I have a very old pc:
Gigabyte x38-dq6 motherboard
Intel quad core 2.4ghz(I forgot its exact model but it should be from the first quad-cored cpu series of Intel)
4gb ddr2 ram
Nvidia Gtx970 graphics card
A few weeks ago, it suddenly stopped turning on. I thought it seems like a psu(coolermaster v750 750w) problem and tried it with my previous psu(cooler master extreme 600w, it is a working psu but it's fan had stopped working).
And it worked, pc got turned on and all the components were working.
So I ordered a new psu(Silverstone da850 850watt).Now the problem is, again pc not turning on. If I switch to my oldest psu(coolermaster extreme) , it works, but when I reconnect the new psu, pc doesnt work, not even turns on.
I think the new psu may be DOA. Is there another possibility? One thing I noticed is that, my pc motherboard has 8pin socket for cpu, there are four square outer pin and 4 a bit curved outer pin.My oldest psu has 4 pin cpu from a rail and another 4pin from another rail and it has 4 square outer pins and 4 curved in total. But my previous psu has 4+4pin cable and one of them has 2 squares, the other one has no squares.I was just using one of 4pins cable not the other 4pins which had no squares.
The new psu has not a 4+4 but a full 8pins cpu cable and has just 2 squares. It can be connected to the socket without using force but may this cause the problem, that the number of squares doesn't match?
I tried the new psu with the previous psu(v750) 's 4+4 cable too, just using one 4pins connector but it changed nothing.
When I connect the oldest psu with fan problem, the pc turns on. I am just using for test the motherboard and cpu connections to psu only.
Gigabyte x38-dq6 motherboard
Intel quad core 2.4ghz(I forgot its exact model but it should be from the first quad-cored cpu series of Intel)
4gb ddr2 ram
Nvidia Gtx970 graphics card
A few weeks ago, it suddenly stopped turning on. I thought it seems like a psu(coolermaster v750 750w) problem and tried it with my previous psu(cooler master extreme 600w, it is a working psu but it's fan had stopped working).
And it worked, pc got turned on and all the components were working.
So I ordered a new psu(Silverstone da850 850watt).Now the problem is, again pc not turning on. If I switch to my oldest psu(coolermaster extreme) , it works, but when I reconnect the new psu, pc doesnt work, not even turns on.
I think the new psu may be DOA. Is there another possibility? One thing I noticed is that, my pc motherboard has 8pin socket for cpu, there are four square outer pin and 4 a bit curved outer pin.My oldest psu has 4 pin cpu from a rail and another 4pin from another rail and it has 4 square outer pins and 4 curved in total. But my previous psu has 4+4pin cable and one of them has 2 squares, the other one has no squares.I was just using one of 4pins cable not the other 4pins which had no squares.
The new psu has not a 4+4 but a full 8pins cpu cable and has just 2 squares. It can be connected to the socket without using force but may this cause the problem, that the number of squares doesn't match?
I tried the new psu with the previous psu(v750) 's 4+4 cable too, just using one 4pins connector but it changed nothing.
When I connect the oldest psu with fan problem, the pc turns on. I am just using for test the motherboard and cpu connections to psu only.