Power supply for Intel 850GB motherboard
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From: Abhishek Srivastava on 28 Sep 2006 05:21 Hi all, I'm still using a computer that I assembled around 5 yrs back. It has a 1.4 GHz P4 processor and an Intel 850 GB board. The problem is that the Power Supply stopped working a few days back. I went to hunt for it in the hardware stores here and none of them have the obsolete power supply anymore. Somebody told me that I can use the same Power Supply Unit that is being used in the contemporary systems. The only problem is that the 850 GB board had to be supplied power through 3 connectors(One for the board, one for the processor and one which seems to be or the IDE controllers, pls correct me if I'm wrong). The latest power supply units have only two power connectors for the board, and the one for the IDE controllers seems to be missing. Can I use a new power supply unit for my board? Any help will be greatly appreciated as Intel has stopped supporting my board. Thanks, Abhishek Srivastava
From: Mike T. on 28 Sep 2006 09:15 "Abhishek Srivastava" <abhishek.srivastava78(a)gmail.com> wrote in message news:1159435282.444648.14350(a)i3g2000cwc.googlegroups.com... > Hi all, > > I'm still using a computer that I assembled around 5 yrs back. It has a > 1.4 GHz P4 processor and an Intel 850 GB board. The problem is that the > Power Supply stopped working a few days back. I went to hunt for it in > the hardware stores here and none of them have the obsolete power > supply anymore. > > Somebody told me that I can use the same Power Supply Unit that is > being used in the contemporary systems. > > The only problem is that the 850 GB board had to be supplied power > through 3 connectors(One for the board, one for the processor and one > which seems to be or the IDE controllers, pls correct me if I'm wrong). > The latest power supply units have only two power connectors for the > board, and the one for the IDE controllers seems to be missing. > > Can I use a new power supply unit for my board? > > Any help will be greatly appreciated as Intel has stopped supporting my > board. > > Thanks, > Abhishek Srivastava > It seems you have four choices: 1) Search for the exact model number of power supply on ebay. You might be surprised to find a new one, reasonably priced. 2) If you can find the specs. of the third connector, you could always cut that connector off of the old power supply, and splice it onto any new power supply. Power supplies generally supply +12V, +5V or +3.3V. So if you can find out what voltage is on what cable of the third connector, it should be easy to find a source of that voltage (and ground) to tap into, on any current power supply. 3) Kind of a long-shot, but you might be able to find an adapter to hook up to any current power supply to give you the 3rd connector you need. 4) Best suggestion: Considering the age of the system, it is likely that it won't last much longer, even if you do happen to get it powered up again. I'd suggest you replace it with a cheap barebone system, one with onboard video if your current video adapter is too old to be supported by current mainboards. This might not cost much more than a decent power supply anyway. One example follows, just add RAM and move your disk drives into the new case: http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2456829&Sku=G452-2548%20E
From: spodosaurus on 28 Sep 2006 09:56 Abhishek Srivastava wrote: > Hi all, > > I'm still using a computer that I assembled around 5 yrs back. It has a > 1.4 GHz P4 processor and an Intel 850 GB board. The problem is that the > Power Supply stopped working a few days back. I went to hunt for it in > the hardware stores here and none of them have the obsolete power > supply anymore. > > Somebody told me that I can use the same Power Supply Unit that is > being used in the contemporary systems. > > The only problem is that the 850 GB board had to be supplied power > through 3 connectors(One for the board, one for the processor and one > which seems to be or the IDE controllers, pls correct me if I'm wrong). > The latest power supply units have only two power connectors for the > board, and the one for the IDE controllers seems to be missing. > > Can I use a new power supply unit for my board? > > Any help will be greatly appreciated as Intel has stopped supporting my > board. > > Thanks, > Abhishek Srivastava > If its a standard ATX board the new ATX power supplies will still work with it. They have more wires but the four extra pins on the end should just slide off (they do on my Antec PSUs for my VIA chipset based boards). I'm not sure what you mean about a third plug for the motherboard: ATX only ever had two to my recollection, and not all even had this! The main (long, two rows) one and the four pin add on for some boards (P4 boards only?). Each hard disk has its own connection, but these go directly to the disks, not the board. Regards, Ari -- spammage trappage: remove the underscores to reply I'm going to die rather sooner than I'd like. I tried to protect my neighbours from crime, and became the victim of it. Complications in hospital following this resulted in a serious illness. I now need a bone marrow transplant. Many people around the world are waiting for a marrow transplant, too. Please volunteer to be a marrow donor: http://www.abmdr.org.au/ http://www.marrow.org/
