Question about PNY Optima 1GB PC2-5300 DDR2 SoDIMM Notebook Memory

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Installed 2 - 1 gb ddr2 pc2-5300 667 mhz dual channel memory kit matched pair memory sticks in my imac model 7,1 20 inch computer and it will not boot - I tried using them one at a time and neither worked - so i reinstalled the old ram - why wont the new ram work please and thank you for your time

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  • 55 Answers

I'm afraid it has to do with Apple's firmware on iMacs. A compatible 3rd party memory dealer is RAMJET.
From their website, you can see:
Apple Computers have proven too demanding for generic PC memory modules. Apple users have been forced to either pay Apple's high prices for upgrades, or buy 3rd party modules and be subjected to system crashes, boot failures, and sub-par performance. Worse still, most 3rd party vendors had no idea that Apple machines demanded a higher standard.
At Ramjet, we start with modules built 100% to Apple's original specifications, but we don't stop there. In our compatibility center, we have a comprehensive array of Apples, every platform built since 1996. Other memory companies try to test for Apple compatibility using generic RAM module testers, whereas we test our RAM in the same Mac you're upgrading.

Posted on Mar 13, 2011

Testimonial: "Thanks for the insight - who knew?! I will go to Ramjet for memory from now on!"

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Gateway desktop fx 7026 memory issue, has 4 slots came with( 2 )2 gb sticks = 4 gigs it came with. when i add 2 extra gig it doesnt recognize.


the specs i read says 8 gig is the max. here is what it says for RAM
RAM
  • Installed Size 4.0 GB / 8.0 GB (max)
  • Technology DDR2 SDRAM
  • Memory Speed 667.0 MHz
  • Form Factor DIMM 240-pin
  • Features Dual channel memory architecture
  • Configuration Features 2 x 2 GB

check to make sure you have added the right type of memory. also look at your user manual. it should tell you where and how to place the added sticks. sometimes they have to be added in pairs or have to be in specific slots. also if you dont have the manual it is on the gateway site. you should type in your model and serial number and get all the info you need.

Feb 12, 2011 | Gateway FX7026 PC Desktop

1 Answer

Can i put ram from packard bell easynote into an acer aspire 5315.thanks


RAM / Max RAM Up to 1 GB of DDR2 533 MHz memory, upgradeable to
2 GB using two soDIMM modules (dual-channel support) RAM / Max RAM Up to 1 GB of DDR2 533 MHz memory, upgradeable to
2 GB using two soDIMM modules (dual-channel support) RAM / Max RAM Up to 1 GB of DDR2 533 MHz memory, upgradeable to
2 GB using two soDIMM modules (dual-channel support) RAM / Max RAM Up to 1 GB of DDR2 533 MHz memory, upgradeable to
2 GB using two soDIMM modules (dual-channel support)Max RAM: Up to 1 GB of DDR2 533 MHz memory, upgradeable to
2 GB using two soDIMM modules (dual-channel support) This is the kind of memory you need, no matters the branch

Dec 21, 2010 | Acer Aspire 5315 Notebook

1 Answer

Acer aspire m5100, AMD Athlon 64bit x2 dual core processor 5000+ 2.60Ghz. Win Vista Business 64bit. When i upgrade and put more than 3GB of ram into the machine, it turns off the lan and my display driver...


Acer official site says:-
Up to 4 GB DDR2 533/667/800 MHz SDRAM
(dual-channel support on four DIMMs)

Try these bus speeds and for dual-channel support read this article :-

Dual-channel architecture requires a dual-channel-capable motherboard and two or more DDR, DDR2 SDRAM, or DDR3 SDRAM memory modules. The memory modules are installed into matching banks, which are usually color coded on the motherboard. These separate channels allow each memory module access to the memory controller, increasing throughput bandwidth. It is not required that identical modules be used, but this is often recommended for best dual-channel operation. It is possible to use a single-sided module of 512 MB and a double-sided module of 512 MB in dual-channel configuration, but how fast and stable it is depends on the memory controller.

If the motherboard has two pairs of differently colored DIMM sockets (the colors indicate which bank they belong to, bank 0 or bank 1), then one can place a matched pair of memory modules in bank 0, but a different-capacity pair of modules in bank 1, as long as they are of the same speed. Using this scheme, a pair of 1 GB memory modules in bank 0 and a pair of matched 512 MB modules in bank 1 would be acceptable for dual-channel operation.

