Highlighted
Clement703
Copper

XPS 8500 Memory Problems

My new CPS 8500 had 8GB (2x5GB modules) and I wanted to upgrade to 16MB. The Manual show and system specs show the memory speed is 1600. I ordered and installed them with the new chips in slots 1and 3 and the old ships in slots 2 and 4.. (The manual says to pair like memory on 1/3 and 2/4) The computer "beeped" on restart and would not boot. I removed the new memory and noted the modules are 12600, not 1600.  With only the original chips installed, the computer booted fine but it only sees 4GB installed, not 8GB. I installed only the two new chips and computer booted fine but again only showed 4GB installed.  I tried all four chips with old ones in slots 1/3 and new ones in 2/4. Computer would not boot.

 

Two questions: 1) why is installed memory speed lower the spec's? and shat might be preventing the system from seeing more than 4GB of memory?

0 Kudos
12 Replies
osprey4
Diamond

Re: XPS 8500 Memory Problems

Hi Clement703,

You need to be clear on the specs of your system. You can use DDR3 PC3-12800 (aka, DDR3-1600) modules. Can you tell me EXACTLY what new modules you have?

0 Kudos
Clement703
Copper

Re: XPS 8500 Memory Problems

New Memory is Kingston HyperX

KHX1600C9DR/4G - 8GB memory Module / 2x4GB DD3-1600 CLS 240 Pin DIMM

System Info reports 4.00GB DDR3(1600) / Memory manufacture 830B

Configuration for my service tag says I have:

MODULE..., DUAL IN-LINE MEMORY MODULE..., 8GB, 2X4GB, 1600M, N-E

Memory Modules that came with the computer are labeled:

NT4G C85B5HGONF-D1 12317N

8G, 2Rx8, PC-12800-11.10.B0.1600

MM1280109E, XS

MFR - NANYA

MB BIOS reports

Memory Installed                  4096 MB

Memory Available                4032 MB

Memory Running Speed      1600k

Memory Technology              DDR3

Is PC12800 label on the installed module still mean speed is 1600?

There is also a yellow light lit on the motherboard right next to the first memory slot.

0 Kudos
osprey4
Diamond

Re: XPS 8500 Memory Problems

As I said, PC3-12800 = DDR3-1600.

Send them back and get Crucial. Guaranteed to work.

0 Kudos
Zitty99
Copper

Re: XPS 8500 Memory Problems

I want to do the same upgrade, and the memory you used apparently should work.However, the manual says in Page 28 to pair modules in Slots 1-2 and 3-4 (they do interleave physically). Could that be the issue?

0 Kudos
Clement703
Copper

Re: XPS 8500 Memory Problems

The slots actually pair up as 1 & 2 then 3 & 4.  But physically on the motherboard they are the 1st & 3rd slot and the 2nd & 4th slot.  The issue is which slot is number one?  I assumed it was the one closest to the edge of the motherboard and installed the memory accordingly.  But apparently it is the other way.  When I switched slots I can get back to 8GB. So I assume the problem is a mismatch in some spec of the two different modules.  I have ordered four matching modules and will try again.

0 Kudos
osprey4
Diamond

Re: XPS 8500 Memory Problems

From the slot closest to the processor, the slots are 3-1-4-2. First matching pair goes in 1-2 and second matching pair in 3-4.

0 Kudos
Clement703
Copper

Re: XPS 8500 Memory Problems

I purchased four matched Crucial 4GB Modules. After much trial and error, I finally narrowed down the issue. The problem is with slot #1. I tried virtually every option of installing the four modules. When ever there was a module in Slot #1, the computer would not boot. So I have ended up with a module in slots #2, 3 & 4  and 12GB System RAM. When I get the time I'll test Dell's support to see if I can get this fixed...............

0 Kudos
osprey4
Diamond

Re: XPS 8500 Memory Problems

Wow, that's discouraging. Yes, I would definitely ring tech support. You might want to try resetting the CMOS. That sometimes fixes unrecognized RAM.

0 Kudos

Re: XPS 8500 Memory Problems

Hi I stumbled across this forum and wanted to ask a question referenced in one of the posts above.  My XPS 8500 came with 8GB Ram, 4GB each in slots 1 and 2.  I bought 2 more 4GB modules from Crucial.  Since I was having a hard time getting my fingers in the space to put a module in slot 3, I put one in slot 4 first.  At this point that little yellow light on the motherboard just to the right of the memory slots came on.  I then installed the module in slot 3.  The system boots fine, and all performance indexes report the now 16GB total as working fine. 

So I'm wondering what the function of that little yellow light is.  At first I thought it might be an indicator that all slots were full, but it came on when only 3 slots were full, and I hadn't installed the 4th one yet.  Then I thought ti was a fault indicator, but things seem to be working fine.  Can you tell me what this light is for?  

Thanks.

0 Kudos