Question about Sony VAIO RB30C (VGCRB30) PC Desktop

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Just curious Hi, Why can't one use just two 1gb chips? Wouldn't the 1gb chips have two 512mb chips ganged together, or aren't the slots in line? I was going to do the same thing after getting a friend's old RB30C. Thanks. Your previous answer : If it has 4 slots and supports 2Gb max with 2 slots currently populated with 2 x 256mb chips you'll need to remove both those chips and install 4 x 512mb chips to reach the max of 2 Gb.

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Surely your system is requiring identical type of chips.the brand and frequency.just do it and surely it will work.

Posted on May 29, 2008

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Emachines T5082 Adding 512Mb ram. Getting slot 0 installed slot 1 not installed.


Try swapping the memory in the two slots. It sounds like either one of the memory chips is bad or one of the memory slots is bad.
If you find that one of the slots is bad, then you might try just putting a 1GB Chip in the slot that works.

Apr 24, 2012 | E-Machines eMachines Desktop PC

2 Answers

214-Dimm Config Warning


Just had same problem. Found a solution:
I have an old HP Compaq dc5000MT. It has 4 RAM slots
Here's what DIDN'T work:
1gb + 1gb + 512mb + 512mb
1gb + 512mb + 512mb + 1gb
512mb + 1gb + 1gb + 512mb
Here's what DID work:
1gb + 512mb + 1gb + 512mb
I'm sure that:
512mb + 1gb + 512mb + 1gb would probably work as well.
From my guess they're are 2 "channels" (slots 1&2 are channel 1, slots 3&4 are channel 2) and you have to keep the amount of RAM balanced on both slots and in the same order.
Another thing to note with the old XP OS. IT ONLY WORKS WITH 3GB or RAM. MAX. So 1 + 1 + 1 + 1 (4gb) WILL NOT WORK... PERIOD for XP. Vista, 7, 8 etc. allows you to use a ton more ram + readyboost. They need all the help they can get though since they are major resource hogs.

Aug 15, 2011 | HP Compaq d530c PC Desktop

1 Answer

Hi guys, i have installed 2 sdrams pc-133 512mb,together 1gb, but yhe bios and the system shows me only the half memory,whyyyyyyyy


Are you sure that both sticks of RAM are properly "seated"?

How much memory is found when only one stick is used?
How much memory is found when only the other stick is used?

Which motherboard? Some very-old motherboards only support a maximum of 256MB per slot.

How many memory-chips are on each stick of RAM?
If you have purchased "high-density" memory (small number of memory-chips),
and your motherboard only supports "low-density" memory, then only 1/2 or 1/4 of the actual RAM will be used.

Feb 17, 2011 | DFI CA63-EC Motherboard

1 Answer

About my ram of p4m800-m7 rev 3.1 i have a 512mb ram already installed and i buy a new ram with a 1gb size and i would like to install it but my question is is it okay to put them together? my 512mb ram is...


The black rectangular chips on the side, or sides, of the ram module are DRAM chips. Dynamic Random Access Memory.

('Chip' is slang term to denote IC, or Integrated Circuit)

Each Dram chip is of a specific size, (or can be said as Amount)
There are manufacturers who make the Dram chips, and then the chips are used by the ram memory manufacturer.

Doesn't matter how the Dram chips are arranged. The ram memory manufacturer could put them all of one side, if they designed it that way.

1.Your motherboard will support, (Use), DDR at 333Mhz, or DDR at 400MegaHertz.
(PC2700 and PC3200, respectively)

2.The ram memory module must use 2.5 Volts.
(JEDEC has set the voltage standard for DDR Sdram at 2.5 Volts, so no worries here. Only time to check this, is if you have some High performance ram, that may be set to use a higher voltage)

3.It must be Non-ECC ram, and Unbuffered.

4.Cas Latency should be 2.5 to 3.0 (Ram Timings)

Short solution?

Computer off, and unplugged from power. TOUCH the metal frame of the computer case to relieve your body of Static.

Handle the ram 'sticks' by the body of the stick, and refrain from touching the gold plated contact pins, on the bottom.

