Computer Problems? Computing.Net has over 1,000,000 posts about all things technology related! Over 90% answered within 24 hours! Click here to start participating now! Also, be sure to check out the New User Guide.
pc133 backwards compatible with pc100?
Name: micky Date: March 13, 2002 at 22:35:53 Pacific
Comment:
I have a laptop that runs off a 100mhz bus and I want to buy a 256mb stick for it on Ebay but the seller doesn't say whether it's PC100 or PC133 and the auction ends early in the morning, don't have the chance to question him. I know that sometimes PC133 is backwards compat. with PC100 but is it always?
Name: Brant Date: March 14, 2002 at 00:00:34 Pacific
Reply:
PC133 will work fine, just runs at slower speed of the bus.
0
Response Number 3
Name: thekid Date: March 14, 2002 at 02:31:58 Pacific
Reply:
Brant is right on.
0
Response Number 4
Name: Nick R (by Nick Ritchie) Date: March 14, 2002 at 04:27:58 Pacific
Reply:
thekid is right about Brant being right . They do have backward compatablity . In other words you can use a 133 in 100 slot and it will work fine . You should put the newer 133 stick in slot 1 ! LOL ,Nick
In my experience the 133 has always worked as 100. The system just reads it at the slower speed. Ive even mixed and matched it and got it to work.
A while back i remember a guy who posted for about a month here, cant remember his screen name. One of his posts went into some technical jargon explaining why it doesnt work sometimes. The guy claimed to be an expert and from his post i believed it but who knows.
If you call up the laptops tech support line they will say it wont work. If you asked me on the street id say go for it. The only thing you can do is give it a shot. I assume its at a good price so if it doesnt work take a snapshot and resell it :).
0
Response Number 6
Name: micky Date: March 14, 2002 at 07:29:44 Pacific
Reply:
thanks for the replies everyone. I think I will give it a shot and place a bid on it.
0
Response Number 7
Name: micky Date: March 14, 2002 at 08:22:48 Pacific
Reply:
I just stumbled on this Ebay auction description:
NEW! Viking Universal 256MB PC133MHz, 32X64, NON-ECC, CL3, SERIAL# 98378756 SODIMM For Laptops. It will fit in 99% of the laptops that use PC133 memory. It will not work if you need PC100....
I think my bid just went down ;)
0
Response Number 8
Name: Xenos Date: March 14, 2002 at 12:20:28 Pacific
Reply:
Hopefully this will be the last post on this, Brant is ABSOLUTELY correct. And only is PC133 backwards compatible, but it WILL work next to a PC100. What will NOT work, is PC100 when your bus speed is 133. Cheers :)
0
Response Number 9
Name: micky Date: March 14, 2002 at 14:44:03 Pacific
Reply:
Well, I got the module off Ebay for $41, a new PNY, so if it doesn't work I should be able to get my money back (and maybe then some) anyway. Thanks to all who replied.
Summary: pcc133 is backwards compatible with pc100 is what the tech told me at the pc store, but will it mix with the pc100 that is already installed. I usually check pricewatch.com for best prices and crucia...
Summary: From VIA Overview of USB "USB2.0 is backwards compatible with USB1.0 and USB1.1-enabled software and peripherals". Can I use USB2.0 devices with my USB1.1 port? / Can I use USB 1.1 devices with my US...
Summary: if the old ram is 66mhz then it's an old mobo. most of these old 66mhz mobo's wont take pc133 ram. the pc133 is backwards compatable to pc100 but not pc66. ...
0 
