T22 -- 1 gig RAM?

[jimduchek]

Has anyone tried it? I don't want to spend 60-70 bucks apiece on 512 MB sticks if it won't work.

Jim

[ambientscape]

Has anyone tried it? I don't want to spend 60-70 bucks apiece on 512 MB sticks if it won't work.

Jim

Unfortunately, T22 only support maximum up to 512MB PC100 only. Why not upgrading the hard drive instead?

[jimduchek]

Is this '512 maximum' because of the manual, or because somebody's actually tried it and it didn't work? And I probably will upgrade the hard drive eventually, but I'd rather avoid swapping at all.

[tfflivemb2]

The biggest problem that you will run into is that the FSB is 100Mhz, which means that the system requires PC100 ram. The largest PC100 stick that I am aware of is only 256MB (low density). If they made a 512MB PC100 stick, it might work, but I am pretty certain that there weren't any made.

[jimduchek]

They do make pc100 512MB sticks, although they are hard to find. It's relatively easy to find a pc133 stick though, which should work as well. They're about $70+ a pop though, and I'm willing to put it down to find out, as long as nobody's done it before...

[stevech]

I think FSB is less of a problem, the problem really is the T22, unlike the T23, takes low density memory ONLY (16 components vs 8 ), and as far as I know, there just isn't any low density 512MB parts.

[tfflivemb2]

I should clarify that I meant LOW DENSITY PC100 512MB sticks.

PC133 won't work...I can tell you that first hand on a T21. The T23 was the first Tseries machine to accept the PC133 chips.

[rmcnelly]

I've got 384MB in my T22 now, how do I upgrade to 512MB?

[tfflivemb2]

@rmcnelly:

You'd have to pick up two 512mb PC100 Low Density Ram sticks. You most likely have one already in your system, along with a 128mb stick.

One a side note: I grew up across the water from you, in Norfolk....I sure do miss it down there.

[tfflivemb2]

I guess I stand corrected...I just searched eBay and may have found some 512mb sticks of PC100 that appear to be low density as they have 16 chips: click here

@jimduchek: If you are willing to spend the $200+ to find out, I am sure that there are MANY people that would be interested. I know that I wouldn't spend that much to find out.

[rmcnelly]

@rmcnelly:

You'd have to pick up two 512mb PC100 Low Density Ram sticks. You most likely have one already in your system, along with a 128mb stick.

One a side note: I grew up across the water from you, in Norfolk....I sure do miss it down there.

Well I just opened her up, and it looks like one DIMM is 256MB, so I'd need another 256MB to replace the 128MB, right? Your post above looks like I'd end up with 1GB if I had two 512's in there.

I'm retired Navy, and spent most of my adult life in Tidewater, so I decided to stay

[tfflivemb2]

@rmcnelly:

You'd have to pick up two 512mb PC100 Low Density Ram sticks. You most likely have one already in your system, along with a 128mb stick.

Sorry, I just caught that I typed two 512mb sticks, I meant 2 256mb sticks. I got caught up in typing on the other topic of trying to get to 1GB. I seriously doubt that you can get to 1GB. To get to the 512mb max, yes you would need to replace the one 128mb with another 256mb stick. Just remember that they HAVE to be Low Density PC100, meaning that they have 16 chips, 8 on each side.

[rmcnelly]

Will this work to replace the 128MB DIMM and bring me up to 512MB total? Is it the right type?

http://eshop.macsales.com/item/Other%20 ... 0SD256328/

[rmcnelly]

Ack, the link in the post above is for 168 pin, I need 144 pin, right?

[rmcnelly]

Found the one needed! Will be soon at 512MB.

Thanks!

[jimduchek]

I've seen it on ebay for around $60-70 a stick (yes, low density if the pictures are to be believed, anyway). It's not a big deal spending the cash to 'find out' -- I can always re-sell them if it doesn't work, if I got a decent price anyway, and then I'm only out a few bucks and some time. If it does work, I'll probably get some piece of it back by selling off the 256M sticks I have..

I guess I'll be the guinea pig, if nobody's tried it. Would really like a gig.

[EDIT] Just bought a single stick of low density PC133. Will let you all know how it goes when I get it.

[stevech]

Wow, 512MB low density!!! Learn something new everyday . 512MB (2x256mb) should not be a problem, as I've been running 2x256MB on my T22 for a long time ( until the screen died ).

[Nolonemo]

Wow, 512MB low density!!! Learn something new everyday . 512MB (2x256mb) should not be a problem, as I've been running 2x256MB on my T22 for a long time ( until the screen died ).

Unless you have a memory addressing limitation.

[jimduchek]

I was just reading the 440BX datasheet and it claims to only support 1 gig if the RAM is registered... I had to go drink with some coworkers and haven't finished reading, but my guess is that even if this 512M stick works, two of them won't work. Nevertheless, I'll give it a go. We'll see.

[TonyJZX]

PC133 won't work...I can tell you that first hand on a T21. The T23 was the first Tseries machine to accept the PC133 chips.

I have a T21/2647.

It has 128Mb in there now - are you saying that PC133 256Mb modules WILL NOT work?

That makes it harder to upgrade.

[TonyJZX]

According to crucial PC133 is fine:

128/256Mb SDRAM, PC133 • CL=2 • Non-parity • 133MHz • 3.3V • 32Meg x 64

[tfflivemb2]

PC133 won't work...I can tell you that first hand on a T21. The T23 was the first Tseries machine to accept the PC133 chips.

I have a T21/2647.

It has 128Mb in there now - are you saying that PC133 256Mb modules WILL NOT work?

That makes it harder to upgrade.

That is correct. 128mb PC133 might work, as I had two difference 128mb PC133 sticks work in a TP600E, even though they weren't supposed to. However, when you get up into the 256mb sticks, they need to be PC100 Low Density ram. (16 chips, 8 on each side)

[TonyJZX]

Like you guys, I get the bits and pieces off ebay.

This makes things harder then.

I may have to keep my eye out for 256Mb pc100 then.

[pianowizard]

I guess I stand corrected...I just searched eBay and may have found some 512mb sticks of PC100 that appear to be low density as they have 16 chips:

Wait a minute, for 512MB PC100 to be low density, shouldn't there be a total of 32 chips? Confused.

[tfflivemb2]

I guess I stand corrected...I just searched eBay and may have found some 512mb sticks of PC100 that appear to be low density as they have 16 chips:

Wait a minute, for 512MB PC100 to be low density, shouldn't there be a total of 32 chips? Confused.

You know what, you're right....I am so used to looking for 256mb low density sticks.

[shankrabbit]

I hate to resurrect such an old thread, but did the OP ever purchase and try?

[synchromesh]

I had a couple of 512MB PC133 16 chip sticks once. Tried them in a T20 system, I think the system only saw them as 256MB each or something like that because later on I've sold them off on this forum.

[tfflivemb2]

Wow, I just realized that I made a lot of typos and errors along the way in this thread...

[shankrabbit]

I had a couple of 512MB PC133 16 chip sticks once. Tried them in a T20 system, I think the system only saw them as 256MB each or something like that because later on I've sold them off on this forum.

Drat. And here I was hoping for good results.

I suppose that if the BIOS only recognizes 2x256 then that is all that will ever be used? No chance of the "phantom" memory usage?

[rkawakami]

It looks like it is possible to use 4 256MB modules with the Intel 440BX chipset given the following:

http://www.intel.com/design/support/faq ... /440bx.htm

Of course that means you would have to add two more sockets to the T21 motherboard and maybe update the BIOS.