Dual Xeon 2.8GHz not booting
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I'm building a killer PC for myself, but I have a problem: The PC won't boot normally. Configuration: dual Xeon 2.8Ghz 2MB Cache 800MHZ FSB Intel SE7525GP2 motherboard Enermax 485W powersupply ASus N6500 PCI-express VGA-adapter 40GB + 120GB harddrive DVD-player and DVD-rewriter Problem is, with a dual setup it boots, but doesnt get beyond the POST. With a single setup (CPU only in the first socket) it doesnt even power on. I have the feeling that my powersupply isn't enough for the machine, but I'm not entirely sure... WM.
What about weapons of mass-construction? -- modified at 15:19 Saturday 6th May, 2006 P.S. 1GB Kinston DDR 400 Ram is installed in the machine -
I'm building a killer PC for myself, but I have a problem: The PC won't boot normally. Configuration: dual Xeon 2.8Ghz 2MB Cache 800MHZ FSB Intel SE7525GP2 motherboard Enermax 485W powersupply ASus N6500 PCI-express VGA-adapter 40GB + 120GB harddrive DVD-player and DVD-rewriter Problem is, with a dual setup it boots, but doesnt get beyond the POST. With a single setup (CPU only in the first socket) it doesnt even power on. I have the feeling that my powersupply isn't enough for the machine, but I'm not entirely sure... WM.
What about weapons of mass-construction? -- modified at 15:19 Saturday 6th May, 2006 P.S. 1GB Kinston DDR 400 Ram is installed in the machine485W should be plenty esp. since it only boots with 2 cpus, what about the RAM? You could try slowing that down to be on the safe side. Remove the RAM and you should get the beeps for no RAM present. Elaine :rose: The tigress is here :-D
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485W should be plenty esp. since it only boots with 2 cpus, what about the RAM? You could try slowing that down to be on the safe side. Remove the RAM and you should get the beeps for no RAM present. Elaine :rose: The tigress is here :-D
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I'm building a killer PC for myself, but I have a problem: The PC won't boot normally. Configuration: dual Xeon 2.8Ghz 2MB Cache 800MHZ FSB Intel SE7525GP2 motherboard Enermax 485W powersupply ASus N6500 PCI-express VGA-adapter 40GB + 120GB harddrive DVD-player and DVD-rewriter Problem is, with a dual setup it boots, but doesnt get beyond the POST. With a single setup (CPU only in the first socket) it doesnt even power on. I have the feeling that my powersupply isn't enough for the machine, but I'm not entirely sure... WM.
What about weapons of mass-construction? -- modified at 15:19 Saturday 6th May, 2006 P.S. 1GB Kinston DDR 400 Ram is installed in the machineWillemM wrote:
I have the feeling that my powersupply isn't enough for the machine, but I'm not entirely sure...
It should be enough power. I would look at other possibilities: dual Xeon (Nocona) 110w x 2 (at full load) nVidia 6500 ~65W (I don't know the exact number, but 6800 == 105w and 6500 is listed at more than 50% of the 6800 but significantly less, so I made a guess) 12w per HD (these range 9-12w, choose high and you are safe) DVD RW 10w (12w if lightscribe, otherwise 8-10w is standard) that is approximately 319w, I am not sure of the exact power consumption of your motherboard, but it is below 100w. So unless there is a physical problem with your power-supply, you are well within the safe range. We run dual Xeons, with top-of-the-line graphics, 5 hard-drives and DVD RW, we do use a 550w, but have used the 450w prior to Nocona (95w prior to Nocona). Because we don't know what customers will do with the machines after they get them, we have to provide enough extra power to cover what users will "add" to the system. Generally you will not get a full post if you don't have enough power. I would start checking your CMOS settings. Where is it stopping? at boot? is your boot setup right? can you boot on CDROM without a hard-drive? What happens when it stops? does it shut off (this is a sign you are over-power, your powersupply will shutdown.) Is your power supply dual line powered? (separate line of power to CPU/motherboard from the rest of the equipment) _________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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WillemM wrote:
I have the feeling that my powersupply isn't enough for the machine, but I'm not entirely sure...
It should be enough power. I would look at other possibilities: dual Xeon (Nocona) 110w x 2 (at full load) nVidia 6500 ~65W (I don't know the exact number, but 6800 == 105w and 6500 is listed at more than 50% of the 6800 but significantly less, so I made a guess) 12w per HD (these range 9-12w, choose high and you are safe) DVD RW 10w (12w if lightscribe, otherwise 8-10w is standard) that is approximately 319w, I am not sure of the exact power consumption of your motherboard, but it is below 100w. So unless there is a physical problem with your power-supply, you are well within the safe range. We run dual Xeons, with top-of-the-line graphics, 5 hard-drives and DVD RW, we do use a 550w, but have used the 450w prior to Nocona (95w prior to Nocona). Because we don't know what customers will do with the machines after they get them, we have to provide enough extra power to cover what users will "add" to the system. Generally you will not get a full post if you don't have enough power. I would start checking your CMOS settings. Where is it stopping? at boot? is your boot setup right? can you boot on CDROM without a hard-drive? What happens when it stops? does it shut off (this is a sign you are over-power, your powersupply will shutdown.) Is your power supply dual line powered? (separate line of power to CPU/motherboard from the rest of the equipment) _________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
With both CPU's installed the fans turn on, but the board doesn't boot into the BIOS screen. When there's only one CPU installed the computer only switches on for a short moment and shuts off imidiatly. I have an enermax Noise taker 485W with a separate 12V rail for the motherboard. WM.
