Re: SDRAM TO DDR

"Roger" <Monkey@xxxxxxxxxxxxxxx> wrote in message news:uTeA9wzdJHA.1184@xxxxxxxxxxxxxxxxxxxxxxx

"Mike Hall - MVP" <mikehall@xxxxxxxxxxxxxxx> wrote in message news:O3E3LTzdJHA.4684@xxxxxxxxxxxxxxxxxxxxxxx
"Roger" <Monkey@xxxxxxxxxxxxxxx> wrote in message news:uYOCJNzdJHA.5984@xxxxxxxxxxxxxxxxxxxxxxx

"Paul" <nospam@xxxxxxxxxx> wrote in message news:gknlr8$fq$1@xxxxxxxxxxxxxxxxxxxxxx
Roger wrote:
Help please,

My OS is XP Pro SP2 my board is ECS 62-0206-001131-00101111-040201 SIS735 K7S5A. I have been running on Sdram 512 133 MHz but are changing to DDR 184 pin 266MHz. I removed SDRAM from board and inserted the new DDR 2 sticks of 512mb this would give me the board max fitted of 1GB. When I booted back up it appeared not to recognize them it was searching as my both CD & DVD lights kept coming on. I thought that system would pick them up as if I had changed the old SDRAM. Have I got to go into the bios to cause it to recognize these two new DDR slots which are alongside my SDRAM slots. All help would be gratefully received.

Roger
=============================================== ===================================

http://www.unicornsoft-bochum.de/DOK/mainboard/m-boards/k7s5a.JPG

I don't see anything on the motherboard to enable one type of
memory over the other. Try the new memory one stick at a time and
see if it is detected that way. Also test that the old memory
still works.

One kind of memory runs at 2.5V and the other at 3.3V. There
is probably onboard regulation of the voltage, and it switches
to one of those values, based on detecting RAM in the slot.

If there is a problem with the new RAM, such as a short circuit
on the power rail, that could damage something. Which is why
I recommend testing that a single stick of the old RAM works,
before going back and testing the new RAM again.

It wouldn't make sense to trigger that from a BIOS setting,
since the BIOS screen will not appear unless working RAM
is present.

Paul

Thank you to all, and must apologize for my typing. They are not DDR2, they are DDR 266MHz I meant I had two 512 modules They are Samsung brought from Novatech England. On the module on one label it says RAM-21/51s. they are correct spec

I did replace my old SDRAM (2) 256 sticks, and all was as normal when switching main power back on.
But when I tried DDR my screen would not boot from stanby and disc drives kept searching for a disc ! I have the manual already from sometime back.
This did not mention any special procedure, but appeared to show instructions when first building unit.
I will also try the site mentioned to check my current memory which appears to work fine. PLEASE keep your good advice coming which should help me out of this problems

Regards Roger
======================================== =====================================



Disk drives kept searching for what disk?

--
I don't Know, the lights come on the DVD drive, then CDR then back again,without any further action or the Monitor remains blank without a boot screen.

Roger



Try the new memory sticks one at a time and in each of the slots. You may have a bad one..


--
Mike Hall - MVP

Mike's Window - My Blog..
http://msmvps.com/blogs/mikehall/default.aspx




.

Relevant Pages

  • Re: Which memory upgrade ?
    ... There are 4 available memory slots. ... The motherboard specification says that it will support both DDR and SDRAM memory, with a maximum capacity 2GB DDR or 2GB SDRAM, thus: ...
    (microsoft.public.windowsxp.hardware)
  • Re: Bad Memory ?
    ... The motherboard does support both SDRAM & DDR. ... | compatible memory. ...
    (microsoft.public.windowsxp.hardware)
  • Re: SDRAM TO DDR
    ... to DDR 184 pin 266MHz. ... system would pick them up as if I had changed the old SDRAM. ... memory over the other. ... If there is a problem with the new RAM, ...
    (microsoft.public.windowsxp.hardware)
  • Re: Minimum startup
    ... - The ARM vectors can be relocated to high memory, ... and your RAM section would start wherever physical RAM is located on ... Now, if your loader is actually going to be copied to and run from SDRAM, ... then your RAMIMAGE section should be using SDRAM physical addresses. ...
    (microsoft.public.windowsce.platbuilder)
  • Re: Which FPGA and memory to use? The eternal X vs. A question.
    ... so I got the Spartan 3E "starter kit" that comes with DDR SDRAM. ... Unfortunately I can't make the memory work using the core generator. ... A 32x16 memory uses 16 slices in a Xilinx ...
    (comp.arch.fpga)