What is the difference between E & P on 6400E SDRAM and 6400P SDRAM

According to a couple of people I have conferred with, that RAM should work.
Take a stick of the old ram out and make sure the the cut out, in the new RAM, is in the exact place as the old sticks. It cannot be off by a micron, or it will not fit.

Understanding Identifying and Upgrading the RAM in your PC

Dont click on any of the ads in that article, just read it and you will be able to judge for yourself.

Hello the home page is here:

http://support.asus.com/download.aspx?SLanguage=en&p=1&s=10&m=A7S266-VM%2fU2&os=&hashedid=n%2fa

If any drivers or manual needed select first your windows.
Click on global for download.
Unzip the file and you need a pdf reader (adobe) to read the content.

Here are some specification about you mainboard:

2 x DDR DIMM Sockets
Max.2GB unbuffered PC2100/PC1600 non-ECC SDRAM Memory
2 x SDR DIMM Sockets
Max.2GB unbuffered PC133/PC100 non-ECC SDRAM Memory

(Note: DDR ram and SD ram memory can not be used on A7S266-VM/U2 simultaneously)

This means you can`t use SD RAM together with DDR ram.

The bios could have a setting for this because of the use of 2 different ram types.

Try downloading the manual.

Good luck

Hello. this website will show you the supported RAM for your Motherboard.
RAM Support
Hope this helps!

Two 184-pin DDR DIMMs sockets for 2.5V DDR SDRAM (DDR266/DDR200)

Maximum: 1GB (Unbuffered Memory)/ 2GB (Buffered Memory)

Yes, regestered EEC modules are "buffered", so you should be ok at 2 gigs.

Hi,

Please find the details below:

184-pin DIMM Banking: 2 (2 banks of 1)

Chipset: Intel 845GV

Error Detection Support: Non-ECC only

Max Component Density: 512Mb

Max Unbuffered DDR SDRAM: 2048MB

Module Types Supported: Unbuffered only

Supported DRAM Types: DDR SDRAM only

USB Support: 2.x Compliant

Thanks and regards,

Anil.B.R

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.

This computer (HP Pavilion a620n) has 2 x 184-pin DDR DIMM sockets and supports up to a maximum 2 GB of memory. It supports unbuffered PC2700/2100 non-ECC DDR SDRAM memory. (Also known as DDR333 and DDR2100 respectively)

You simply just push the memory into the DIMM socket on the motherboard. You need to use DDR SDRAM but should check what your I/O bus speed is set at. They make 4 different types of DDR SDRAM. They are DDR-200 (PC1600). DDR-266 (PC2100). DDR-333 (PC2700) and DDR-400 (PC3200). The following links should help you out:
http://www.tech-faq.com/unbuffered-memory.shtml

http://en.wikipedia.org/wiki/DDR_SDRAM

Each memory slot can hold DDR PC2700,DDR PC3200 with a maximum of 1GB per slot.

Chipset: SiS 648

Supported DRAM Types: DDR SDRAM only

184-pin DIMM Banking: 3 (3 banks of 1)

Module Types Supported: Unbuffered only

Max Unbuffered DDR SDRAM: 3072MB

Error Detection Support: Non-ECC only

Graphics Support: AGP 8X

Max Component Density: 512Mb

USB Support: 2.x Compliant

This is the memory specs for your board 4 x 184-pin DIMM Sockets support max. 4GB unbuffered non-ECC PC3200/2700/2100/1600 DDR SDRAM memory Dual-channel memory architecture