Weird RAM problem

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M

merius

Commendable
Jul 26, 2016
2
0
1,510
OS: Win 10 Pro
Motherboard: Evga Classified SR-2
CPU : 2X Intel® Xeon® Processor W5580 (8M Cache, 3.20 GHz, 6.40 GT/s Intel® QPI)
SSD : Samsung 850 EVO 250GB
PSU : Seasonic Gseries 650 W (80 PLUS GOLD)
RAM : 2X4GB Corsair VENGEANCE 1600 MHz.
Cooler:2X Hydro Series™ H80i High Performance Liquid CPU Cooler.
Video :Quadro K4000 3GB DDR5 192 Bit


So I got this problem :

I want to replace my 2X4GB Ram with 6X4GB RAM 1333 MHz.
When I first put all the 6 sticks of ram it showed me only 5.
I took out all the sticks except 2 (one for each cpu in the correct slot number (red 1 CPU 0 and red 1 CPU 1) to see if it works.
Nothing shows

I tried the following:

---------------------

2 STICKS : Slot 1 SLOT 1:

Changed the dimms-nothing
Swap the dimms- nothing
Loose the cooler- nothing

2 STICKS : SLOT 3 SLOT 3:

ALL OK.

2 STICKS : SLOT 5 SLOT 5 :

ALL OK.
-------------------------
4 STICKS : SLOT 1-3 SLOT 1-3 :

3 dimms recognized.

Took the dimm from SLOT 1-CPU0 :

3 dimms recognized.

PUT back the dimm

Took the dimm from SLOT 1-CPU1:
2 dimms recognized.
-------------------------------------


So something is wrong with SLOT 1 CPU0.

BUT if something is wrong why does the 2X4GB 2X4GB Corsair VENGEANCE 1600 MHz WORK ?

And why TASK MANAGER shows me in the memory window :"Slots used 2 of 18 " (when 2X4GB Corsair VENGEANCE 1600 MHz is used)
or"Slots used 5 of 18 " (when 6X4 GB 1333 Mz)
WHY 18 ?

I have 6 slots for each CPU.

AND WHY CPU-Z shows 20 GB and EVGA E-LEET utility shows me 24 ??


















 
Solution
Lutfij
It now looks like you're trying to mix and match ram kits with the existing Samsung and your newly purchased Corsair. If so you should have the same kit/spec'd ram running on both your CPU sockets. Which explains
BUT if something is wrong why does the 2X4GB 2X4GB Corsair VENGEANCE 1600 MHz WORK ?
Click to expand...
^ Why this works when both kits are on both CPU socket ram slots.

The Samsung rams are ECC server grade modules while the Vengeance is non ECC.
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Lutfij

Lutfij

Titan
Moderator
Oct 7, 2009
53,904
4,711
173,390
Prior to doing your ram upgrade, have you made sure your BIOS is up to date? If your BIOS is up to date with revision A58 then the issue can be compounded to your ram's or the slot. Often times the BIOS update will work to clear up any missing ram issues. To rule out a faulty slot you may want to populate all 6 slots off one of your CPU's and see if they are recognized.

There is a variance with the ram shown via CPU-Z and E-Leet because of the discrepancy with the ram detected by your system. Can you confirm that all sticks of ram are detected or shown in BIOS?

Can you pass on the information for both the old and the new kits of ram inclusive of the SKU? You may also want to read through your manual, page 21, regarding ram slots population.
 
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M

merius

Commendable
Jul 26, 2016
2
0
1,510


SKU NEW RAM : m393b5170fh0-ch9

SKU OLD RAM : cmz8gx3m2a1600c9

The BIOS is up to date.

I've tried your suggestion and disabled one cpu(CPU1) with the jumper :so CPU0 shows 16 GB
I disabled CPU0: CPU1 shows 24 GB

I look trough the manual before and did it by the book.I think is something about the voltage since the old RAM1600 can be recognized and the new RAM 1333 can't..but that is just a thought
 
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Lutfij

Lutfij

Titan
Moderator
Oct 7, 2009
53,904
4,711
173,390
It now looks like you're trying to mix and match ram kits with the existing Samsung and your newly purchased Corsair. If so you should have the same kit/spec'd ram running on both your CPU sockets. Which explains
BUT if something is wrong why does the 2X4GB 2X4GB Corsair VENGEANCE 1600 MHz WORK ?
Click to expand...
^ Why this works when both kits are on both CPU socket ram slots.

The Samsung rams are ECC server grade modules while the Vengeance is non ECC.
 
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