Xeon Owners Club

[Toothless]

I've found in the past that sometimes its just the RAM not quite making contact with the pins in the slot... Take RAM out and put in again, give the slot a quick blast with some canned air if poss just in case any dust etc. is in there... It seems to work for me.. Have a UD7 that was the same and a few other boards as well.. It can be a right pain in the but.....

Did that. Seems to be a combo of the board having issues physically and voltages. It's dropped down to 16GB at times with 48 installed. The kicker is AIDA64 will show all the ram but task manager won't.

 

[Edwired]

Did that. Seems to be a combo of the board having issues physically and voltages. It's dropped down to 16GB at times with 48 installed. The kicker is AIDA64 will show all the ram but task manager won't.

Try swapping the rams around until the bios shows all 48gb I had to do that to my board when I ran into the snag with 12gb showing 8gb since then it worked like a charm

 

[Toothless]

Try swapping the rams around until the bios shows all 48gb I had to do that to my board when I ran into the snag with 12gb showing 8gb since then it worked like a charm

Did that too

 

[Edwired]

What board do you have that causing all this problem

 

[Toothless]

What board do you have that causing all this problem

It's the SR-2 build in my signature. Messing with the sockets does change things but I've accepted getting 40/48GB for now. Too tired to keep messing with it.

 

[Edwired]

Did that too

Also do the screenshot of the north bridge intel Westmere IMC timing and the spd in aida64 something tells me that the bios is messing with the timings as I seen somewhere that loosing up Row Refresh Cycle Time (tRFC) seems to fix the missing rams on some board

 

[lexluthermiester]

Did that too

Have you tried taking out half of the RAM, just 24GB?

 

[Toothless]

Have you tried taking out half of the RAM, just 24GB?

Yep. Still never saw all ram there unless it was with the small air coolers.

 

[lexluthermiester]

Yep. Still never saw all ram there unless it was with the small air coolers.

What about using matching sets? Or are they all the same? Also, have you checked the PIN-pads in the bottom of the CPU to make sure there is no contamination?

 

[Toothless]

What about using matching sets? Or are they all the same? Also, have you checked the PIN-pads in the bottom of the CPU to make sure there is no contamination?

Ram is all the same, and both CPUs and sockets are clean as can be.

 

[lexluthermiester]

Ram is all the same, and both CPUs and sockets are clean as can be.

Damn... Have you tried a different pair of CPU's(if you have them)?

EDIT: just had a thought, possible PSU problem?

 

[Zyll Goliat]

Ram is all the same, and both CPUs and sockets are clean as can be.

What about the pins on the mobo?Also maybe you can try to put manually memory-timings and add a bit of voltage for the memory as you have now all mem slots occupied sometimes they need a bit more of V to operate properly.....just my 2 cents....

 

[Toothless]

Damn... Have you tried a different pair of CPU's(if you have them)?

EDIT: just had a thought, possible PSU problem?

These are the first 1366 chips I've owned, and this problem is across three PSUs.

What about the pins on the mobo?Also maybe you can try to put manually memory-timings and add a bit of voltage for the memory as you have now all mem slots occupied sometimes they need a bit more of V to operate properly.....just my 2 cents....

Ram is all the same, and both CPUs and sockets are clean as can be.

And already said about voltages.

 

[Edwired]

I never heard of the psu causing ram issue it have to be the cpu/motherboard/ram/bios either one of these is the issue unless the the cpu itself has a dud imc

 

[Toothless]

It's so weird.

 

[freeagent]

I've thought about this on and off for about 10 years. I thought it was board, CPU, ram, voltage, settings.. bios. I honestly don't know why it drops ram. It does seem to work better (for me) using 4gb dimms. But I only have two and I have to mix the rest for a max of 16gb in my case. I had better luck using older bioses compared to the newest for my board (R3F). It would drop ram inside a case, outside a case. The last time I tried I had luck with it for a couple of months until I broke it down to use my z77 again. But when I moved to an older bios it ran really well..

 

[Edwired]

It's so weird.

Need more info go to motherboard list there then screenshot chipset -> North Bridge: Intel Westmere IMC and the same again for SPD as it will list the timings it currently running and the spd timings according to the ram

 

[phill]

It might simply be that some of the memory slots aren't working correctly and just starting to fail I've had a few issues with different CPUs and RAM in that UD7 board, it's very frustrating..

When was the last time it showed all the RAM installed? Daft question, can you check all the RAM in another rig just to make sure that the RAM is not faulty?

 

[Toothless]

Need more info go to motherboard list there then screenshot chipset -> North Bridge: Intel Westmere IMC and the same again for SPD as it will list the timings it currently running and the spd timings according to the ram

When I get home sure.

It might simply be that some of the memory slots aren't working correctly and just starting to fail I've had a few issues with different CPUs and RAM in that UD7 board, it's very frustrating..

When was the last time it showed all the RAM installed? Daft question, can you check all the RAM in another rig just to make sure that the RAM is not faulty?

Right before I swapped coolers all 48 came up. I can check 2 sticks at a time in my 5350 but I just left for work. If I'm not dead later I'll see about trying it.

 

[freeagent]

I've had this issue on an off since I started using x58.. I just didn't talk about it because I thought I could figger it out.

The only thing I didn't try was a different cooler. With the exception of my H100, it didn't have a high clamp pressure like all of my others. So I guess I did try that lol. It could be the connection between pads and pins I suppose. Maybe they should have made the pins 5 thou longer. In my case, the biggest help was 4gb dimms and an ancient bios.

 

[Toothless]

Well I tried with 6 instead of 12 and same issue, 16/24 was there. Usually if I reboot it enough or tweak how tight the coolers are I'll get all 48 going.

 

[Edwired]

Ok try doing memorytest to rule out any ram issue on the working board whenever you can. Yeah I think it something to do with the cooler as it is only thing that could be causing as if you overnighten the 4 screws it plays havoc same goes if it too loose same results. You may want to check the board if it not bend like a banana after the cooler is put on. You have to look at it like an eagle eye to see the height differences. But please don't go too extreme on tighting each screws you will risk the socket pins getting too flat losing connection to the cpu. Otherwise you have to do the needle pin and magnifying glass method in order to lift the every pin high enough to make connection work with the cpu

 

[Toothless]

Ok try doing memorytest to rule out any ram issue on the working board whenever you can. Yeah I think it something to do with the cooler as it is only thing that could be causing as if you overnighten the 4 screws it plays havoc same goes if it too loose same results. You may want to check the board if it not bend like a banana after the cooler is put on. You have to look at it like an eagle eye to see the height differences. But please don't go too extreme on tighting each screws you will risk the socket pins getting too flat losing connection to the cpu. Otherwise you have to do the needle pin and magnifying glass method in order to lift the every pin high enough to make connection work with the cpu

I think it's just the board bending. Gotta twist and try all the combos and maybe change voltages to make it all work.

 

[phill]

Right before I swapped coolers all 48 came up. I can check 2 sticks at a time in my 5350 but I just left for work. If I'm not dead later I'll see about trying it.

Might be worth a look to re-seat the CPUs and just check the mounts on the cooler, too much pressure etc. could put it out I guess?

 

[Toothless]

Might be worth a look to re-seat the CPUs and just check the mounts on the cooler, too much pressure etc. could put it out I guess?

I think it's just the very fine way the cpu has contact. Like one side has to be tighter than the other and the stars gotta align but only in that one spot 33 miles south of the north most part of the Mississippi river during the spring months