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Any way to upgrade CMOS clock??
As the starting point, assume a PC with Intel Core-2 6300
at 1.86GHz, 32-bit Vista The CMOS clock (is it still called CMOS clock?) drifts about 2 secs/day on my machine. Is there any way to replace it with a much more precise clock? Are there any expansion cards available with high quality clocks to replace the default CMOS clock. I do not want the drift to exceed 1 second/week. Please do not bring up the synchronization issue with Internet servers. I want to synchronize only once/week at the most and not every day. |
#2
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Any way to upgrade CMOS clock??
wrote in message oups.com...
As the starting point, assume a PC with Intel Core-2 6300 at 1.86GHz, 32-bit Vista The CMOS clock (is it still called CMOS clock?) drifts about 2 secs/day on my machine. That's very accurate as motherboard clocks go. Consider yourself lucky. There's no way to replace a clock on a modern motherboard. If you don't mind paying way too much for a clock card: http://www.beaglesoft.com/clcahome.htm |
#3
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Any way to upgrade CMOS clock??
On 14 May 2007 16:54:05 -0700, "
put finger to keyboard and composed: As the starting point, assume a PC with Intel Core-2 6300 at 1.86GHz, 32-bit Vista The CMOS clock (is it still called CMOS clock?) drifts about 2 secs/day on my machine. Is there any way to replace it with a much more precise clock? You could add trimmer capacitors to the 32.768kHz and 14.31818MHz crystals. The original IBM AT had a trimmer cap for the latter. Are there any expansion cards available with high quality clocks to replace the default CMOS clock. I do not want the drift to exceed 1 second/week. AIUI, the RTC/CMOS RAM chip provides the initial hardware time reference using the 32.768kHz crystal. After bootup, the 14MHz crystal takes over and provides the reference for a "software" clock. Please do not bring up the synchronization issue with Internet servers. I want to synchronize only once/week at the most and not every day. If you are losing time after synchronising with an Internet time server, then I'd suspect that the 14MHz crystal needs trimming. - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
#4
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Any way to upgrade CMOS clock??
Unfortunately, the CMOS clock is not designed to be precisely accurate. It is
designed to be inexpensive. If your clock is drifting when the power is off, the issue is the 32KHz clock, or the backup battery; if you are drifting when the machine is on, it is the 14.318MHz clock. You could try replacing these crystals or oscillators on your motherboard, but the risk of damaging something is high, and the chance it would have a better result is iffy. Alas, the internet sync idea is the most practical solution for the vast majority of users. wrote: As the starting point, assume a PC with Intel Core-2 6300 at 1.86GHz, 32-bit Vista The CMOS clock (is it still called CMOS clock?) drifts about 2 secs/day on my machine. Is there any way to replace it with a much more precise clock? Are there any expansion cards available with high quality clocks to replace the default CMOS clock. I do not want the drift to exceed 1 second/week. Please do not bring up the synchronization issue with Internet servers. I want to synchronize only once/week at the most and not every day. |
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