Question about PC Chips A21G Motherboard

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Must I use 2 DDR memories for this dual channel DDR motherboard?

This motherboard has the memory dual channel feature and only has 2 memory slots. Right now I am using just one with 521 but I can not start the system. Should I use the 2 slots with the same size memory?

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Hi, Your system would run better with 2 equal RAM chips but will also run well enough on one. the main reason for a system not to boot is that the Ram is not fitted properly or in the Wrong dimm slot. Use a torch and see which slot is marked as dimm1, this is usualy the one nearest the CPU.
If this does not work then test the RAM in another computer, it may be faulty.

Posted on Nov 17, 2007


Yes use 2 memory

Posted on Nov 17, 2007


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I have intel 915 GLV mother board and 256mb ram, now i want to upgrade my ram to 1GB. please let me knw what kind of RAM i need to buy along with its image details.

Intel Desktop Board D915GLVG - motherboard - micro ATX - LGA775 Socket
Max Supported Memory 4 GB Supported RAM Technology DDR SDRAM Supported RAM Speed 400 MHz, 333 MHz Supported RAM (Registered or Buffered) Unbuffered RAM Features Dual channel memory architecture

Max Supported Memory 4 GB Supported RAM Technology DDR SDRAM Supported RAM Speed 400 MHz, 333 MHz Supported RAM (Registered or Buffered) Unbuffered RAM Features Dual channel memory architecture

Aug 10, 2011 | Intel D915GLVG Motherboard

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HP Pavilion Media Center PC not detecting memory in slots 3 & 4.All memory works in slots 1 &2.Memory is all the same.

Info from the manual:

Memory configurations

You can install 128 MB, 256 MB, 512 MB, and 1GB DDR SDRAM DIMMs into the DIMM sockets using the memory configurations in this section.

• Install only identical (the same type and size) DDR DIMM pairs

using the recommended configurations.

• Make sure that the memory frequency matches the CPU FSB

(Front Side Bus). Refer to the Memory frequency/CPU FSB

synchronization table on the next page.

• This motherboard does not support double-sided 16-bit DDR DIMMs.

• Do not create a three-DIMM configuration in dual-channel mode. The
third DIMM is ignored in the dual-channel operation.

Recommended memory configurations

Memory frequency/CPU FSB synchronization

* Use only identical DDR DIMM pairs.



Single-channel (1) Installed - - -

(2) - Installed - -

(3) - - Installed -

(4) - - - Installed

Dual-channel* (1) Installed - Installed -

(2) - Installed - Installed

(3) Installed Installed Installed Installed

CPU FSB DDR DIMM Type Memory Frequency

800 MHz PC3200 400 MHz
533 MHz PC3200/PC2700 400/333 MHz

Feb 18, 2011 | ASUS PTGD-LA Motherboard

2 Answers

I wish to add RAM in the PC. Mine motherboard-Epox-EP-4BDA533(I). ID(identification)-05/09/2003-i845d-6A69VPA8C-00. On it costs RAM 256Mb -DDR PC2100 266Mg FSB-400Mg. How many Mb it is possible to add....

Manufacturer Specifications - EPoX EP-4BDA533I Number of Slots:
Slot 1
Slot 2
Each memory slot can hold DDR PC2700,DDR PC3200 with a maximum of 1GB per slot.*
*Not to exceed manufacturer supported memory.
  • 184-pin DIMM Banking: 2 (2 banks of 1)
  • Chipset: Intel 845D
  • Error Detection Support: ECC and non-ECC
  • Graphics Support: AGP 4X
  • Max Component Density: 512Mb
  • Max Unbuffered DDR SDRAM: 2048MB
  • Module Types Supported: Unbuffered only
  • Supported DRAM Types: DDR SDRAM only
  • USB Support: 1.x Compliant
Q: What memory goes into my computer, and will a faster speed be backward-compatible?
A: DDR memory with support for DDR PC2700,DDR PC3200 speeds.
Because DDR memory is backward-compatible, you can safely upgrade your system with any of the guaranteed-compatible DDR speeds listed below, even if your manual calls for PC1600 or PC2100 speeds.
Q: How much memory can my computer handle?
A: 2048MB.
Adding the maximum amount of memory will improve performance and help extend the useful life of your system as you run increasingly demanding software applications in the future.
Q: Do I have to install matching pairs?
A: No.
No, you can install modules one at a time, and you can mix different densities of modules in your computer. But if your computer supports dual-channel memory configurations, you should install in identical pairs (preferably in kits) for optimal performance.
Q: Does my computer support dual-channel memory?
A: No.
Your system does not support dual channel.
Q: Does my computer support ECC memory?
A: Yes.
Your system supports ECC. You can put non-ECC modules into an ECC system, but be sure not to mix ECC and non-ECC modules within a system. Install the same type of modules that are already in your system.

