I have never seen video RAM chips for sale anywhere. About all you can do is to strip another video card for them.

I think these DIP chips are just normally regular rams?

They are like PLCC sockets, only rectangular instead of square. I guess I will just have to live with 1MB. What are the bit depths supported by a 1MB card? Here is what I'm hoping for:

640x480: 24 bit
800x600: 16 bit
1024x768: 256 color

I think to have 24 bit at the higher resolutions you need 2MB of ram or more.

So you mean SOJ memory chips?

I guess, I'm not really sure. They look like PLCC sockets and are brown. There are two of them on the board.

Like one of these?

Exactly like one of those.

I've never had trouble finding chips. What's the number on the existing chips? Just look it up on the net and usually Mouser, Digikey or sometimes a bit more obscure supply house will have them OR a substitute chip made by a different manufacturer.

I don't think the chips soldered to the board are the same as the ones that go in the socket, though. I tried a search already but either they don't exist or my Google-fu isn't that good.

snorg wrote:

I don't think the chips soldered to the board are the same as the ones that go in the socket, though. I tried a search already but either they don't exist or my Google-fu isn't that good.

They're not the same. It's like the difference between a PLCC 286 and a DIP 286.

If you just post the number then any number of us can likely help you out. The chips can't vary too much with the exception of the package design or they wouldn't work in tandem.

The chips are labelled this way:

Korea
450T (possibly 45UT)
KM44C256CJ-7

They are significantly smaller than the sockets.

http://www.utsource.net/ic-datasheet/KM44C256CJ7-122060.html

From UTsource.

SOJ as i mentioned earlier (just old style socket)

snorg wrote:

Exactly like one of those.

Which one ?
The left one or the right one

It's not clear to me even what type of package this chip uses.

I have tried this and might have killed a Tseng 4000wp2 :L Trident is one of the slower choices out there but compatibility. Once you do upgrade the memory the gains will come mainly from the extra bandwidth but not much else.

Well I suppose I could order 4 chips and practice on a spare board I have and if the one upgrade goes well, then upgrade the other.

On another note, these are definitely SOJ package chips? I think I saw another package type called TSOP and it looked similar.

snorg wrote:

Well I suppose I could order 4 chips and practice on a spare board I have and if the one upgrade goes well, then upgrade the other.

On another note, these are definitely SOJ package chips? I think I saw another package type called TSOP and it looked similar.

Don't just get tied up on what the package type but what type of memory it is like edo and fpm. A lot of those chips are usually edo and normally around 512kb each, you could scavenge the chips cheap if could score a few cards dirt cheap. The NS rating also counts and is best to only match the speed of the existing memory but due to age a lot of these chips do turn up bad time to time. 😵

nforce4max wrote:

I have tried this and might have killed a Tseng 4000wp2 :L Trident is one of the slower choices out there but compatibility. Once you do upgrade the memory the gains will come mainly from the extra bandwidth but not much else.

Did you stick the memory in the wrong way>