I took the plunge and bought these sticks of RAM on the off chance they would work. Amazingly they did actually work a treat so this RAM was cheap as chips at 5GBP each :) The computer now runs a treat with 3GB of RAM. Plenty for anything my daughter needs to do with this machine.
Actually SpeedStep its now running 2 x 512mb sticks of pc4200 alongside the 2 x 1gb sticks of pc6400 with no problems thus far. Thanks for your reply though.
sir/madam we are in deep trouble because we have a Dell CPU model : OPTIPLEX GX620 which is not working since 6 months (Not booting) ... serial number: <ADMIN NOTE: Serial number removed per privacy policy> eleven digit service number : <ADMIN NOTE: Service number removed per privacy policy>
we tried to get it service done but we failed because every time we call the service number they keep transferring the call to other person...
our system is not in warranty so we will pay for service..
please help us by providing us a service engineer ,so that we can perform our research and diagnostic work....
research is very urgent
Regards Dr Maikal kujur, doctor ( mobile number <ADMIN NOTE: mobile number removed per privacy policy>
@maikal - Read this thread and then inspect the motherboard on your GX620 for damaged capacitors. If you find any, the motherboard will have to be replaced...
PC6400 is more than fast enough (I don't think the chipset will run faster than PC5300 speeds.
Ideally, you want to install memory in matched pairs, so I would suggest you buy 4x the 1 GBP RAM sticks and not use the PC4200 stick currently in the system (the PC6400 RAM will be throttled back to that slower speed if you were to add one or three faster pieces to the system... You may not care, but at such a low price I'd try for that little performance edge with faster memory.)
As an option, many are reporting these systems can support up to 8 gigs of RAM, though not formally supported by Dell, so if you find a good deal on 2 Gig DDR2 RAM that may be an option (but 4 Gigs for 20 GBP is most likely sufficient).
I bought 2- 2GB sticks of DDR2 PC-6400 non-ECC to upgrade my GX620 Ultra Compact (only 2 memory slots) running Windows 7 Ultimate 64bit. Was terribly slow with only 1GB installed.
After installing the 4GB RAM, it wouldn't boot up. Tried removing one stick...still didn't work.
I was going to update the Bios to A11 as recommended but I've read that some users have had boot problems after updating to Bios. I have the original 1GB RAM installed (2-512 sticks).
Should I be able to update to A11 successfully or will having Windows 7 Ultimate 64bit going to give me a problem?
I discovered my computer (bought used) had already been upgraded to latest BIOS A11.
So with A11 update I should be able to install upgrade to 4GB RAM (2-2GB). I will return the KomputerBay RAM and try the Crucial memory and hope that it works OK.
speedstep
9 Legend
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47K Posts
0
May 26th, 2012 16:00
Dell-India | Facebook
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- The names and versions of installed operating systems; the operating
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Listen carefully and follow the technician's suggestions.
Tell the technician exactly what happens when you perform the suggested task.
speedstep
9 Legend
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47K Posts
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May 17th, 2012 11:00
PC4200 is TOO SLOW for a GX620.
The ram must NOT BE ECC and Must Be Low Density INTEL Chipset Compatable Ram.
8 Gigs is Max with 64 bit CPU and OS.
Recommended Upgrade
DDR2 PC2-5300 • CL=5 • Unbuffered • NON-ECC • DDR2-667 • 1.8V • 256Meg x 64 • • Part #: CT519120
(MHz)
(ns)
(MHz)
(MT/s)
(MB/s)
(CL-tRCD-tRP)
(ns)
DDR2-400C
4-4-4
20
DDR2-533C
4-4-4
15
DDR2-667D
5-5-5
15
DDR2-800D
DDR2-800E
5-5-5
6-6-6
12½
15
DDR2-1066F
7-7-7
13⅛
smithyj
3 Posts
0
May 23rd, 2012 05:00
I took the plunge and bought these sticks of RAM on the off chance they would work. Amazingly they did actually work a treat so this RAM was cheap as chips at 5GBP each :) The computer now runs a treat with 3GB of RAM. Plenty for anything my daughter needs to do with this machine.
