Thread View: it.comp.hardware.cpu
6 messages
6 total messages
Started by Stevo
Sat, 20 Jun 1998 00:00
CPU unstable after memory upgrade
Author: Stevo
Date: Sat, 20 Jun 1998 00:00
Date: Sat, 20 Jun 1998 00:00
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Hi all, I've just installed an extra 32Mb SDRAM to my Cyrix 686 based machine to give a total of 64Mb. The CPU is a 686MX P200 running at 2x75MHz. It was running fine at this setting before the memory upgrade but now is very unstable (system lock-ups) at that speed. Using the P166 setting of 66x2 everything is solid as a rock. 8 months ago, when first setting up this CPU, motherboard and first stick of 32 Mb SDRAM I had similar problems. I ran it at the P166 setting for a couple of weeks, re-set to P200 setting and it worked fine. Do these things take time to run in? I had thought it might have something to do with the video card (S3 Virge2D/3D 4Mb) as the lock ups frequently occur when doing something graphicaly intesive (games or all the time with the OpenGL screensavers) but also during a windows session (moving the mouse?). I'm only asking out of curiosity as I'm really happy with the system now. Even runs those groovy OpenGL screen savers! Any ideas? Cheers Stevo
Re: CPU unstable after memory upgrade
Author: Tony Pomfrett
Date: Sat, 20 Jun 1998 00:00
Date: Sat, 20 Jun 1998 00:00
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Possibly the new memory is not up to scratch. You could check to see what speed the PCI bus is running at when the system clock is set at 75 MHz. Many boards give you the option to choose between System Clock divided by two (ie. 37.5MHz when System Clock is at 75 MHz) or a fixed setting of 33 MHz. If this is the case with your board, try setting the PCI clock to 33 MHz and the system clock to 75MHz and see if that helps. -- Check out the On Line PC Market at http://www.aline.com.au ________________________________________________ Regards, Email: Tony Pomfrett tonyp@aline.com.au Aline Computers Pty Ltd http://www.aline.com.au 1/7 Wilsons Road, Mount Hutton NSW Australia 2290 ________________________________________________ Stevo <stevo_s@powerup.com.au> wrote in article <358B0FD6.B4BA337B@powerup.com.au>... > Hi all, > > I've just installed an extra 32Mb SDRAM to my Cyrix 686 based machine to > give a total of 64Mb. The CPU is a 686MX P200 running at 2x75MHz. It was > running fine at this setting before the memory upgrade but now is very > unstable (system lock-ups) at that speed. Using the P166 setting of 66x2 > everything is solid as a rock. > 8 months ago, when first setting up this CPU, motherboard and first > stick of 32 Mb SDRAM I had similar problems. I ran it at the P166 > setting for a couple of weeks, re-set to P200 setting and it worked > fine. Do these things take time to run in? I had thought it might have > something to do with the video card (S3 Virge2D/3D 4Mb) as the lock ups > frequently occur when doing something graphicaly intesive (games or all > the time with the OpenGL screensavers) but also during a windows session > (moving the mouse?). I'm only asking out of curiosity as I'm really > happy with the system now. Even runs those groovy OpenGL screen savers! > Any ideas? > Cheers > Stevo >
Re: CPU unstable after memory upgrade
Author: Derek Morton
Date: Sat, 20 Jun 1998 00:00
Date: Sat, 20 Jun 1998 00:00
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Have a good look at www.tomshardware.com Derek On Sat, 20 Jun 1998 11:26:46 +1000, Stevo <stevo_s@powerup.com.au> wrote: >Hi all, > >I've just installed an extra 32Mb SDRAM to my Cyrix 686 based machine to >give a total of 64Mb. The CPU is a 686MX P200 running at 2x75MHz. It was >running fine at this setting before the memory upgrade but now is very >unstable (system lock-ups) at that speed. Using the P166 setting of 66x2 >everything is solid as a rock. >8 months ago, when first setting up this CPU, motherboard and first >stick of 32 Mb SDRAM I had similar problems. I ran it at the P166 >setting for a couple of weeks, re-set to P200 setting and it worked >fine. Do these things take time to run in? I had thought it might have >something to do with the video card (S3 Virge2D/3D 4Mb) as the lock ups >frequently occur when doing something graphicaly intesive (games or all >the time with the OpenGL screensavers) but also during a windows session >(moving the mouse?). I'm only asking out of curiosity as I'm really >happy with the system now. Even runs those groovy OpenGL screen savers! >Any ideas? >Cheers >Stevo
