.

There are some cases where AMD will take batches of perfectly good quad cores and disable one core to sell them as triple cores if demand merits. Though I believe that is a lot more rare to obtain one like that. It is really luck of the draw if you get a extra core that's 100% stable.

In normal day to day use you should be fine. I wouldn't recommend using it to run Prime95 to look for primes though, as that faulty core may give bad results. I'm not a expert though, this is just general knowledge I've gathered.
AMD did in fact do this around dec.08/jan. 09. The demand for the 720 was so high that they had to. The way to tell if you actually got a quad was the cooler. "Normal" 720's come with an all aluminum heatsink; which is plenty to cool a 720 even slightly overclocked.
The "720's" that came with a 4 heat pipe heat sink were in fact a quad core that was rebranded as a triple core.

But those batches are long gone.

OP, fatal errors are usually caused by memory. Also, 720's have the C2 revision integrated memory controller. There are known issues with that particular controller with all 4 DIMMs (slots) occupied. Try taking 2 sticks out and run prime again, I'm betting that it wont error out.

Also, be sure that your RAM voltage is set appropriately. Most boards default to 1.5v, which is typically too low. Mine Patriot Viper ram calls for 1.9v and it runs just fine, although AMD recommends only using up to 1.65v RAM.

BTW I run a 720 also.
System specs: AMD 720BE Lapped @ 3.6GHz, Patriot Viper RAM @ 1600MHz (7-7-7-21-28-1T), 2x 1GB 4870, MSI 790FX-GD70, Lapped Thermaltake Big Typhoon.

PS: Heka is just what they dubbed the triple cores, once you unlock the 4th core CPUz will show it as a Deneb.
  Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fatal Error Unregistered Information & Answers 2 2012-07-27 03:13
Fatal Error Cameron2384 Information & Answers 3 2009-04-26 13:37
Fatal Error jerome2710 Information & Answers 0 2009-02-16 20:48
Fatal Error zPrime Information & Answers 21 2008-10-11 20:33
Fatal error on new PC. What to do? Unregistered Hardware 2 2005-09-05 21:14

All times are UTC. The time now is 07:04.

Tue Jun 15 07:04:12 UTC 2021 up 18 days, 4:51, 0 users, load averages: 1.56, 1.53, 1.47

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.