I'm on the hunt for some chips to upgrade the ram on my xbox to 128Mb. I know of three different chips used which are: Samsung K4D263238D-QC50 Samsung K4D263238F-QC50 Samsung K4D263238M-QC50 Were these the only ones used and are they compatible with each other? I read somewhere that it was only a die revision which shouldn't affect mixing different types. It might be worth doing a group buy if enough members are interested, and if a cheap supplier can be found.
Dunno, but I contacted Dr. Wünsche from EMS last December about these chip sets. (http://www.xbox-linux.org/wiki/Upgrading_Xbox_RAM_HOWTO seems offline though ?) He quoted still having some left. Problem is getting someone to hand-solder them in, as I sure am not doing this myself... (found a shop willing to do so).
I can solder the chips in. Dont know if you can even buy them directly - last I heard people were buying an old geforce card that had the same chips.
Realistically I'd have to imagine any DDR chips that meet the spec of the XBox chips (I have their datasheet somewhere) would work as long as they're pin compatible but I know of noone who has tested that idea. I myself have an XBox with 3 of the 4 extra chips installed but #4 took a dive onto some carpet and had pins yanked off. The XBox doesn't enumerate any of the additional chips but doesn't act adversely either. They were all salvaged off a dead XBox mobo.
My above post was supposed to have the word. "anymore" in it. However, google Fu returns 64MB nVidia GeForce2 GTS Pro as the card with the right chips. Likely cheap on ebay
What's the real advantage of upgrading the RAM though. I know there's a couple of emu's out there that utilise it or certain ROMs do but apart from that is there any real point? I've got 4 Xboxes of my own sut here so if it's of any real merit I may be persuaded to chip in on a group buy if the chips are cheap enough.
Mame/linux/XBMC Thats about it and maybe a few unreleased dev games that have not been optimised (dev boxes have more ram, as you likely already know). To be honest, I have seen xbox 1's scrapped or sold on ebay for like £5 - would probably be the easiest and most reliable way to get the chips..... if alittle wasteful.
It is and I hate to destroy anything that still has life in it just to upgrade something else. I made very sure that the XBox mobo I used as a donor wasn't able to be fixed in any real tangible way. Best I could tell the TSOP had been fried somehow.
People have different definitions of repairable. My original xbox was a bad tsop flash - I had LPC modchip on it for years and year. I actually found it years later, when I had the programmer and skills to replace the chip and fixed it no problem. So technically that board was broken to most people. I still have the chip I removed too, as a keep sake. But I do get your point, maybe scout ebay for a job lot of broken consoles and part them out?
