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#1
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Is something wrong with this?
Hi!
A7V600 AMD XP 2500+ RAM Kingston 512 MB Here is the output from Asus probe (NO LOAD): Ext clock 166 MHz Current speed 1833 MHz in BIOS set to OPTIMAL speed BIOS rev. 09/02/2004 CPU 46 / 114 C/F MB 31 / 87 C/F +12V 12,288V + 5V 4,811V + 3,3V 3,04-3,056V 1,76 Vcore (BIOS 1,63V) ----------------------- Ext clock 200 MHz Current speed 2200 MHz in BIOS set to OPTIMAL speed CPU 51 / 123 C/F MB 32 / 89 C/F +12V 12,352 - 12,416V 99% of time 2nd value + 5V 4,757 - 4,784V --------II----------- + 3,3V 3,04-3,056V 99& of time 1st value 1,76 Vcore (BIOS 1,63V) All components dafault - no improvements. Thank you. |
#2
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Is something wrong with this?
felix wrote:
Hi! A7V600 AMD XP 2500+ RAM Kingston 512 MB Here is the output from Asus probe (NO LOAD): Ext clock 166 MHz Current speed 1833 MHz in BIOS set to OPTIMAL speed BIOS rev. 09/02/2004 CPU 46 / 114 C/F MB 31 / 87 C/F +12V 12,288V + 5V 4,811V + 3,3V 3,04-3,056V 1,76 Vcore (BIOS 1,63V) ----------------------- Ext clock 200 MHz Current speed 2200 MHz in BIOS set to OPTIMAL speed CPU 51 / 123 C/F MB 32 / 89 C/F +12V 12,352 - 12,416V 99% of time 2nd value + 5V 4,757 - 4,784V --------II----------- + 3,3V 3,04-3,056V 99& of time 1st value 1,76 Vcore (BIOS 1,63V) All components dafault - no improvements. Thank you. The power supply could have a spec on the label, saying what percentage of error is acceptable. If it does not, here is a table of allowed values from a copy of the standards from formfactors.org . Table 3. DC Output Voltage Regulation Output Range Min. Nom. Max. Unit +12VDC (1) ±5% +11.40 +12.00 +12.60 Volts +5VDC ±5% +4.75 +5.00 +5.25 Volts +3.3VDC ±5% +3.14 +3.30 +3.47 Volts -5VDC ±10% -4.50 -5.00 -5.50 Volts -12VDC ±10% -10.80 -12.00 -13.20 Volts +5VSB ±5% +4.75 +5.00 +5.25 Volts (1) At +12 VDC peak loading, regulation at the +12VDC output can go to ±10%. Your motherboard draws processor power from +5V. That means +5V is the most heavily loaded. The +12V is only used to power hard drives, fans, and perhaps the video card if the card has an Aux connector. But your 3.3V is the one that is out of spec. Some power supplies tie the outputs together via turns ratio, and the supply doesn't have the ability to correct for any possible loading pattern. The specs on formfactors.org, give a chart with a "cross regulation" diagram, which shows how asymmetric the loading can be, and the supply still stay within the regulation limits stated in the above table. I suspect you did not collect your data above, under the most stressful conditions. You should have used Speedfan or MBM5 to read the voltages, and collected voltage readings while in Windows. Then, fire up a copy of Prime95 (mersenne.org) and used the "torture test" option. That loads the processor at 100% loading. That would cause your power supply voltages to drop even further. Using Prime95 would also give a realistic picture of your Vcore voltage. The Asus load line for Vcore, will generally overvolt above the BIOS setting a bit, when there is no load on the processor. Your 1.76V value is a bit more overvolt than normal, but not enough to cause a panic. (With a BIOS 1.65 setting, I might expect to see 1.68 to 1.70 readout.) But the real test for Vcore, is when Prime95 is running. Vcore is allowed to drop (the drop is by design, and is called a load line, and the load line is actually specified in the processor data sheet, so it is supposed to drop like that). You will then find the measured Vcore value is lower than the setting in the BIOS. I would prefer to see your Prime95 voltage readings before passing judgement, but I expect if you did that test, you'd find the power supply is way out of spec. You need to buy a power supply with good 5V rating. Many modern supplies place the emphasis on +12V. But your board doesn't even have the ATX12V 2x2 connector, so a modern supply is half wasted for such an application. This supply is an example of a good substitute. The combined 3.3V and 5V loading, is allowed to be 185W, which should handle a 5V @ 20A load quite easily. ENERMAX EG365P-VE FMA 1.3 ATX 350W http://www.newegg.com/Product/Produc...82E16817103455 The 24 pin connector on that power supply, comes apart into two pieces. A 4 pin section on one end, slides off the body of the connector, leaving a 20 pin section that you plug into your motherboard. And in case you think power ratings are all covered by the overall power rating of the power supply, here is a 600W power supply. The 3.3V and 5V current ratings on this supply, are slightly lower than those on the Enermax above. Most of your money spent on this supply, goes into providing more +12V, which is not needed for your application. The high voltage readings for +12V in your posting, tell me you are not using very much 12V. So a supply like this is a waste. http://www.newegg.com/Product/Produc...82E16817701004 HTH, Paul |
#3
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Is something wrong with this?
felix wrote:
Hi! A7V600 AMD XP 2500+ RAM Kingston 512 MB Here is the output from Asus probe (NO LOAD): Ext clock 166 MHz Current speed 1833 MHz in BIOS set to OPTIMAL speed BIOS rev. 09/02/2004 CPU 46 / 114 C/F MB 31 / 87 C/F +12V 12,288V + 5V 4,811V + 3,3V 3,04-3,056V 1,76 Vcore (BIOS 1,63V) ----------------------- Ext clock 200 MHz Current speed 2200 MHz in BIOS set to OPTIMAL speed CPU 51 / 123 C/F MB 32 / 89 C/F +12V 12,352 - 12,416V 99% of time 2nd value + 5V 4,757 - 4,784V --------II----------- + 3,3V 3,04-3,056V 99& of time 1st value 1,76 Vcore (BIOS 1,63V) All components dafault - no improvements. Thank you. 2200MHz was very easy to obtain with the Barton 2500+, using stock voltages. My best was something like 2460MHz on an Asus A7N8X Deluxe Rev2. |
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