What about weapons of mass-construction? -
With both CPU's installed the fans turn on, but the board doesn't boot into the BIOS screen. When there's only one CPU installed the computer only switches on for a short moment and shuts off imidiatly. I have an enermax Noise taker 485W with a separate 12V rail for the motherboard. WM.
What about weapons of mass-construction?what's it's rating for 12V power? it should be listed on the side of the PSU in amps. *12 for wattage. The cpus, gfx cards, and disk drives all primarily draw 12v power. If you have a psu using an older design it might not be able to fully power the 12v rail even if it can put out enough total watts. If you have a multimeter, test this by measuring the voltage between a yellow and a black wire of the atx plug on the mobo when you hit the switch. You should see 12v. FOr completeness also test the aux 12v connector, and the red and orange wires of the atx plug (they should be +5 and +3.3v respectively over ground).
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what's it's rating for 12V power? it should be listed on the side of the PSU in amps. *12 for wattage. The cpus, gfx cards, and disk drives all primarily draw 12v power. If you have a psu using an older design it might not be able to fully power the 12v rail even if it can put out enough total watts. If you have a multimeter, test this by measuring the voltage between a yellow and a black wire of the atx plug on the mobo when you hit the switch. You should see 12v. FOr completeness also test the aux 12v connector, and the red and orange wires of the atx plug (they should be +5 and +3.3v respectively over ground).
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With both CPU's installed the fans turn on, but the board doesn't boot into the BIOS screen. When there's only one CPU installed the computer only switches on for a short moment and shuts off imidiatly. I have an enermax Noise taker 485W with a separate 12V rail for the motherboard. WM.
What about weapons of mass-construction?WillemM wrote:
When there's only one CPU installed the computer only switches on for a short moment and shuts off imidiatly.
That sounds like a power issue... but with one CPU you should be well below the power requirements.... I did find the motherboard requirements... higher than I expected. 131w maximum not counting CPUs.... Do you have extra power running to the graphics card or does it take all the power from the PCI-ex slot? I can't find that model with google. Not sure why it would be giving you power issues... but you can start testing from here. What I would do: Pull everything off power except motherboard and VGA (no drives, no CD-Rom) and one or two CPUs (or both one at a time). Double check that you have your power set properly on the motherboard. Is there an extra 8pin power that is on the motherboard? (20+4+8 or 24+8) are CPU coolers firmly attached? if your CPUs overheat the system will shut down, this is a safety state above 70C (or where-ever the CMOS is set to emergency shutoff). Start from a barebones system _________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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WillemM wrote:
When there's only one CPU installed the computer only switches on for a short moment and shuts off imidiatly.
That sounds like a power issue... but with one CPU you should be well below the power requirements.... I did find the motherboard requirements... higher than I expected. 131w maximum not counting CPUs.... Do you have extra power running to the graphics card or does it take all the power from the PCI-ex slot? I can't find that model with google. Not sure why it would be giving you power issues... but you can start testing from here. What I would do: Pull everything off power except motherboard and VGA (no drives, no CD-Rom) and one or two CPUs (or both one at a time). Double check that you have your power set properly on the motherboard. Is there an extra 8pin power that is on the motherboard? (20+4+8 or 24+8) are CPU coolers firmly attached? if your CPUs overheat the system will shut down, this is a safety state above 70C (or where-ever the CMOS is set to emergency shutoff). Start from a barebones system _________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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WillemM wrote:
When there's only one CPU installed the computer only switches on for a short moment and shuts off imidiatly.
That sounds like a power issue... but with one CPU you should be well below the power requirements.... I did find the motherboard requirements... higher than I expected. 131w maximum not counting CPUs.... Do you have extra power running to the graphics card or does it take all the power from the PCI-ex slot? I can't find that model with google. Not sure why it would be giving you power issues... but you can start testing from here. What I would do: Pull everything off power except motherboard and VGA (no drives, no CD-Rom) and one or two CPUs (or both one at a time). Double check that you have your power set properly on the motherboard. Is there an extra 8pin power that is on the motherboard? (20+4+8 or 24+8) are CPU coolers firmly attached? if your CPUs overheat the system will shut down, this is a safety state above 70C (or where-ever the CMOS is set to emergency shutoff). Start from a barebones system _________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
Following up on your tips: I have replaced the power supply with the one I borrowed from a friend. And it now boots into windows setup, all seems to work now. Also I checked the coolers, cleaned them and reattached them to the board, after checking if there wasn't a shortcircuit near the brackets underneath the motherboard. Somehow the power supply wasn't functioning as I thought it would. I will see into replacing the faulty one, since it's only a few months old :) Thanks for the help, now I'm going to enjoy this new power monster! :D WM.
What about weapons of mass-construction? -
Following up on your tips: I have replaced the power supply with the one I borrowed from a friend. And it now boots into windows setup, all seems to work now. Also I checked the coolers, cleaned them and reattached them to the board, after checking if there wasn't a shortcircuit near the brackets underneath the motherboard. Somehow the power supply wasn't functioning as I thought it would. I will see into replacing the faulty one, since it's only a few months old :) Thanks for the help, now I'm going to enjoy this new power monster! :D WM.
What about weapons of mass-construction?WillemM wrote:
Thanks for the help, now I'm going to enjoy this new power monster!
No problem, I didn't do much obviously. :) Enjoy! _________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)