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Wayne Youngman
Guest
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 Posted: Mon Dec 15, 2003 11:25 pm Post subject: NF7-S v2.0 : Why does FSB above 200MHz fluctuate? |
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Hi,
had a bit more spare time to play with my 3 month old AMD rig. I have
become aware that my FSB is changing by itself, even though it is set at
220MHz FSB in BIOS?.
The machine is running stably, but I am curious. One program that shows
this issue is CPU-Z (CPU Tab) where it shows you your FSB. Mine changes up
and down from 210MHz-FSB to 220MHz-FSB. My motherboard only does this when
I select above 200MHz-FSB. Could it be a sign that my PSU is beginning to
show the strain (ANTEC 300w) or just that the NF7-S is a little *wobbly* at
holding high value FSB.
I have captured a small video clip (.mov 3.4MB) that shows what I'm talking
about. Maybe you broadband owing dudes could take a quick peek at it for
me. .
http://www.waynes.spamtrap.btinternet.co.uk/CPUz_NF7s_Wobbly_FSB.MOV
Any ideas?
--
Wayne ][
Barton (AQXEA) XP2500+ @ 2.2GHz (10x220) - 1.775vCore
CoolerMaster Aero 7 Lite - 3,200rpm
ABIT NF7-S (v2.0 - BIOS#14)
512MB Dual TwiSTER PC3500 @ DDR440 1:1 (9,3,3,2.0 - 2.7v)
Sapphire Atlantis 9800 - 3.3ns Samsung (325/290 Default)
240GB (2x120GB) WD-SE SATA RAID-0 (NTFS - 16k Stripe)
Antec SX630II Mini-Tower Case Inc 300w PSU
2 x CoolerMaster 80mm Blue Neon Fans
WinXP-PRO-SP1
Cat 3.7 - DX9.0b |
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IC
Guest
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| Posted: Tue Dec 16, 2003 6:42 am Post subject: Re: NF7-S v2.0 : Why does FSB above 200MHz fluctuate? |
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Wayne Youngman wrote:
| Quote: | Hi,
had a bit more spare time to play with my 3 month old AMD rig. I have
become aware that my FSB is changing by itself, even though it is set
at 220MHz FSB in BIOS?.
The machine is running stably, but I am curious. One program that
shows this issue is CPU-Z (CPU Tab) where it shows you your FSB.
Mine changes up and down from 210MHz-FSB to 220MHz-FSB. My
motherboard only does this when I select above 200MHz-FSB. Could it
be a sign that my PSU is beginning to show the strain (ANTEC 300w) or
just that the NF7-S is a little *wobbly* at holding high value FSB.
I have captured a small video clip (.mov 3.4MB) that shows what I'm
talking about. Maybe you broadband owing dudes could take a quick
peek at it for me. .
http://www.waynes.spamtrap.btinternet.co.uk/CPUz_NF7s_Wobbly_FSB.MOV
Any ideas?
|
AFAIK, the FSB frequency is set by a PLL (Phased Lock Loop) integrated
circuit chip. Perhaps a capacitor or other component is missing from
the MB near that circuitry. An insufficient power supply would not
cause the FSB or the CPU frequency to vary like that. I've never seen
anything like that with any system I've built, including the current one
with a NF7-S and the FSB is running at 220 MHz (XP1700+ running at 2200
MHz). |
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Wayne Youngman
Guest
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| Posted: Tue Dec 16, 2003 9:17 am Post subject: Re: NF7-S v2.0 : Why does FSB above 200MHz fluctuate? |
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Wayne Youngman wrote:
| Quote: | Hi,
had a bit more spare time to play with my 3 month old AMD rig. I have
become aware that my FSB is changing by itself, even though it is set
at 220MHz FSB in BIOS?.
The machine is running stably, but I am curious. One program that
shows this issue is CPU-Z (CPU Tab) where it shows you your FSB.
Mine changes up and down from 210MHz-FSB to 220MHz-FSB. My
motherboard only does this when I select above 200MHz-FSB. Could it
be a sign that my PSU is beginning to show the strain (ANTEC 300w) or
just that the NF7-S is a little *wobbly* at holding high value FSB.