From: Tweek on 28 Sep 2006 13:34 This power supply has the connectors you need. I use them all the time for Gateway Pentium 4 machines. http://www.newegg.com/Product/Product.asp?Item=N82E16817182006 "Abhishek Srivastava" <abhishek.srivastava78(a)gmail.com> wrote in message news:1159435282.444648.14350(a)i3g2000cwc.googlegroups.com... > Hi all, > > I'm still using a computer that I assembled around 5 yrs back. It has a > 1.4 GHz P4 processor and an Intel 850 GB board. The problem is that the > Power Supply stopped working a few days back. I went to hunt for it in > the hardware stores here and none of them have the obsolete power > supply anymore. > > Somebody told me that I can use the same Power Supply Unit that is > being used in the contemporary systems. > > The only problem is that the 850 GB board had to be supplied power > through 3 connectors(One for the board, one for the processor and one > which seems to be or the IDE controllers, pls correct me if I'm wrong). > The latest power supply units have only two power connectors for the > board, and the one for the IDE controllers seems to be missing. > > Can I use a new power supply unit for my board? > > Any help will be greatly appreciated as Intel has stopped supporting my > board. > > Thanks, > Abhishek Srivastava >
From: Paul on 28 Sep 2006 15:19
Abhishek Srivastava wrote: > > Hi all, > > I'm still using a computer that I assembled around 5 yrs back. It has a > 1.4 GHz P4 processor and an Intel 850 GB board. The problem is that the > Power Supply stopped working a few days back. I went to hunt for it in > the hardware stores here and none of them have the obsolete power > supply anymore. > > Somebody told me that I can use the same Power Supply Unit that is > being used in the contemporary systems. > > The only problem is that the 850 GB board had to be supplied power > through 3 connectors(One for the board, one for the processor and one > which seems to be or the IDE controllers, pls correct me if I'm wrong). > The latest power supply units have only two power connectors for the > board, and the one for the IDE controllers seems to be missing. > > Can I use a new power supply unit for my board? > > Any help will be greatly appreciated as Intel has stopped supporting my > board. > > Thanks, > Abhishek Srivastava In the picture here, it looks like the board uses an ATX pre 2.0 supply. Your motherboard has a 20 pin main power connector, a 2x2 ATX12V connector for the processor, and other cables that power hard drives or CDROM etc. http://prohardver.hu/html/lap/850gb/d850gb.png Some of the ATX 2.0+ supplies have a 24 pin connector, and four of the pins unsnap, so the supply will also work with a 20 pin motherboard. It is also possible to plug a 24 pin connector into a 20 pin motherboard, as long as there is room for the four extra pins to hang over one end. That won't work in your case, since there are objects on either end of the main power connector that would get in the way of the extra pins. An ATX 2.0+ supply with detachable pins on the 24 pin connector, should work OK, as the resulting 20 pin section will fit perfectly. Here are some specs for ATX supplies. The first two specs are similar to the supply you have currently. The third spec is what you are likely to find in the shops. http://web.archive.org/web/20030424061333/http://www.formfactors.org/developer/specs/atx/ATX_ATX12V_PS_1_1.pdf http://www.formfactors.org/developer/specs/atx/ATX12V_1_3dg.pdf http://www.formfactors.org/developer\specs\ATX12V_PSDG_2_2_public_br2.pdf First, compare page 27 of the first spec, to page 29 of the second spec. The -5V signal on the connector was made optional at some point, and there is not a lot of good reasons for a motherboard to need -5V. Occasionally, there are motherboards that still draw a tiny amount of current from that signal, and for those motherboards, a supply that has no wire connected to pin 18 might be a problem. I hope this won't be a problem for you. Page 36 of the third spec shows a modern dual output supply. As long as the four extra pins on the 24 pin connector can be unclipped, you should be able to use one of those supplies. Note that, with the use of SATA drives, there may be fewer connectors that you can use with your ribbon cable based hard drives. Your processor draws about 55 watts: http://processorfinder.intel.com/details.aspx?sSpec=SL4WS If using an ATX 2.0+ supply, the CPU current comes from 12V2. The 55 watts of the processor is (55W/12V)*(1/0.90) = 5.09A from 12V2. The 0.90 factor assumes the Vcore conversion on the motherboard is 90% efficient. I expect a lot of ATX 2.0+ supplies will be able to manage the 5A loading. I guess I could clarify the difference a bit. With a pre 2.0 supply, there was one output signal for +12V that drives all the 12V wiring. Typically, I might recommend to a person they get a 12V @ 15A rating (as printed on the label on the side of the supply), as a good minimum for a P4 system. Your computer uses 5A for the processor, and will use maybe 3-4 more amps for hard drives, fans, CDROM etc. You can see that 15A should be a reasonably generous spec for your system. (Maybe you'd find that kind of support on a 300-350W supply. Check the label to be sure.) The ATX 2.0 supplies split the 12V output. They use one circuit to power the processor via the 2x2 square connector. That is 12V2. They use 12V1 to power hard drives, the motherboard 12V wire, and any other 12V loads. The label will list two ratings like 12V1 @ 8A and 12V2 @ 7A. The total is still 15A, but the current is segregated to two output circuits. If using one of those ATX 2.0 supplies (with the removable 4 pins on the 24 pin connector), you'd be checking for a supply with at least 5A on 12V2, and at least as many amps for 12V1 (to run hard drives). Many of the true ATX 2.0+ supplies will supply more current than this, so even if you blindly just buy one, I bet it will work. So you can use a number of ATX power supplies to solve the problem. If your board really needs the -5V on pin 18, that could be a problem. But otherwise, if you get either an older 20 pin, or a modern 24 pin (with removable 4 pin section), you should be able to use your computer again. Paul |