PC133 in 100 Mhz MB?

[rajya]

Hello, I have a PIII 450 on a Intel SE440BX2 board. I understand the SE440BX2 supports upto 100 Mhz RAM only.

1. Can I use a PC133 RAM in this board safely?
I ask this as I have tested a PC133 Mhz 256 Hyundai module therein and it seemed to be working fine.

2. Also, can I use both PC100 & PC133 modules (different manufacturers) at the same time?

Kindly clarify

 

[CMRvet]

RAM is backwards compatible. So you will not have any problem using PC 133 in a 100 MHz system. Actually I’m doing that. Also I have already mixed PC 100 and 133 and no problems.
Regards,
CMR

 

[Arrow]

Most likely you will be fine in both circumstances. It will run at the slower speed of the two DIMMs.

Rob
Please visit <b><A HREF="http://www.ncix.com/canada/index.cfm?affiliateid=319048" target="_new">http://www.ncix.com/canada/index.cfm?affiliateid=319048</A></b>

 

[girish]

lowest DIMM speed detected by the chipset, or highest speed the chipset would support, or the speed at its set at if overclocked.

<font color=red>No system is fool-proof. Fools are Ingenious!</font color=red>

 

[Guest]

for me...adding both of 100Mhz and 133Mhz in one mianboard is cause to just trowing your money without buying a technology. remember! buying a hardware also buying a technology..., and the result is your 133Mhz will not working proverly because it wiil follow the lowest speed.

 

[CMRvet]

PC 133 does work properly with 100 MHz FSB.
About the prices, PC 100 and 133 are at the same level, see <A HREF="http://www.pricewatch.com" target="_new">http://www.pricewatch.com</A>.
Currently PC 133 is getting cheaper.
Also there are two more reasons to buy PC 133:
1- Future overclocking.
2- Use that memory in a newer system (based in a 133 MHz bus)

 

[lordneptune]

I actually have a different story with this backwards compatability. I have 512 MB of ram in two PC133 sticks (256MB a piece). Originally, I have 128MB of PC100 ram in my computer. I have 3 DIMM slots, with the PC100 in the first slot. When I installed the new ram, it recognized it perfectly fine, but it never got to windows. It could only get in there in safe mode. (I'm currently running Windows ME... Waiting for XP so I can test it on that OS). But, it did recognize it. So, I dunno. Hope that helps in some way.

Don't criticize me the day I don't know. Criticize me the day I don't want to know.

 

[lhgpoobaa]

course. ive used PC133 ram with PC66!

just check that your not putting excess sized ram in...
i.e. the older motherboards cant take sticks of ram bigger than 256mb or some cant take greater than 128mb sticks...




Is that a Northwoody in your pocket or are you just eXPited to see me?

 

[girish]

1. PC133 can work on a PC100 system just fine.
2. as for different manufacturers it is difficult to say since the protocols and timings maybe different. the chipset will take the lowest common parameters and run the memory at that, which may not perform optimally. worse, it can render the system unstable. its much better to use a single DIMM, or multiple DIMMs preferably from the same manufacturer/batch/chip.

So you are based in Calcutta.. sorry Kolkata? I am in Pune.

girish

<font color=red>No system is fool-proof. Fools are Ingenious!</font color=red>

 

[upec]

It is because Windows ME only support up to 512MB.

 

[lordneptune]

Hmmm, that kinda sucks. My MB supports 768MB of memory, from what my MB manual states. Kinda generic if Windows ME is the thing that's holding me back. When I get home, I'm going to try and take out my 128MB stick of memory and throw the two 256MB sticks of memory in. I'll see if that works...

Don't criticize me the day I don't know. Criticize me the day I don't want to know.

 

[bum_jcrules]

If you are an adventurous soul you could overclock the FSB to 113 or if the board, AGP, PCI buses can handle it maybe higher like 133MHz. But that is completely up to you.

However based on the specs listed on Intel's website for this <A HREF="http://program.intel.com/shared/products/boards/se440bx2/se440bx2_brief.htm" target="_new"> SE440BX2 Motherboard, </A> I would look for a newer motherboard... but again that is me.

<b>All for one and one for all...and 3 for 5! - Curly - The Three Stooges</b> :lol:

 

[girish]

Intel boards dont overclock!

And AGP and PCI buses do not operate at full FSB, usually they operate around 33.3 MHz for PCI and 66 MHz AGP, which are derived from the FSB by a divider. It is done so that the transactions on these buses are in sync with the FSB, not that they cannot operate asynchronously, in fact most of the times they do!

Most PCI devices will take higher faster clock, but it is the IDE controller that limits it. It cannot work reliably at faster than 38~39 MHz, so most new boards provide a divider of 5 that allows you to increase the FSB to the region of 166 and yet keep the PCI bus at 33!

girish

<font color=red>No system is fool-proof. Fools are Ingenious!</font color=red>