I have captured a small video clip (.mov 3.4MB) that shows what I'm
talking about. Maybe you broadband owing dudes could take a quick
peek at it for me. .
http://www.waynes.spamtrap.btinternet.co.uk/CPUz_NF7s_Wobbly_FSB.MOV
Any ideas?
|
"IC" wrote
| Quote: | AFAIK, the FSB frequency is set by a PLL (Phased Lock Loop) integrated
circuit chip. Perhaps a capacitor or other component is missing from
the MB near that circuitry. An insufficient power supply would not
cause the FSB or the CPU frequency to vary like that. I've never seen
anything like that with any system I've built, including the current one
with a NF7-S and the FSB is running at 220 MHz (XP1700+ running at 2200
MHz).
|
"Leadfoot" wrote
| Quote: | I think you would be on the right track in replacing the PSU. 300w is
very
low end now a days
Usually it will change just a wee bit but yours is way out of whack
Weird video
|
Hi guys,
thanks for feedback. Yes it is a funny video, made on a new NIKON coolpix,
the light was very low and I was handholding the camera so that's why its so
wobbly. So you think the most likely culprit is the PSU. I agree a 300w
ANTEC is cutting it close with my fairly loaded system. Weird thing is it
doesn't cause any instability problems, but I hate to see hardware that is
doing *Mysterious* things!.
Guesses so far:
1) PSU is too weak to juice all the components
2) The Mobo may have some slight defect
Oh well if I find anything else out I will post back. .
--
Wayne ][
Barton (AQXEA) XP2500+ @ 2.2GHz (10x220) - 1.775vCore
CoolerMaster Aero 7 Lite - 3,200rpm
ABIT NF7-S (v2.0 - BIOS#14)
512MB Dual TwiSTER PC3500 @ DDR440 1:1 (9,3,3,2.0 - 2.7v)
Sapphire Atlantis 9800 - 3.3ns Samsung (325/290 Default)
240GB (2x120GB) WD-SE SATA RAID-0 (NTFS - 16k Stripe)
Antec SX630II Mini-Tower Case Inc 300w PSU
2 x CoolerMaster 80mm Blue Neon Fans
WinXP-PRO-SP1
Cat 3.7 - DX9.0b |
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Leadfoot
Guest
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| Posted: Tue Dec 16, 2003 11:08 am Post subject: Re: NF7-S v2.0 : Why does FSB above 200MHz fluctuate? |
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I think you would be on the right track in replacing the PSU. 300w is very
low end now a days
Usually it will change just a wee bit but yours is way out of whack
Weird video
"Wayne Youngman" <waynes.spamtrap@btopenworld.com> wrote in message
news:brlfto$4t2$1@hercules.btinternet.com...
| Quote: | Hi,
had a bit more spare time to play with my 3 month old AMD rig. I have
become aware that my FSB is changing by itself, even though it is set at
220MHz FSB in BIOS?.
The machine is running stably, but I am curious. One program that shows
this issue is CPU-Z (CPU Tab) where it shows you your FSB. Mine changes
up
and down from 210MHz-FSB to 220MHz-FSB. My motherboard only does this
when
I select above 200MHz-FSB. Could it be a sign that my PSU is beginning to
show the strain (ANTEC 300w) or just that the NF7-S is a little *wobbly*
at
holding high value FSB.
I have captured a small video clip (.mov 3.4MB) that shows what I'm
talking
about. Maybe you broadband owing dudes could take a quick peek at it for
me. .
http://www.waynes.spamtrap.btinternet.co.uk/CPUz_NF7s_Wobbly_FSB.MOV
Any ideas?
--
Wayne ][
Barton (AQXEA) XP2500+ @ 2.2GHz (10x220) - 1.775vCore
CoolerMaster Aero 7 Lite - 3,200rpm
ABIT NF7-S (v2.0 - BIOS#14)
512MB Dual TwiSTER PC3500 @ DDR440 1:1 (9,3,3,2.0 - 2.7v)
Sapphire Atlantis 9800 - 3.3ns Samsung (325/290 Default)
240GB (2x120GB) WD-SE SATA RAID-0 (NTFS - 16k Stripe)
Antec SX630II Mini-Tower Case Inc 300w PSU
2 x CoolerMaster 80mm Blue Neon Fans
WinXP-PRO-SP1
Cat 3.7 - DX9.0b
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