Modules rated at different speeds can be run in dual-channel mode, although the motherboard will then run all memory modules at the speed of the slowest module. Some motherboards, however, have compatibility issues with certain brands or models of memory when attempting to use them in dual-channel mode. For this reason, it is generally advised to use identical pairs of memory modules, which is why most memory manufacturers now sell "kits" of matched-pair DIMMs. Several motherboard manufacturers only support configurations where a "matched pair" of modules are used. A matching pair needs to match in.

Good luck

Rate the solution if got help

Dec 06, 2010 | Acer Aspire M5100 AM5100-U5313A AMD...

1 Answer

I have Acer Aspire-5570-4765 laptop with Intel Core Duo Processor T2050 (1.60GHz, 533 MHz FSB, 2MB L2Cache) & 1 GB DDR2 (support dual channel) RAM memory. I want to upgrade RAM my memory from 1GB...


512 MB of DDR2 533 MHz system memory, upgradeable to 2 GB using two soDIMM modules (dual-channel support)

Yes its possible
Yes but the memory its going to run at slow speed 533Mhz

Sep 26, 2010 | Computers & Internet

2 Answers

I have Acer laptop Aspire 5570z module Zr1 with memory 1GB I want to increase memory 2GB or 3GB Is it possible or not What will be the expenditure?


Your laptop's RAM is upgradeable to up to 4 GB using two DDR2 533/667 MHz SODIMM modules.

So your upgrade options here are:
1. Buy a 1 GB DDR2 533/667 MHz SODIMM module & install it to get a total RAM of 2 GB (Price around US$ 25).
2. Buy a 2 GB DDR2 533/667 MHz SODIMM module & install it to get a total RAM of 3 GB (Price around US$ 45).

Aug 14, 2010 | Acer Aspire 5500 5570-2609 Laptop

2 Answers

Is there any problem if i install a single 2gb memory at one slot on my acer aspire 4315?


max ram per slot is 1gb, for 2GB total. A 2 GB module will not work

http://www.crucial.com/store/listparts.aspx?model=Aspire%204315

Apr 03, 2010 | Acer Aspire 4315 Notebook

1 Answer

Upgrade problems


Your system comes stock with one stick of DDR2 (512 MB), which means that it is _ not_ dual channel DDR2 memory as dual channel DDR2 must be installed in matched pairs. Try to exchange the new memory for 2G of some single channel DDR2.

Jan 28, 2009 | eMachines W3507 PC Desktop

6 Answers

RAM NOT DETECTING


I had the same issue on this board where it came with a Samsung 512 MB 533 MHz PC2-4200 DDR2 DIMM. I put in a 1 GB Kingston with the same specs (533 MHz PC2-4200 DDR2) and it would not recongize the Samsung anymore with the system reading as 1 GB of RAM instead of 1.5 GB. Tried every configuration and would only see the Kingston. It would only see the Samsung if I pulled out the Kingston regarless of the slots I use. So, I just bought the exact same make/model of Kingston and it recognized that fine and the system now has 2 GB of memory (max this board allows). And, I had already installed the latest BIOS for this board from Intel before doing all this so wasn't an old BIOS. I'm figuring the board didn't like something about the Samsung memory (speed, module configuration, etc.) that made it not play nice with the Kingston. If interested I bought the DM8400A/1G Kingston modules. And, this board appears not to support dual channel memory. Only has channel A, slots 0 and 1, and I read need two channels to support dual channel (seems obvious). Boards that supports dual channel memory normally have 4 memory slots, two for channel A and two for channel B, then put in matching modules in slot 0 for channel A and B and have dual channel memory access. And if want more ram, then matching modules in slot 1 for channel A and B.

Jun 25, 2008 | Intel D102GGC2 Motherboard

2 Answers

Motherboard Missing instruction manual for dual mode memory


Your instruction manual for the mother board should have this, however, with dual-channel motherboards, you will want to fill the same colored slots together if you have dual-channel capable memory, otherwise you'll want to fill in the off-colored slots first.  ASUS has it's manuals online, so if you've lost yours you should be able to download a pdf of it from their website.

Nov 09, 2007 | ASUS A7V8X Motherboard

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