It turns out I've got one stick of:
Infineon HYB25D256800 AT-7
with a 512 meg sticker. Although some web sites claim it's 512 meg, others claim it's 256 meg,
www.infineon.com doesn't know what it is.
I couldn't find it on their site, even in the discontinued area. (they've got the worlds worst search engine.)
www.google.com worked fine but no site listed had any valid info on the memory stick. So I'm stuck again.
Slogan, I seated it, reseated it, sat on it, shoved it in every slot I got & my 512 meg still has 256 meg showing.
I guess when they said (%50 off sale) they wern't talking about money.

So that's one less try I'll have to go through before I buy some new memory. Thankx for trying for me.
Markfw900, Maybe the motherboard can't handle that high a density. Did you check the manual ?
No manual so I down loaded a .PDF you know the kind that states: Your cmos options are AUTO, 2, 4
then you look at the screen and that's what it says, so they've told you nothing you don't already know
other than they don't have a clue either, their just doing their job.

CMOS reports 256 meg, non quick boot increments to 256 meg 4 times, DOS MEM command returns 256 meg XMS.
Quote: If Linux would run all of my stuff, I would never use Microsoft again
I hope you don't mind if I quote you now and then ?
When Win 3.0 came on my new 386, I swore I'ld never do that again.
My cure to the problem was: Never a buyer be!
I get my MS OS software from folks who buy new computers systems with OS, then I get their old OS fer a song.
Win98 was the best I've done so far. I was inches away from Win98 SE one day & that's the big one that got away.
The rest are mounted on my wall as trophys.
Oh yeah, I forgot to mention, when I got the Asus A7V266 board I tried everything I could think of
& it did find the 512 meg once, I haven't got a clue as to what I did, or how I got it to go back to all screwed up again.
But I was messing around with BIOS & CMOS setup at the time.
AND, I didn't mention that the reason I put the 512 memory in another momma board is that I burnt the old board up on
Redneck Rampage HickMart.map I was just about to let the Vixen have it when I smelt the smoke and within 2 CRT blinks,
all was quiet.

I shouldn't have tried to save my game before I reached for the power switch, habit I guess.

So the memory has had a hard life and although it worked in the other board, there is some questions as to weather or not
it survived the break down intact. I tried it in my new board #2, an ESC K7S5A pro (cauff cauff) & it didn't work at all.
Can you melt the gold off of those things ? MEMORY FOR SALE, %50 OFF
Viper96720, the Asus MB is suspose to handle 3gb pc2100, & I tried different bank interleave settings, auto, 2, 4, none.
Hay, come to think of it, I didn't try "NONE" and I don't know what any of them mean ? I'm guessing that since the chip
is not double layered on either side (just a single row on each side) I have 2 banks? Then I tried different combo's
of interleave, SPD stuff, etc. It usually takes longer to try all the combinations than picking a $2 combination lock.
So I try a while & move on. I think Cmos, Bios Flash mem, then Corsair twin 512 pack for $152 is the cure.
I haven't looked into weather Infineon memory has any gaurentee, but I'm thinking that I'm stuck with it for now.
MEMORY FOR SALE, INFINEON 256 MB, must sell, mother lost job at cement factory & I must find a job or sell the memory.
JBT, my old mamma board burnt up and now it's a 256 meg instead of a 512 meg.
I think I'm in the same boat you were, it's a doomed stick.
The only thing is: I don't think I have a gaurentee of any kind.
No PorBleemo, I'll pay attention to Nick, it ain't slander if it's true, freedom of speach and all.
Plus he's got more posts than I do. (12)
I didn't know there was a web site like this one available when I bought the hardware junk I've got.
I read through a few posts here the other day and got some what enlightened in a crash course.
I'll have to play catch up for a while, then I'll lay in wait for unSaint Nick.

As for the memory, I don't know what to do? Keep trying instead of buying?
Buy another fire extinguisher & get by with it as long as I can?
OR break down and buy, it is Xmas season and all. So this year it might as well be memory under the tree for me.
But memory makes such a small insignificant looking package, the dog could swallow it and I'ld be back here posting,
512 MEG DDR MEMORY REMOVAL TIPS WANTED, xray shows stuck sideways, which end do I start looking for it at?
I don't want to get bit. If I get some doggie downers from the vet, should I take some myself?

DOG FOR SALE $600 (I'm only asking what I've got into him so far, I'm not making anything on the deal.)
Dexvx, I got the memory as no name, but found out like you said, it's a reasonably good brand name.
But now I'm thinking that bad memory with a life time gaurentee might be better than good memory with a 3 month policy.
I'm going to have to read some more posts around here & git edcumacated.
Thankx all
I suspose I could call the XMS driver in a little.com and get a mem available return?
Code:
MOV AH,8 ; Function, Get the XMS memory available stats
CALL FAR [CS:XMSadr] ; Dword adr, returns AX & DX
MOV WORD [CS:XMSmax],AX ; AX = largest K_block available
MOV WORD [CS:XMSsiz],DX ; DX = total K_bytes available
Bitdog