If the 512MB stick is in SLOT 1, remove it. Install the 1GB stick in Slot 1. Make SURE it is seated!

(Slot 1, is the ram memory slot that is closest to the Processor. It is the first ram memory slot that the Processor reads)

Leave the computer case open. (Refrain from putting your hands in while the computer is plugged into power)

Plug the computer into power. Wait 30 seconds. Turn the computer on.

Computer boots up? (Starts)
Okay.
Unplug from power. Install the 512MB stick in Slot 2.
Plug into power, wait 30 seconds. Turn the computer on.
Computer boots up?
You're good to go.

1GB ram memory stick is in Slot 1, and the computer does not boot up?
Incompatible ram memory. Remove it. Reinstall the original 512MB stick in Slot 1.

Nov 26, 2009 | EliteGroup P4M800-M7 Motherboard

3 Answers

Can I add 1GB memory chip in 2nd slot with a 512MB chip in 1st?


You can upgrade by inserting a 1GB PC2100 DDR SDRAM DIMM. I would put the 1MB in the first slot and move the 512MB chip to the second slot.
The 1GB should cost around $40.

Jul 05, 2009 | HP Pavilion 763n PC Desktop

1 Answer

Adding memory, new total not recognized: IBM Thinkpad R51e-1844


Ram should always be paired. Same type, speed and size in each slot. You may have 1 SIMM/DIMM/DDR that has 2 sides of chips and the other with 1 which will do exactly what you state. RAM reads across the chips simultaneously. So if you have a different one in each slot it can go bonkers and do goofy stuff on you.

Jun 14, 2009 | IBM ThinkPad R51 Notebook

3 Answers

IBM ThinkPad T40 2GB Max RAM


The T40 has two ram slots, you can put a 1g chip in each totaling 2g. If the chip will remove, then it is changeable. Vista needs a minimum of 256 to run, so, when you change BOTH chips to equal 2g it will probably read 1.744g, or it may read the full 2g. If it only reads 1g, then the second slot under keyboard may have malfunctioned. It could also be that the 256 chip is bad and your really only running 512 now. With all that said, in order to achieve 2g, you will need to put a 1g chip in each slot.

Jul 08, 2008 | IBM ThinkPad T40 2373 Notebook

3 Answers

RAM problem


Hello, if you have an intel m processor for your sony then u are somewaht out of luck. the base memory is 256 megs and it is not in the motherboard but rather integrated in one of the slots itself, that means if u put a 512 mb chip into that certain slot it will only read 256. a lot of people are mislead into thinking they can put two 512s and get a gig of memory, but not true, at least not with most of the sony intel processors. find the base slot by switching chips around, then leave the 256mb chip there. then u can add a 512mb to the expandable slot and get over 700bytes. if u can find a 1gb compatible stick,then try that the same way, leave the original hynix base slot chip in and add the 1gb, if u can find one, then u will have a little over 1280 of which u can up the video graphic usage up to 128 in the bios, and have your 1gb in memory. if u find a 1gb memory chip that work,drop a line as to what brand and size u used

Jun 22, 2008 | Sony VAIO K45 Notebook

1 Answer

Memory installation


It really should be able to. The only thing I can think of would be that the board just feels like being picky about what you put in it. Wait... are the chips all the same speed? If not put the slower ones in pair 1 (which I guess is purple) and the higher speed in pair 2. If you have it the other way, sometimes the system won't even out the speeds for all the chips and one chip (or in this case, pair of chips) will overheat because the board forces it to run faster than it should. But if that doesn't work, I really have no choice but to admit defeat, because unless the board is bad (which it isn't, since if you take one pair out, it works) it makes no sense.

Apr 10, 2008 | Acer Aspire™ T180 PC Desktop

3 Answers

Upgrade from 512MB to 1GB


The specs on the memory are correct, so you purchased the correct type of memory for this motherboard. If your getting no video when you power on with the 1gb stick, I would be willing to bet the 1gb stick is bad. Can you return it and try another stick?

Mar 15, 2008 | ASUS P4B266 Motherboard

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