XPS 1640 max ram supported

I have a 1640, not a 1645/1647 and the ram you linked is not compatible. Why is too low? The actual modules are the same: 8500 at 1066Mhz. You linked a 1333Mhz not compatible with 1640

The blinking lights say the ram is bad. Therefore it is not compatible.

Faster Ram is rarely and issue but too slow ram is always an issue.

All lights blinking means Bad Ram.

Corsair Memory CM3X4GSD1066 4 GB PC3-8500 1066Mhz 204-pin DDR3 SODIMM is not listed as

compatible with Studio XPS 16 (1645), Studio XPS 16 (1647)

The ram is TOO SLOW

PC3-10666 DDR3-1333 204pin SDRAM SODIMM is the recommended ram.

	4GB Dell Precision Mobile Workstation/Studio PC3-10600 DDR3-1333 204-pin SODIMM (p/n DELL-4GB-DDR3-1333S) $44.98

same issue here, got corsair ram of the same specs and it is doing the 3 blinking light thing. the other guys response is a bit rude, but may be correct. Im upgrading my bios just in case, but i think its the ram.

Hi theRise,

Three lights (Mute, volume down, volume up) blinking indicate the system board is faulty.

I recommend to run the diagnostics on the computer (press and hold the Fn and power button to run the diagnostics) and let me know if any error message pops up.

I request you to private message system service tag number, Owners name and contact number. To private message, accept my friend request; click on my user name and click start conversation.

Awaiting your response!

I replied to you directly and sent you a request as a contact but did not see your request.

I ran the diagnostics with the old ram and everything was fine. I have already returned the 'new' ram. I ordered some ram that i read another user had ordered and used successfully in the forums. That will arrive tomorrow and I will report the results. PNY MN8192KD3-1066 (www.amazon.com/.../ref=sr_1_1)

Hi theRise,

I have received your request, probably some technical glitch therefore message was not delivered on time.

I shall wait for the status after you replace the new memory, which would arrive tomorrow.

The new memory worked. While both types were labeled as being exactly the same, they clearly were not. I can confirm PNY MN8192KD3-1066 works!

Hi theRise,

Good to know that new memory is working on the computer.

In future for  any compatibility issue or any hardware issues on the computer, I recommend Dell PC checkup diagnostics from below link:

www.dell.com/.../19

It was a pleasure working with you

Thanks for posting this! I had had the same problem with the Corsair and picked this PNY model to see how would it go on my Studio XPS 1640. Just installed it and it's working for me too!