Computer wont start consistently.

there is no answer to that. no 2 CPUs on earth overclock the same amount nor way.
best is not OC< and learn to just compute and be happy?
old chips sets are 4GB max ram and useable to 3.2GB
the data sheet on your PC, for the north bridge tells you that
it PCI devices, or iGPU can steal RAM from main, to form up. vRAM
it even says the word steals. (intel pages)

find OC forum real and read. 1billion words to nowhere fast.
have fun with BSOD , endless. and random or hard worked hot.

i would take out all ram , then just put in the 4gig
there is 2 slots for ram
if that is the same then windows may have crashed , try getting into safemode by pressing f8 after bios

Here is a site that has the suggested RAM for your motherboard. And includes the complete spec sheet.
http://www.intel.com/support/motherboards/desktop/dh55tc/sb/CS-030954.htm#tested

The motherboard chipset, and more specifically the Northbridge chip, will Not support 4GB of Ram memory.

The Acer Aspire 5500 series of Notebook PC's, (Which the Aspire 5504wxmi Notebook PC is one of the series), uses an Intel 910GL motherboard chipset,

The Intel 910GL motherboard chipset only supports 2GB of Ram Memory,

http://en.wikipedia.org/wiki/List_of_intel_chipsets#9xx_Chipsets_and_3.2F4_Series_chipsets


Primer:
The motherboard chipset technology used in your Acer Aspire 5504wxmi Notebook PC, consists of a Northbridge chip, and a Southbridge chip.

[ Chip and Chipset are slang terms for I.C.
Integrated Circuit,

http://en.wikipedia.org/wiki/Integrated_circuit

The Northbridge chip is an Intel 82910GL {Part Number}
The Southbridge chip is an Intel 82801FB {Part Number} It is also referred to as ICH6.

Scroll the above page down towards the bottom, until you come to the heading -
Southbridge 9XX and 3/4 Series chipsets, for information on the Southbridge chip ]


The Northbridge chip handles the faster capabilities of a computer.
Processor, Ram Memory, and High-speed graphics.

{AGP and PCI-Express graphics technology are High-speed graphics.
A graphics card inserted into a PCI slot, or a graphics chipset using the PCI bus, is NOT high-speed graphics.
Integrated Graphics is Not High-speed graphics }

The Southbridge chip handles the slower capabilities of a computer.
Anything connected to the PCI bus, Integrated Graphics, IDE bus, SATA bus, USB bus, Ethernet, and Audio,
(Sound)

http://en.wikipedia.org/wiki/File:Motherboard_diagram.svg


I invite you to reinstall the Ram Memory the Aspire worked with, go online, and download the tiny, free program - CPU-Z
This tiny program will tell you exactly what motherboard chipset is on the Aspire's motherboard.

This is information on CPU-Z, and shows you the GUI of CPU-Z,
(Graphics User Interface),

http://en.wikipedia.org/wiki/CPU-Z

Click on the screenshot of CPU-Z on the upper right of the page. (Enlarges it)

CPU stands for Central Processing Unit. Another term used is Microprocessor, or Processor for short.
When you open CPU-Z it automatically opens to the CPU tab.

If you click on the Mainboard tab, you will find out in-depth information on your motherboard.
(Mainboard is proper speak for Motherboard)

CPU-Z homepage,

http://www.cpuid.com/softwares/cpu-z.html

CPU-Z download page for newest version,

http://www.cpuid.com/downloads/cpu-z/1.58-setup-en.exe

Need help in downloading, and installing CPU-Z, post in a Comment.
Also what the tabs are, and how to understand what you are looking at.

Regards,
joecoolvette

(If an online entity suggested an Acer Aspire 5504wxmi will support 4GB of Ram Memory, they are wrong.
Find out what exact motherboard chipset is on the motherboard. This will support my statement )

Test the Ram dimms, one at a time. It sounds like you may have a bad module. Carefully reseat each one. And ground yourself to avoid static electricity.

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

This could simply be an issue with you bios. Flash to the latest bios version.
From the site it looks like the Mars has had some bios issues in the past.
Nice setup btw

You can go to the Alienware website, now owned by Dell so it can also be accessed thru Dell, and under the support section you should be able to find all system specs, compatible upgrades and any manuals you need. Hope this helps & please remember to rate my answer. Thanks.

This are the compatible RAM for this mobo :Support for DDR 400, DDR 333, and DDR 266 and you can upgrade up to 4GIG or RAM this is the complete specs for this mobo http://www.gearxs.com/gearxs/product_info.php?products_id=8076

Hope that helps..........

is the bios set to dispaly using a built in graphics card on the mobo?

have you tried different memory as no matter what the board says they don't like some memory .
also take the board out of the case and connect pwr supply.
cpu and fan ,video card , and 1 memory stick

no cables ,keyboard ,mouse or drives connected.
this is called bread boarding.
reset the bios jumper, then put jumper back.
and power up.