speedstep
9 Legend
•
47K Posts
0
May 24th, 2012 13:00
PC2 6400 ram is fine. PC2 4200 is not. Glad to hear it worked out.
smithyj
3 Posts
0
May 25th, 2012 05:00
Actually SpeedStep its now running 2 x 512mb sticks of pc4200 alongside the 2 x 1gb sticks of pc6400 with no problems thus far. Thanks for your reply though.
maikal
1 Message
0
May 25th, 2012 09:00
<ADMIN NOTE: Address removed per privacy policy>
Davet50
4 Operator
•
14.4K Posts
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May 25th, 2012 13:00
maikal
This is a user to user forum so we cannot help you out. I have reached out to some contact to see if we can get you some help
RoHe
10 Elder
•
45.2K Posts
0
May 25th, 2012 19:00
@maikal - Read this thread and then inspect the motherboard on your GX620 for damaged capacitors. If you find any, the motherboard will have to be replaced...
Ken08534
4 Posts
0
October 5th, 2012 08:00
PC6400 is more than fast enough (I don't think the chipset will run faster than PC5300 speeds.
Ideally, you want to install memory in matched pairs, so I would suggest you buy 4x the 1 GBP RAM sticks and not use the PC4200 stick currently in the system (the PC6400 RAM will be throttled back to that slower speed if you were to add one or three faster pieces to the system... You may not care, but at such a low price I'd try for that little performance edge with faster memory.)
As an option, many are reporting these systems can support up to 8 gigs of RAM, though not formally supported by Dell, so if you find a good deal on 2 Gig DDR2 RAM that may be an option (but 4 Gigs for 20 GBP is most likely sufficient).
bfauch
5 Posts
0
September 17th, 2013 07:00
SpeedStep,
I bought 2- 2GB sticks of DDR2 PC-6400 non-ECC to upgrade my GX620 Ultra Compact (only 2 memory slots) running Windows 7 Ultimate 64bit. Was terribly slow with only 1GB installed.
After installing the 4GB RAM, it wouldn't boot up. Tried removing one stick...still didn't work.
Any idea what is my problem???
Thx
speedstep
9 Legend
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47K Posts
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September 17th, 2013 08:00
Update the bios to A11. 3.5 Gigs is max regardless of how much is installed.
Ram MUST BE LOW Density INTEL compatable Ram. 2 Gig Dimms do not usually work at all or Post until the bios is updated.
�
bfauch
5 Posts
0
September 18th, 2013 05:00
The RAM sticks I bought are labelled 2GB PC-6300/6400 DDR2 800Mhz 2048MB Non ECC.
They are Komputer Bay matched sticks.
How do I know if they are low density Intel compatible?
You said 2GB Dimms don't usually work at all.
What specific type memory upgrade do you recommend that can give me max of 3.5GB for my 2 slots? Thx.
speedstep
9 Legend
•
47K Posts
0
September 18th, 2013 10:00
BIOS UPDATE REQUIRED for 2 Gig Dimms
http://www.crucial.com/upgrade/Dell-memory/OptiPlex/OptiPlex+GX620+Series+%28Desktop,+Mini-Tower,+and+Small+Form+Factor%29-upgrades.html
bfauch
5 Posts
0
September 18th, 2013 21:00
Thank-you SpeedStep!
I was going to update the Bios to A11 as recommended but I've read that some users have had boot problems after updating to Bios. I have the original 1GB RAM installed (2-512 sticks).
Should I be able to update to A11 successfully or will having Windows 7 Ultimate 64bit going to give me a problem?
bfauch
5 Posts
0
September 18th, 2013 22:00
I discovered my computer (bought used) had already been upgraded to latest BIOS A11.
So with A11 update I should be able to install upgrade to 4GB RAM (2-2GB). I will return the KomputerBay RAM and try the Crucial memory and hope that it works OK.
BF