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Mac Pro 5.1 Dual CPU upgrade question
- Thread starter ChristianBurger
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Yes, install the single CPU in socket A, which I believe is rearmost. Fans may go maximum warp (can’t recall if that’s the case here or only when intermixing CPU trays...), but you can use and test.
Yes, install the undamaged CPU in socket A (the one on the right hand side as you look into your cMP while it's standing upright in the normal position). I had to do this after my cMP failed to start up - I swapped CPU-B into CPU-A (and had nothing in CPU-B socket) and that was when I discovered it must have been CPU-A that was fried because it started up fine.
You should have no issues with it this way - you should be able to login and use it like normal, albeit on just one CPU. The only issue I encountered afterwards was with iStat Menus - it kept the second CPU metric spots in the iStat Menu dropdown, although they were just a dash to show no input or result. I uninstalled iStat Menus and then reinstalled it again and it but the issue persisted. Had no issues once my replacement CPU arrived, and worked fine again once I was running with dual CPUs again.
You should have no issues with it this way - you should be able to login and use it like normal, albeit on just one CPU. The only issue I encountered afterwards was with iStat Menus - it kept the second CPU metric spots in the iStat Menu dropdown, although they were just a dash to show no input or result. I uninstalled iStat Menus and then reinstalled it again and it but the issue persisted. Had no issues once my replacement CPU arrived, and worked fine again once I was running with dual CPUs again.
You should have giving the specs of your Mac Pro, looks like you have a 2009/4.1
Did you upgrade the firmware to 5.1?
Did you read about the difference between the two?
Here a lot think you need to delid the cpu's, but that is totally not neccesary, just read about what to do,...rivets
Unfortunately most refer to the forum, much easier than reading yourself.
I'm pretty sure you run a 4.1/5.1.
I hate to do your homework.
Did you upgrade the firmware to 5.1?
Did you read about the difference between the two?
Here a lot think you need to delid the cpu's, but that is totally not neccesary, just read about what to do,...rivets
Unfortunately most refer to the forum, much easier than reading yourself.
I'm pretty sure you run a 4.1/5.1.
I hate to do your homework.
Yeah, can you clarify which system you have? Title says 5,1, and I see no other mention of 4,1 or 2009, but you do mention not delidding, which suggests maybe you were going to but haven't yet? I personally am in favor of delidding on the 4,1 dual— it isn't difficult and takes any guessing out of reattachment of heatsinks.
Anyway, if you DO have a 4,1 w/ 5,1 firmware and are trying to test lidded CPUs, you may not be getting the geometry or pressure right in the socket.
I'm not the one who is going to do your homework for you!
About this Mac/ system report tells you whether your firmware is 4.1 or 5.1
Delidding for an amateur who doesn't know the difference is asking for more trouble than simply use the 'other' way, again I'm not going to do the homework for people who prefer the forum, maybe somebody else wants to, I have better things to do.
PS delidding makes sence when you tried a handfull of old CPU's, I do NOT advise this to beginners,...again is TOTALLY unnessecary
About this Mac/ system report tells you whether your firmware is 4.1 or 5.1
Delidding for an amateur who doesn't know the difference is asking for more trouble than simply use the 'other' way, again I'm not going to do the homework for people who prefer the forum, maybe somebody else wants to, I have better things to do.
PS delidding makes sence when you tried a handfull of old CPU's, I do NOT advise this to beginners,...again is TOTALLY unnessecary
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Right, but the fact that you MENTIONED delidding made me wonder if you were testing PRIOR to delidding. So, you first say you have a 4,1 upgraded to 5,1, then that you have a 5,1. Look at About this Mac and let it tell you whether 2009 or 2010/2012 based on the serial #, not just the firmware. OR, just look at the original CPUs— what speed are they and do they have IHS still attached?
Thanks for the support.
I don't want to take the risk. So a non delidded cpu will work?
You betcha. The point I was making about risk is that you have to choose if you want to risk, say, damage to the CPU socket due to a slightly different configuration w/ a lidded CPU, or risk damage to the CPU delidding it. IMHO, there's not a risk-free method...you're just choosing what you're wiling to risk. To me, I'd rather lose a ~$95 CPU before a ~$400 CPU tray.
Not sure of your situation, but in the US, I can get $70 single CPU trays via eBay. This seems like a silly thing to do at first, but the low cost and ability it gives you to test a more expensive set of CPUs first can make it quite a good investment.
I personally don't have experience w/ using lidded CPUs in the 2009 duals, so you might need to review the other posts and tips about that. Or perhaps someone willing to help can chime in.
I gotcha. Like I said, it's a matter of preference and risk evaluation. Good luck w/ the new CPU...hope it arrives quickly!