Re: CPU unstable after memory upgrade
Author: Peter Mansell
Date: Mon, 22 Jun 1998 00:00
Date: Mon, 22 Jun 1998 00:00
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>I've just installed an extra 32Mb SDRAM to my Cyrix 686 based machine to >give a total of 64Mb. The CPU is a 686MX P200 running at 2x75MHz. It was >running fine at this setting before the memory upgrade but now is very >unstable (system lock-ups) at that speed. Using the P166 setting of 66x2 >everything is solid as a rock. This CPU comes in two versions, 2.5x66MHz and 2.0x75MHz. Check the CPU to see which one you have and set the correct speeds. My experience is that the 66MHz CPU doesn't like the 75MHz setting, giving lockups etc.
Re: CPU unstable after memory upgrade
Author: eagle
Date: Mon, 22 Jun 1998 00:00
Date: Mon, 22 Jun 1998 00:00
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Hi, I would have to ask who installed the memory chip and was it done with antistatic protection. If not maybe your memory chip or a part insode is statically damamged. regards Kym Stevo <stevo_s@powerup.com.au> wrote in article <358B0FD6.B4BA337B@powerup.com.au>... > Hi all, > > I've just installed an extra 32Mb SDRAM to my Cyrix 686 based machine to > give a total of 64Mb. The CPU is a 686MX P200 running at 2x75MHz. It was > running fine at this setting before the memory upgrade but now is very > unstable (system lock-ups) at that speed. Using the P166 setting of 66x2 > everything is solid as a rock. > 8 months ago, when first setting up this CPU, motherboard and first > stick of 32 Mb SDRAM I had similar problems. I ran it at the P166 > setting for a couple of weeks, re-set to P200 setting and it worked > fine. Do these things take time to run in? I had thought it might have > something to do with the video card (S3 Virge2D/3D 4Mb) as the lock ups > frequently occur when doing something graphicaly intesive (games or all > the time with the OpenGL screensavers) but also during a windows session > (moving the mouse?). I'm only asking out of curiosity as I'm really > happy with the system now. Even runs those groovy OpenGL screen savers! > Any ideas? > Cheers > Stevo >
Re: CPU unstable after memory upgrade
Author: Stevo
Date: Thu, 25 Jun 1998 00:00
Date: Thu, 25 Jun 1998 00:00
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Thanks to all for your suggestions. My parts supplier suggested it must be incompitability between the old and the new DIMMs. He's offered to swap the old for new under warranty. Good onya Bozzo. Stevo Stevo wrote in message <358B0FD6.B4BA337B@powerup.com.au>... >Hi all, > >I've just installed an extra 32Mb SDRAM to my Cyrix 686 based machine to >give a total of 64Mb. The CPU is a 686MX P200 running at 2x75MHz. It was >running fine at this setting before the memory upgrade but now is very >unstable (system lock-ups) at that speed. Using the P166 setting of 66x2 >everything is solid as a rock. >8 months ago, when first setting up this CPU, motherboard and first >stick of 32 Mb SDRAM I had similar problems. I ran it at the P166 >setting for a couple of weeks, re-set to P200 setting and it worked >fine. Do these things take time to run in? I had thought it might have >something to do with the video card (S3 Virge2D/3D 4Mb) as the lock ups >frequently occur when doing something graphicaly intesive (games or all >the time with the OpenGL screensavers) but also during a windows session >(moving the mouse?). I'm only asking out of curiosity as I'm really >happy with the system now. Even runs those groovy OpenGL screen savers! >Any ideas? >Cheers >Stevo
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