MP 1,1-5,1 Mac Pro 2010 unexpected shutdown

Manzanito

macrumors 6502
Original poster
Apr 9, 2010
344
395
Hi.

I have a 2010 5,1 with dual 2,4 quad core and an rx 580 pulse. In the last month I’m experiencing unexpected shutdowns when using fcpx and motion.

The first time I was using motion. As I’m using a fairly old ups, I attributed the shutdown to the ups, and simply switched cable to the regular plug and everything went fine.

A couple of weeks later, however, editing a fcpx project (nothing too demanding, multicam 3 streams of h264 1080p) I started experiencing shutdowns, no matter where I plugged the computer.

The shutdown code registered on the system log is 0, which is neither hardware nor software .

Could it be the psu is failing? One thing I’m thinking is the cable I’m using to feed the rx 580 is a 2x6 pin to 8 pin guts parker cable, I think their reputation is not so great. Is worth a shot changing the gpu cable? What other steps should I take to troubleshoot the issue? I tried the apple hardware test to no avail, must be because I need to do it with a mac efi card?

Thanks in advance.
 

Slash-2CPU

macrumors 6502
Dec 14, 2016
299
156
New Orleans, USA
Hi.

I have a 2010 5,1 with dual 2,4 quad core and an rx 580 pulse. In the last month I’m experiencing unexpected shutdowns when using fcpx and motion.

The first time I was using motion. As I’m using a fairly old ups, I attributed the shutdown to the ups, and simply switched cable to the regular plug and everything went fine.

A couple of weeks later, however, editing a fcpx project (nothing too demanding, multicam 3 streams of h264 1080p) I started experiencing shutdowns, no matter where I plugged the computer.

The shutdown code registered on the system log is 0, which is neither hardware nor software .

Could it be the psu is failing? One thing I’m thinking is the cable I’m using to feed the rx 580 is a 2x6 pin to 8 pin guts parker cable, I think their reputation is not so great. Is worth a shot changing the gpu cable? What other steps should I take to troubleshoot the issue? I tried the apple hardware test to no avail, must be because I need to do it with a mac efi card?

Thanks in advance.

99% likely it’s power-related.

Try a different dual 6-pin to single 8-pin. If you’re handy with soldering, on the current adapter, connect all the positive wires together and connect all the negative wires together. What’s probably happening is that one 6-pin is providing more power than the other, to the point that it overloads and cuts off(protection).

I did exactly that with my RX 580. The current drawn on the two 6-pin plugs is now balanced within a couple percent. Before, it was different by 15-25%.

If it still acts up, either do Netkas GPU power mod or new PSU.
 

Manzanito

macrumors 6502
Original poster
Apr 9, 2010
344
395
99% likely it’s power-related.

Try a different dual 6-pin to single 8-pin. If you’re handy with soldering, on the current adapter, connect all the positive wires together and connect all the negative wires together. What’s probably happening is that one 6-pin is providing more power than the other, to the point that it overloads and cuts off(protection).

I did exactly that with my RX 580. The current drawn on the two 6-pin plugs is now balanced within a couple percent. Before, it was different by 15-25%.

If it still acts up, either do Netkas GPU power mod or new PSU.
Thanks, I’ll try a different cable and report back with the results as soon as it arrives. In the meantime I’ve rescued my old 5770 tu run aht and see what happens.

—Edit— It didn’t even finish the hardware test with the amd 5770. I think the psu is most likely the culprit. Now I have to think if I change it or buy a new computer.
 

h9826790

macrumors G5
Apr 3, 2014
12,783
5,592
Hong Kong
Thanks, I’ll try a different cable and report back with the results as soon as it arrives. In the meantime I’ve rescued my old 5770 tu run aht and see what happens.

—Edit— It didn’t even finish the hardware test with the amd 5770. I think the psu is most likely the culprit. Now I have to think if I change it or buy a new computer.
If your cMP can still boot, check the PSU temperature. High temperature will reduce the max power output, and lower the PSU life span significantly.

And if the PSU temperature is quite high (e.g. above 50C), you may spin up the PSU fan and see if the situation improve. If yes, then almost 100% sure it's PSU failing.

TBH, if the computer can still do whatever you need, but just the PSU failed. Usually it can be easily fixed by re-cap the PSU. No need to go for any Mac specialist, just any good electronic repair shop, ask them to replace all the capacitors of your PSU. Then most likely can fix the issue (if it's really PSU failing).
 
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Manzanito

macrumors 6502
Original poster
Apr 9, 2010
344
395
Will check both. I really wanted to hold on to my mp a little longer, then move to the new model.
 

Manzanito

macrumors 6502
Original poster
Apr 9, 2010
344
395
Did you ever resolve this issue with your Mac Pro?
I’m not competent enough to test the power supply myself, so after talking to a guy at an apple store he recommended a technician in my zone that could repair it. I’ll share the outcome once I get the computer back.
 

Manzanito

macrumors 6502
Original poster
Apr 9, 2010
344
395
Well, just came back from the repair shop. Very, very weird. According to them all they did was reballing the old ati 5770 (I took it as well as the rx 580 just in case), but the power supply was ok.

The thing is, the problem seems to be gone, which makes no sense since the ati 5770 isn’t installed, and according to them it’s the only part they modified.

Will keep testing, but for now I’ve stressed the computer and it’s working reliably.