Hello good people. I have a problem and I'm not sure where to put the blame. I'll give a brief description of the problem after I tell you my specs. My system is homebuilt almost 2 years ago. It is as follows:
Case-- Coolermaster Centurion 5
PSU-- Antec NEOhe 500W (modular cabling) More on that in a moment
Cpu-- Opteron 170 w/Thermaltake "Big Typhoon" cooler
MB-- Asus A8N-SLI Deluxe
Ram-- 1 gig Corsair Twinx XMS dual channel kit (2 x 512) 2-3-3-6 1T timings
Video- Asus Geforce 7600gs 512megs (passive cooling)
Floppy/cardreader-- dvd/rw drive-- 2 Seagate 160 Sata hard drives
My system started having power issues some time ago. The first psu I put in when I built it was an Antec TruPower 500W which started having issues and had to be RMA'd back to Antec. They were very good about it and replaced the defective one with a NEOhe 500W (seems the Trupower 500 was discontinued). Things went ok for a while untill I started having issues starting the computer up. If it was shut down I had to press the start button up to five or six times before it would finally start, (all the while the fans and light would be coming on and then going off. Sometimes if I tried too many times to start up it would reset the cmos and I would have to go back into bios and set up all over again.
Again I called Antec about it and went over the symptoms, switching the power and reset switches on the motherboard but made no difference. Again they were very good about replacing it. Now I am on my third Antec psu, and it did indeed solve the startup problems. Now, however, after only a week or so since installation, my computer has developed some new power related problems. I have had this system overclocked to 2.8ghz stable for quite some time, and last night after doing some tweaking I ran prime95 for about 8 hours. (No errors!) I stopped the test this morning and figured all was well. Then I tried to run Super_pi multiple times and could not get a correct checksum. I tried several small changes in voltage (vdimm, vcore and ram timings) none made any difference in super_pi, (still incorrect checksum). I even set the bios back to default settings and still could not get a correct checksum. I ran memtest 86 for several complete runs and had no errors.
Now this evening, I noticed (using speedfan) that my temps were randomly spiking and then going back to normal. I wasn't even running any programs at the time. I checked using cpuz and found my vcore was fluctuating from a low of 1.39v all the way up to 1.5 on occasion. I don't want to think about another RMA, but I will if I must. Does anyone know if this could be a bios issue or some hardware issue on the board. I keep all my mb drivers up to date and bios is latest version, but it seems unlikely that 3 PSUs from the same manufacturer would all turn out to be lemons. I f anyone has any Ideas, I would be most grateful for the input. Thanks in advance.
Case-- Coolermaster Centurion 5
PSU-- Antec NEOhe 500W (modular cabling) More on that in a moment
Cpu-- Opteron 170 w/Thermaltake "Big Typhoon" cooler
MB-- Asus A8N-SLI Deluxe
Ram-- 1 gig Corsair Twinx XMS dual channel kit (2 x 512) 2-3-3-6 1T timings
Video- Asus Geforce 7600gs 512megs (passive cooling)
Floppy/cardreader-- dvd/rw drive-- 2 Seagate 160 Sata hard drives
My system started having power issues some time ago. The first psu I put in when I built it was an Antec TruPower 500W which started having issues and had to be RMA'd back to Antec. They were very good about it and replaced the defective one with a NEOhe 500W (seems the Trupower 500 was discontinued). Things went ok for a while untill I started having issues starting the computer up. If it was shut down I had to press the start button up to five or six times before it would finally start, (all the while the fans and light would be coming on and then going off. Sometimes if I tried too many times to start up it would reset the cmos and I would have to go back into bios and set up all over again.
Again I called Antec about it and went over the symptoms, switching the power and reset switches on the motherboard but made no difference. Again they were very good about replacing it. Now I am on my third Antec psu, and it did indeed solve the startup problems. Now, however, after only a week or so since installation, my computer has developed some new power related problems. I have had this system overclocked to 2.8ghz stable for quite some time, and last night after doing some tweaking I ran prime95 for about 8 hours. (No errors!) I stopped the test this morning and figured all was well. Then I tried to run Super_pi multiple times and could not get a correct checksum. I tried several small changes in voltage (vdimm, vcore and ram timings) none made any difference in super_pi, (still incorrect checksum). I even set the bios back to default settings and still could not get a correct checksum. I ran memtest 86 for several complete runs and had no errors.
Now this evening, I noticed (using speedfan) that my temps were randomly spiking and then going back to normal. I wasn't even running any programs at the time. I checked using cpuz and found my vcore was fluctuating from a low of 1.39v all the way up to 1.5 on occasion. I don't want to think about another RMA, but I will if I must. Does anyone know if this could be a bios issue or some hardware issue on the board. I keep all my mb drivers up to date and bios is latest version, but it seems unlikely that 3 PSUs from the same manufacturer would all turn out to be lemons. I f anyone has any Ideas, I would be most grateful for the input. Thanks in advance.