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Issues with Dell Optiplex 7010 when adding an additional 8gb of ram.

post #1 of 2
Thread Starter 
Hi all,

At work we have a number of the above mentioned mini towers. and for two of them I am seeing a super strange issue, that even the Dell suppliers where I am from one of their technicians cant seem to understand.

This 7010 as well as its sibling both have 4gb of ram. As soon as I put in the PC3-12,800 8gb sticks in addition to the 4gb we have lots of interesting issues cropping up.

It's important to note that I have at least 2 other machines exactly the same model which are working beautifully with the additional 8gb of ram. The OS on these machines is windows 7 professional.

These machines get to the login prompt and basically hang and completely locks up and restarts I cannot even login. Same thing happens if I am to redeploy windows during the installation. It hangs and restarts there as well. At the supplier we did a reinstallation and it worked perfectly with no issues, but as soon as I got it back to the office, we were back to square one.

I am literally out of ideas and even the technician that checked it out with me at the supplier couldnt figure out.

Could it be the power supply isnt providing enough power on these two machines that it would drop and cause the system to hang and eventually restart?

I also took of the heatsync on one of them and it looks like the thermal compound is rather dry so I am wondering if that could be another possible source of the issue.

Any help would be greatly appreciated.
Prebuilt rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
core 2 quad q9550 asus p5n-d  GTX 550 TI 8gb corsair xms2 2x4gb pairs 
Hard DriveOptical DriveOSMonitor
500gb sata drive & 2tb sata2 drive cd/dvd + cd/dvd burner windows vista ultimate 64bit aces x193w 
KeyboardPowerCaseMouse
microsoft keyboard 850 watts xigmatex modular psu cool master logitech optical 
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Prebuilt rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
core 2 quad q9550 asus p5n-d  GTX 550 TI 8gb corsair xms2 2x4gb pairs 
Hard DriveOptical DriveOSMonitor
500gb sata drive & 2tb sata2 drive cd/dvd + cd/dvd burner windows vista ultimate 64bit aces x193w 
KeyboardPowerCaseMouse
microsoft keyboard 850 watts xigmatex modular psu cool master logitech optical 
  hide details  
Reply
post #2 of 2
I'm going to guess that you have "mismatched" memory.

Long story short:
Just because memory specs say same speed and timings doesn't mean it's the same
Just because memory is the same manufacturer, model number, speed and timings doesn't mean it's the same either.

Many memory perimeters are determined by what ICs (the little black rectangles) are used to build the memory. Memory with the exact same specs may use different ICs. Memory manufacturers also often change ICs without changing specs or model numbers.

Some manufacturers designate IC changes by adding a revision (rev) number to the part number.
See Corsair's Memory Inquiry thread.

Hence, for 100% sure comparability, all memory to be used in a computer should be purchased as a "Matched Set".
Adding mismatched memory ( ie. same specs but different ICs) often works, but not 100% of the time.
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
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My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
Reply
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