Jan 13, 2010 | ASUS Intel 845D Chipset P4B266 (P4B266-PA)...

1 Answer

Can i use the ddr2 ram in this motherboard?

your motherboard model supports only DDR type of RAM memory modules.
The details are:
Memory Type: DDR - 400 and 333 MHz; dual
Max Memory:
channel support
Memory Slots: Up to 4 GB
Four slots

I hope this solution is helpful to you

Jan 04, 2010 | Intel D915GVWB Motherboard

2 Answers

How much the memory on compaq v3000z can be increased and what type ddr, ddr2 or ddr3? currently it has 256.

Compaq Presario V V3000 Specification Memory Type: DDR2 SODIMM 200pin DDR SODIMM:
DDR, double data rate is a type of SDRAM in which data is sent on both the rising and falling edges of clock cycles in a data burst. It is usually referred to as DDR as opposed to DDR SDRAM.
SODIMM, small outline dual inline memory module. Smaller and thinner than standard DIMMs, SODIMMs are typically used in laptop computers.
Memory Speed: PC2-4200, PC2-5300 Chipset: Intel 945GM Chipset :
A group of chips that together make up a complete computer processing unit, usually on one circuit board (the motherboard). It may include the main central processor, graphics processors, secondary cache memory, and input-output controllers. Memory is one component controlled by the chipset. Standard Memory: 512MB Removable Memory Slot(s): 2 Max. Memory Per System: 2048MB (2GB) Max. Memory Per Slot: 2048MB (2GB) Dual Channel Memory Support: Supported Dual Channel :
A development in motherboard and chipset design that allows for increased bandwidth transfer when using two or more memory modules in separate transfer channels. These separate channels allow each module access to the memory controller, increasing throughput bandwidth. It is a good idea to use matched pairs of modules to ensure the best compatibility for dual channel operation. Tri-Channel Memory Support: Not Support Tri-Channel :
A development in motherboard and chipset design that allows for increased bandwidth transfer when using three or more memory modules in separate transfer channels. These separate channels allow each module access to the memory controller, increasing throughput bandwidth. It is a good idea to use matched three modules to ensure the best compatibility for tri-channel operation. Install Memory in Pairs: Not Required Install in Pairs :
Memory modules must be installed in pairs of matched memory size. This means that if you purchased your computer with 128 MB of memory installed and you want to add another 512 MB of memory, you must remove the two continuity modules and replace them with two 256-MB memory modules.

Aug 19, 2009 | HP Compaq Presario v3000z Notebook

1 Answer

Does GA-8I945P motherboard support high density memory?

You have 4 slots available. Each slot can take a 1gb non ecc memory module with the specs below.

4 DDR II DIMM memory slots (supports up to 4GB memory) 
Supports 1.8V DDR II DIMM 
Supports dual channel DDR II 667/533/400 DIMM

Mar 22, 2009 | ASUS P4VP-MX Motherboard

2 Answers

Does ASRock 775i65GV supports DDR2 memory?

No only DDR upto 2GB supported by your motherboard...

Dec 08, 2008 | Asrock 775i65GV Motherboard

2 Answers

Ram support

As much as I would love to spend a couple hours making you a list of Ram that your board supports, not happening.
However you can do this your self by looking in your manual.
Download your manual here:

Go to the top of page 15.
Your board requires a voltage of no more than 2.5v
GA-8IPE1000 Series includes 4 DIMM sockets, and each Channel has two DIMM sockets as following:
Channel A : DDR 1, DDR 2
Channel B : DDR 3, DDR 4
If you want to operate the Dual Channel Technology, please note the following explanations due to the
limitation of Intel chipset specifications.
1. Dual channel memory cannot be used if one DDR memory modules are installed.
2. If two DDR memory modules are installed (same storage capacity), one must be added to the
Channel A slot and the other in the Channel B slot in order to use dual channel memory. Dual
channel memory cannot function if both DDR memory modules are installed on the same channel.
3. If four DDR memory modules are installed, please use memory of the same storage capacity in
order to use dual channel memory and for BIOS to detect all the DDR memory modules.
We'll strongly recommend our user to slot two DDR memory modules into the DIMMs with the same color in
order for Dual Channel Technology to work.

You board supports this type of memory:

Good Luck & kind Regards.
& please vote.

Mar 16, 2008 | Gigabyte GA-8IPE1000-G (MBGA81PE1000G)...

1 Answer

Must I use the 2 memory slots for this dual channel DDR motherboard?

Are you sure the stick of RAM you are using isnt made by Rambus? If it is it will have to be paired with another stick of the same type. Also try using the other slot.

Nov 16, 2007 | PC Chips A21G Motherboard

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