DIMM's Issue 'PLEASE HELP'

Question

I recently bought a Dell Optiplex 790 from Amazon. (Service Tag: ) I was making some upgrades towards the computer like adding a new Graphics Card (Geforce GTX 760) and adding one RAM stick (6GB DDR3) into the black ram slot while having still the stock 2x2GB RAM sticks in the white DIMM slots. It was all working fine at that moment then I was most likely being stupid and changed a few of the booting options like the fan power and all stuff like that and closed it down for the night. (Be noted I was not wearing any anti-static bands however I did not touch any surfaces that could create static before making the upgrades). I woke the next day and turned to computer on and noticed: Power light was Orange then went to a solid Blue also there where numbers that showed 2 - 3 - 4 they then went a way and it showed a solid 1 there was also a sequence of beeps going 1 - 3 - 2 my monitor showed nothing and I later looked on the Dell Support page at all the diagnostic solutions I tried all of them and none seemed to work. I then went searching on youtube and found other people having the same problem and tried there methods but to my prevail these did not work either. There was one person that claimed there could be an issue with the capacitors but I am not sure. Please do review this email and see if you can help me locate and fix the problem at hand that would be so helpful. Thank you for your time,Reece

Tesla1856 · Answer

Return machine to original config (no extra ram etc.). See if it will then BIOS-Post and also run ePSA Diags. Also, edit your post and remove your ServiceTag.

Da_Vinman · Answer

Is a single 6GB DDR3 stick even available?

bradthetechnut · Answer

Apparently it does exist.  EBay 6GB DDR3 Stick Only an example.

bradthetechnut · Answer

Hi @BTKit,

All of the RAM needs to be the same capacity, MHz, and brand name. Crucial comes highly recommended as it's guaranteed to work in Dell's if using non-Dell memory. Kingston Value Brand (KVR) almost never works in Dell's.

As for making sure RAM sticks are the same, this isn't just Dell, but applies to most systems. One of our Rockstars, also has an Asus, can use 2 different brand memory, 1 brand at at a time, but not mixed though other specs are the same. In off-brand RAM, the volts can be off. There are very few situations where mixing RAM works.

Da_Vinman · Answer

@bradthetechnut wrote: Apparently it does exist.  EBay 6GB DDR3 Stick Only an example.   Nah, that's 2GB + 4GB auction, the standard for a 6GB total.

speedstep · Answer

After 1 stick you have to use pairs.

Ram must be LOW DENSITY and INTEL Compatible.

The 790 does not use SODIMM's aka Laptop Memory

You cannot mix ranks and it is not advised to mix vendors and speeds.

Compatible Ram is VERY specific and 4 gigs is the maximum size of supported DIMM for a total of 16 gigs max.

https://www.crucial.com/usa/en/optiplex-790-desktop/CT2348353

DDR3 PC3-12800 • CL=11 • UNBUFFERED • NON-ECC • DDR3-1600 • 1.35V • 512MEG X 64 •

bradthetechnut · Answer

@Da_Vinman wrote:

@bradthetechnut wrote:

Apparently it does exist. EBay 6GB DDR3 Stick

Only an example.

Nah, that's 2GB + 4GB auction, the standard for a 6GB total.

You're right. I didn't see it right away, lower in the description, it says 2 modules.

Optiplex Desktops

Was this post helpful?