I have two 1gb ddr1 ram and my processor has two slots, totalling to 2gb of ram, but when both r installed the system is not booting,but when a solo ram is plugged in, its working n both the slots r not haywired, they r in a mint condition, can u assist how to hammer out a solution 4 this problem n boot the sytem when two rams are inserted , they r of same frequency 2, i shuffled and reshuffles the rams and slots,but its not getting booted

You don't say if the Notebook is 32 or 64 bit.
If its 32 you may have a problem uprating the RAM more than be handled.

The manual for your motherboard states:

For dual-channel memory configuration (2), you may:

• install identical DIMMs in all four sockets OR

• install an identical DIMM pair in DIMM_A1 and DIMM_B1 (yellow

sockets) and another identical DIMM pair in DIMM_A2 and

DIMM_B2 (black sockets)

* Always use identical DDR2 DIMM pairs for dual-channel model. For

optimum compatibility, we recommend that you obtain memory modules
from the same vendor.

According to some research, your desktop has 4 RAM slots available. The total maximum RAM your desktop can hold is 2GB (2048MB). Furthermore, each slot can hold a maximum of 1GB (1024) but cannot exceed the 2GB total.
This means you can theoretically install 2 x 1GB RAM DIMMS in 2 RAM slots or 4 x 512MB RAM DIMMS. Both will meet the desktops 2GB limitation.
The RAM specifications for your desktop are as follows:
RAM Limit: 2GB (2048MB) RAM Slot Type: SO-DIMM RAM Type: DDR1 (not DDR2 or DDR3) RAM Speed: PC3200/DDR400 ECC Type: Non-ECC
TIP: The RAM is DDR which means that while you can install them as singles (single-channel mode), the system will see a speed benefit from installing them as matched pairs (dual-channel mode).

DDR1

Yes.

Provided,
1) It is no more than the maximum amount, for that ram memory slot.

2) Adding it, will not go over the Maximum Total Amount for the motherboard.

If this pertains to an Acer Aspire T135 desktop computer,

A) The Maximum Total Amount is 2GB.

B) The Maximum Amount for Each ram memory slot is 1GB.

C) PC3200 is the best you can use.
DDR Sdram at 400MegaHertz. (400MHz)

[It can also use PC2100, and PC2700.

DDR Sdram at 266MHz, and DDR Sdram at 333MHz, respectively ]

Once you install the ram memory, BIOS should automatically find it.

If you are only going to use one ram memory module, be sure to put it in Slot 1.
The Processor reads ram memory in Slot 1 first.

[Slot 1 is closest to the Processor.
It may have DIMM 1 printed on the motherboard, next to Slot 1 ]

Dear Sir,

*********** board is Asus old p4 Mother board.It supports maximum 1GB RAM of DDR 400(DDR1). According to your post your computer having only one 512 MB working RAM. If you want good purformance you can upgrade your computer by purchasing another 512MB DDR400 RAM and install it on another RAM slot.If your computer have only one working RAM slot,you can purchase 1GB DDR400 RAM & install it on older RAM place. I think it solves your problem.if you have any problem come back with more information. I will try to assist you more accurately.

good luck

- 2 x DDR slots, DDR333/266 non-ECC, un-buffered memory
- Max. capacity of system memory: 2GB

your motherboard uses DDR1 SDRAM PC2100 max. as stated on their website:
http://www.biostar-usa.com/mbdetails.asp?model=u8668+d
you cannont put DDR2, but you can expand up to 2GB

Hope this helps
Alex
www.CAS411.com

Hey,

it should show in the bios as 2048.

looking at the details of the motherboard
Memory Type DDR SDRAM Number of Memory Slots 2 x DIMMs Supported RAM speeds 400 MHz

Got the right speed ram etc?



Thanks,
Ekse

the manual is here

http://www.ecs.com.tw/ECSWebSite/Downloads/DownloadFile.aspx?catid=1&driverid=2258&areaid=2&LanID=0


pages 87 & 88 show how to install

it uses' ddr1 memory up to 2gb max total in the laptop

Memory
0MB on board, 2 SO-DIMM slots, up to 2GB
Support DDR 266/333MHz system memory