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#1
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PSU missing 12v 4-pin connector 4 CPU power supply
Suggestions please to rig power for the square 4-pin 12v connection,
missing from the cabling from a CODEGEN 250X-1 250W PSU Have an MSI KM3M-V mATX board which has the square JPW1 (4-pin 12v) connector to power the CPU. 2x GND & 2x 12v pins showing. I don't know why this ATX PSU unit which is only 4-5 years old doesn't have the square pin for the CPU power supply. Maybe is too old and the new generation of CPU need direct higher power supply that the 20-pin socket can provide, but I'm only putting on a Sempron 2400 so I should be able to tap off 12V from somewhere and run it in with the correct male fitting. Thanks TJ |
#2
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On Wed, 15 Dec 2004 02:26:04 -0800, TJ Sackville-West wrote:
Suggestions please to rig power for the square 4-pin 12v connection, missing from the cabling from a CODEGEN 250X-1 250W PSU Get an adapter cable from Molex to the 12v connector. Have an MSI KM3M-V mATX board which has the square JPW1 (4-pin 12v) connector to power the CPU. 2x GND & 2x 12v pins showing. I don't know why this ATX PSU unit which is only 4-5 years old doesn't have the square pin for the CPU power supply. Maybe is too old and the new generation of CPU need direct higher power supply that the 20-pin socket can provide, but I'm only putting on a Sempron 2400 so I should be able to tap off 12V from somewhere and run it in with the correct male fitting. The 4 pin 12v connector was introduced with the P4, after your PSu was built. BTW, AMD recommends a 300W PSU minimum for the K7 line. But I've run a couple on 250W nits. -- Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB) http://mysite.verizon.net/res0exft/cpu.htm |
#3
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The 4 pin 12v connector was introduced with the P4, after your PSu was built. BTW, AMD recommends a 300W PSU minimum for the K7 line. But I've run a couple on 250W nits. I was under the impression that the additional connector not only provided more power but isolated power and ground planes for the CPU. --adam |
#4
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On Wed, 15 Dec 2004 11:36:06 GMT, Adam
wrote: The 4 pin 12v connector was introduced with the P4, after your PSu was built. BTW, AMD recommends a 300W PSU minimum for the K7 line. But I've run a couple on 250W nits. I was under the impression that the additional connector not only provided more power but isolated power and ground planes for the CPU. --adam I don't think it isolates ground and power might depend on the board. Some past boards would potentially run, albeit with the potential for instability, with only the 20-pin connector attached. Other boards won't, definitely must have 12 in at the 4 pin connector. |
#5
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On Wed, 15 Dec 2004 11:36:06 +0000, Adam wrote:
The 4 pin 12v connector was introduced with the P4, after your PSu was built. BTW, AMD recommends a 300W PSU minimum for the K7 line. But I've run a couple on 250W nits. I was under the impression that the additional connector not only provided more power but isolated power and ground planes for the CPU. What the board does with it depends on the board, but as far as the PSU is concerned, it's just another 12v line coming from the same place as the other 12v lines. Having the extra cinnector makes sure there's enough copper for the load of the CPU. -- Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB) http://mysite.verizon.net/res0exft/cpu.htm |
#6
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On Wed, 15 Dec 2004 18:37:57 GMT, Wes Newell
wrote: On Wed, 15 Dec 2004 11:36:06 +0000, Adam wrote: The 4 pin 12v connector was introduced with the P4, after your PSu was built. BTW, AMD recommends a 300W PSU minimum for the K7 line. But I've run a couple on 250W nits. I was under the impression that the additional connector not only provided more power but isolated power and ground planes for the CPU. What the board does with it depends on the board, but as far as the PSU is concerned, it's just another 12v line coming from the same place as the other 12v lines. Having the extra cinnector makes sure there's enough copper for the load of the CPU. True it's often just another lead from the same 12V rail (ignoring newer split-rail designs) BUT with the switch to ATX 2.03 some may also have shifted to more 12V current bias. In other words, typical 200-250W PSU bought today might be much more suitable for powering a (12V based VRM circuit) than an old PSU. Granted the label is "supposed" to help guide on in these choices but then we're back to the same timless argument about whether one can trust the label on any particular generic power supply. |
#7
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Thanks for the advice.I bought a 400W PSU. Started up OK first time
- Tuff Test lite shows all VGA OK - only problem is Windows 98 won't boot from the drive I had before. Tried another HDD and that won't boot either. Even tried booting from the CD ROM to install Sus Linux 9 and that seemed to go into a void too Is there some kind of a test probgam I can download to run from either CD or floppie to check the board in DOS? Thanks TJ Wes Newell wrote: On Wed, 15 Dec 2004 02:26:04 -0800, TJ Sackville-West wrote: Suggestions please to rig power for the square 4-pin 12v connection, missing from the cabling from a CODEGEN 250X-1 250W PSU Get an adapter cable from Molex to the 12v connector. Have an MSI KM3M-V mATX board which has the square JPW1 (4-pin 12v) connector to power the CPU. 2x GND & 2x 12v pins showing. I don't know why this ATX PSU unit which is only 4-5 years old doesn't have the square pin for the CPU power supply. Maybe is too old and the new generation of CPU need direct higher power supply that the 20-pin socket can provide, but I'm only putting on a Sempron 2400 so I should be able to tap off 12V from somewhere and run it in with the correct male fitting. The 4 pin 12v connector was introduced with the P4, after your PSu was built. BTW, AMD recommends a 300W PSU minimum for the K7 line. But I've run a couple on 250W nits. -- Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB) http://mysite.verizon.net/res0exft/cpu.htm |
#8
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On 19 Dec 2004 15:05:31 -0800, "TJ" wrote:
Thanks for the advice.I bought a 400W PSU. Started up OK first time - Tuff Test lite shows all VGA OK - only problem is Windows 98 won't boot from the drive I had before. Tried another HDD and that won't boot either. Even tried booting from the CD ROM to install Sus Linux 9 and that seemed to go into a void too Is there some kind of a test probgam I can download to run from either CD or floppie to check the board in DOS? Thanks TJ Did you try booting into the BIOS?...or a 98 rescue disk? Check your boot options in the BIOS. Have a nice one... Trent© Follow Joan Rivers' example --- get pre-embalmed! |
#9
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"TJ Sackville-West" wrote in message om... Suggestions please to rig power for the square 4-pin 12v connection, missing from the cabling from a CODEGEN 250X-1 250W PSU I don't know why this ATX PSU unit which is only 4-5 years old doesn't Mr Troll... 4-5 years makes it an antique as computer parts go. If it is a 250watt PSU then it won't have enough juice to run the system anyhow. If you want a modern computer, bite the bullet and buy a modern PSU. |
#10
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