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XPS 400 not recognizing all RAM

I have a Dell XPS 400 that I'm installing Win 7 64 bit on...
It has the capacity to handle 8 Gb of RAM...
I have 4 - 2 Gb Cruicial sticks, PC5300...
The puter has 4 slots, 2 white tabbed and 2 black tabbed...

I can put any 2 of the 4 sticks in either the white or black tabbed slots and the computer will boot...

I can put one of any of the 4 sticks in any slot and the comptuer will boot...

I cannot put in either any 3 or any 4 of the sticks...the screen will show the
white bar moving across left to right and it will say "Windows is loading files"...then it stops...

So, I can get a maximum of 4 Gb in this machine and it will work...any 2 sticks, in either white or black tabbed slots...

With all 4 sticks installed...BIOS shows that 8 Gb is installed...but it won't boot...



So...because any combination of the 4 sticks will work, either singular or in pairs, I have to assume the sticks are good...

And I can put either one or two sticks in either of the white or black tabbed slots, which indicates the MB is good and BIOS is recognizing whatever I install...

And, whenever I change the RAM, it POSTS with "Memory has changed, F1 to continue or F2 for setup"...I hit F1 and it continues to boot...

Thoughts, ideas, suggestions???

Anything is appreciated...

Steve
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stevem5000
Asked:
stevem5000
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1 Solution
 
athomsfereCommented:
Max memory for the XPS 400 was 4GB, or 1GB each slot.

http://www.support.dell.com/support/edocs/systems/xps400/sm/specs.htm#wp1053343

About typical for a mid-high end machine in 05-06.
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stevem5000Author Commented:
Well...you may be correct...

I went looking on the Dell site beforehand but didn't find what you got...

But I found this...I found this, so that's what I went on...
http://www.memorystock.com/memory/DellXPS400.html
http://www.dellmemoryram.com/dell-computer-ram/DellXPS400.html

Oh well...back to the drawing board...

Many thanx...Appreciate the help...

Steve
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athomsfereCommented:
In the future, you can also use Crucial: http://www.crucial.com/store/listparts.aspx?model=XPS%20400

If you buy from them, they guarantee it is compatible and their information accurate if you use their tool to buy
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conalbCommented:
Steve,
the XPS400 has an Intel 945P chipset which is limited to 4GB memory.

See http://www.intel.com/products/desktop/chipsets/945p/945p-overview.htm


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stevem5000Author Commented:
Thanx guys...

Now I have 2 extra sticks of PC5300...

Guess I need a MB that supports 8 Gb of PC5300...

Any ideas???...maybe another MB from a Dell that fits in that case....???

But you know...the specs say 1 Gb max per slot...and I have 2 Gb in each of 2 slots...
Of course...doesn't mean anything now...

thanx for your imput...
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conalbCommented:
Unless you actually need 8GB memory, I wouldn't bother upgrading the motherboard as you would be looking at a new CPU as well. Best bet is to sell the extra ram on ebay.
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stevem5000Author Commented:
I've got another box I built that will run 8gb of ram...a mid level C2D...

I need to load Win 7 64 on that box and I can use the RAM there...

thanx guys...
Appreciate the help...
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