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Windows 7: [Major Problem] Attempted to add additional RAM, but fail to startup.

12 May 2011   #21

Windows 7 Home Premium 64 bit

I agree with dsperber 100 %, even with 3.5 gb's of ram it's running at the slowest ram which is the 512 gb stick. It may not even be utilizing the 800 mhz ram that the E520 doesn't support.

My System SpecsSystem Spec
12 May 2011   #22
Layback Bear

Windows 10 Pro. 64/ version 1709

To the OP. The slower stick of ram slowed all the other ram stick and that is why in worked and also kept it in dual channel. Take the advice of dsperber and be happy. If nothing else you have been shown how handy having the manual and knowing the specs can be.
My System SpecsSystem Spec
14 May 2011   #23

Windows 7 Ultimate 64-Bit

Quote   Quote: Originally Posted by dsperber View Post
Quote   Quote: Originally Posted by duongducminh View Post
when i bought it 2nd hand, yes i installed my own RAM.
Well apparently it's been working, with three out of four slots filled with three identical 1GB 800Mhz memory cards and the remaining fourth slot holding what I guess is a 512MB 553Mhz (or a bit slower?) memory card.

However as I understand things, all of the memory would be SLOWED DOWN BY THE BIOS to conform to the slowest memory present. So I don't think you've been getting the performance you'd hoped for with those three "fast" cards. You've actually been getting the performance of those three cards limited by the slowest card, i.e. the 512MB fourth card.

Again, 800Mhz is faster than Dell says the machine can support... although apparently it's physically working. But this may be because you actually have that slow fourth card, so this may be what has "saved" you in the first place. Don't really know, but it's really not right.

My recommendation is to spend $64 and buy this 2x2GB kit from Crucial which is guaranteed to be perfect for your Dell XPS E520, and which will be the proper 667Mhz faster memory that Dell states is supported by your machine.

Remove all four of your current memory cards, and place these two 2GB cards in slots 1 and 2 of the machine. This will give you the 4GB you want, in just two matched memory cards... and at the fastest speed Dell states can be used.

i have 2 questions?

1.In my case, is having 3GB RAM faster than 3.5GB?(i have a feeling that taking my 512mb ram out will be better)
I wouldn't spend much time trying to argue one way or another.

My honest recommendation is to spend $64 and be done with it. Toss your current four memory cards and replace them with the two new ones from Crucial. 4GB is better than either 3.5GB or 3GB. And, your machine's memory will actually be running at the max 667Mhz speed it can run at, rather than the 553Mhz it is currently probably running at because that's the slowest card of your four.

2.When i have 4 RAM slots, but only decide to use 3 slots leaving 1 remaining, is it faster? i heard my friend saying that if i use all slots, then the motherboard uses more effort.
Well.. "more effort" is not really an appropriate description.

But personally I would NEVER not use pairs of matched memory cards in pairs of memory slots. Also, I would fill either 2 or 4 memory slots, and never 3.

As Dell said:
DDR2 Memory Overview

DDR2 memory modules should be installed in pairs of matched memory size, speed, and technology. If the DDR2 memory modules are not installed in matched pairs, the computer will continue to operate, but with a slight reduction in performance.
ok, i understand now. thank you dsperber!, i will take your advice.
thank you so much! and thank you everyone who has helped!
My System SpecsSystem Spec

14 May 2011   #24

Windows 7 Ultimate 64-Bit

btw, i would like to game on this computer, would you guys tell me a decent website that sells cheap graphic cards?
My System SpecsSystem Spec
19 May 2011   #25

Windows 7 x86/x64, Server 2008r2, Web Server 2008

im fond of, other will say
My System SpecsSystem Spec
20 May 2011   #26

Windows 7 Ultimate 64-Bit

Quote   Quote: Originally Posted by mckillwashere View Post
im fond of, other will say
thanks man!
My System SpecsSystem Spec

 [Major Problem] Attempted to add additional RAM, but fail to startup.

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