Re: How do I get 3gigs out of 3gigs worth of chips?
- From: Ben Myers <ben_myers@xxxxxxxxxxx>
- Date: Sun, 12 Dec 2010 12:42:29 -0500
On 12/12/2010 3:21 AM, mm wrote:
BTW, the four lights on the back of the computer are all green.
And all the chips are well installed. The first 3 go Click when the
bottom part is pushed in, and again Click when the top spot is pushed
in. The fourth one never does that -- it just pushes in slowly -- but
for all four DIMMs the levers at each end are all the way up, so that
the "prong" on the top of each one is in the notch at the end of the
DIMM.
And I redid the 2nd, 3rd, and 4th setup in the details below, and got
the same results. With slot 1 showing 512 when a couple minutes
earlier it showed 1024 and I didnt' move it in between. and with slot
3 showing as empty even though that's one that clicked into place at
both ends, pushing the levers at the ends up, into the notches.
It always boots and it always runs, with whatever configuration I've
used.
And the board is rated for 4 gigs, a gig in each slot, and indeed,
with oonly two 1-gig chips, it shows 2 gigs. Addign the 512 makes one
of the gigs show up as 512!
Also, DDR1 and 2 have white levers, DDR3 and 4 have black levers.
Right?
The manual, which I think was wrong when it clearly implied all 4600
have hyper-threading, says:
Architecture Dual Channel DDR SDRAM ^^^
Memory connectors Four
Memory capacities 128-, 256-, 512-MB or 1-GB
Minimum memory 128-MB DDR SDRAM
NOTE: Between 32 and 64 MB of system memory may be
allocated to support graphics, depending on system memory size
and other factors.
Maximum memory 4 GB [4 gigs!!!]
Memory type PC2700 (333-MHz) or PC3200 (400-MHz) DDR
SDRAM (non-ECC)
^^^ Here it says dual, but in the Bios it says:
"System Memory Channel Single". So how can I get dual?
On Sun, 12 Dec 2010 00:34:09 -0500, mm<NOPSAMmm2005@xxxxxxxxxxx>
wrote:
How do I get 3gigs out of 3gigs worth of chips?
When all 4 slots are full, it always shows one slot as empty, and a
second slot as 512 instead of 1 gig!! It varies which slots those
are.
Hi, me again. With my friend's Dell 4600, running an almost fresh
install of XP Pro. The BIOS, under Memory Information, shows what I
have at the bottom.^^
It had two 512Kb DDRs in its 4 slots, and I decided I wanted more
memory.
I bought 2 1G DDRs****, and put them, without removing the ones that
were there, in the empty slots, the second bank, bank 1, but it showed
only 2GB total, not 3G like one would expect.
For one thing, with all four slots filled, with 512 in 1 and 2 and 1G
in 3 and 4, slot 3 showed 512 and slot 4 showed empty. With a later
arrangement slot 3 showed empty.
So I rearranged them so the bigger ones were in the DDR1 and 3, and
the old ones were in DDR2 and 4. No change in the total!!
At every step, I ran Memtest86** and usually Belarc Advisor for more
info than just the total. They always agreed.
**Option c (configuration) / option 5 (Show DMI Memory Information -
by slot)
(Columns below are written for fixed-width fonts. In Agent, with
default font settings, clicking on Reply changes the font from
variable-width to fixed width.)
So I started at the beginning, starting with one of the new DIMMs and
adding the other one and then each of the olds ones after each ----
line:
| What Memtest and
size slot What shows in Memtest and Belarc| Belarc call the slots
1G DDR1 1024M | Ch A DIMM 0
----
1G 1 1024 A 0
1G 2 1024 Total 2048 B 0
----
1G 1 512 A 0
1G 2 1024 B 0
512 3 empty Total 1536 A 1
----
1G 1 512 A 0
1G 2 1024 B 0
512 3 empty A 1
512 4 512 Total 2048 B 1
However it's not as simple as blaming slot 3 because when I first did
this, with 512 in 1 and 2 and 1G in 3 and 4, slot 3 showed 512 and
slot 4 showed empty.
The first two levels of installing DIMMS seem to make clear that DDR1
is Ch A, DIMM 0; and DDR2 is Ch B, DIMM 0; and the others follow
logically from that, but I still see this as a possible source of part
of my confusion.
I ran Memtest through two full passes for the two 1G chips and they
had no errors.
I ran Memtest through two full passes for the two 512M chips and they
had no errors.
I didn't think it was worth running Memtest with all 4 chips in place,
because it always shows one slot as empty, and a second slot as 512
instead of 1 gig.
Are all my DIMMs good?
What should I do to get 3 Gigs to show up?
Is it true that XP can't recognize more than 3.5 gigs, and sometimes
not more than 3? Regardless, I still want my 3!
**** P.S.
My old DIMMs are Dell factory Hynix 512M DDR 333 CL2.5 pc2700, and
my new DIMMs are used Crucial 1GB DDR 333 CL2.5 pc2700u-25331-z
^^I can't change any of these, except the last:
Installed System Memory, various values
but never more than 2048M DDR SDRAM.
System Memory Speed 333 MHz
System Memory Channel Single
AGP Aperture 128M
(Could change it to 32, 64, or 256)
Thanks for any help you can give me!
With 4th DIMM socket not clicking firmly when a DIMM is installed, I suspect a defective socket is the problem.
3GB is excellent for XP, especially for photo editing and any app using very large data sets. No point in going above 3GB due to P4 architecture and 32-bit addressing limitations... Ben Myers
.
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