Tiido wrote:Even a lowly 2GHz Celeron which heatspreader I turned into a keychain had soldered on silicon. I would think most of the 478 parts are soldered.
You might think that. But you might be wrong. I'm thinking more than half of them aren't soldered. Maybe not a lot more than half. Maybe not even half. I don't know. But probably A LOT of them aren't.
BTW, do you remember which 2GHz Celeron it was? Willamette or Northwood? If Northwood, which sSpec number and stepping? Because the Northwood 2GHz Celeron SL6VR D1 stepping I delidded wasn't soldered.
The Serpent Rider wrote:I think all 800mhz Northwoods are soldered. Some late 3.06ghz D0 stepping CPUs probably too.
There are no D0 stepping 3.06GHz Northwoods AFAIK. Just C1 and D1. There's a Mobile 3.06GHz SL7DT D0, but it's a Prescott. And AFAIK all Prescotts are soldered.
ph4nt0m wrote:All C1 Northwoods that I've delidded had a thermal compound. I don't seem to have delidded any D1 Northwoods yet, but something tells me there's no difference to C1.
Well, I can authoritatively tell you that there is no difference then. Because I've delidded three D1 Northwoods in total. And they all had paste two of them had paste, the other one was soldered.
So far the Socket 478s I've delidded are:
Willamette
1 x Pentium 4 1.8(SL5UK) 1.8GHZ/256/400 D0 = Paste
Northwood
1 x Celeron 2.0(SL6VR) 2.0GHZ/128/400 D1 = Paste
2 x Pentium 4 HT 3.06(SL6PG) 3.06GHZ/512/533 D1 = Paste(on both one), Solder(on the other)
1 x Pentium 4 HT 3.2(SL6WG) 3.2GHZ/512/800 D1 = Solder
Gallatin
1 x Pentium 4 Extreme Edition 3.2(SL7AA) 3.20GHZ/2M/800 M0 = Solder
1 x Pentium 4 Extreme Edition 3.4(SL7CH) 3.40GHZ/2M/800 M0 = Solder
Prescott
1 x Celeron D 335(SL7DM) 2.8GHZ/256/533 D0 = Solder
1 x Pentium 4 HT 3.0E(SL7E4) 3.0GHZ/1M/800 D0 = Solder
1 x Pentium 4 HT 3.0E(SL7PM) 3.0GHZ/1M/800 E0 = Solder
1 x Pentium 4 HT 3.2E(SL7KC) 3.2GHZ/1M/800 D0 = Solder
1 x Mobile Pentium 4 HT 548(SL7X5) 3.33GHZ/1M/533 E0 = Solder
2 x Pentium 4 HT 550(SL7PP) 3.4GHZ/1M/800 E0 = Solder
1 x Pentium 4 HT 550(SL8K4) 3.4GHZ/1M/800 G1 = Solder
Coming soon maybe...eventually...probably not...
Prescott
1 x Pentium 4 HT 3.4E(SL7Q8) 3.4GHZ/1M/800 E0
UPDATE 2019-4-8: Corrections made for accuracy. I could have sworn I'd delidded both of my SL6PG Northwoods. Long story short...I hadn't...only the second one I bought got delidded. So I just delidded the first one to see what the actual story is with it. And to my complete shock, awe, surprise and amazement...IT WAS SOLDERED! 😲 Apparently some Northwoods ARE soldered! How/what/where/why? I haven't a clue. Two otherwise identical Northwood processors. One soldered...one not...WTF? 😕
Anyway. I'm tearing the lids off all of them now. Not to find out if they're soldered or not. I don't really care if they are or aren't. Since I'm going to be running them all bare die from now on. 😁
I'll edit in the results of those other delids when they're finished...
EDIT: Most likely finished with all I'm gonna do. We'll see on those last two...
UPDATE 2019-6-10: I ran across another soldered Northwood. That SL6WG D1 stepping. I'm not likely going to be purchasing any more s478 P4s or Celerons. I would like to get my hands on an SL7CH. But the prices are still a bit loony for what you get with those. Considering a 3.4 Prescott with a decent OC kicks its ass on pretty much all fronts. And can be had for ~1/4 the price...or less! 🤣
Also, since I don't have a setup to run the SL7Q8 bare die, I don't plan on delidding that one. I might do it anyway though. Who knows. But I can almost guarantee it's soldered...being a Prescott...and with the temps it runs.
UPDATE 2019-8-15: I ended up grabbing an SL7CH after all. Since I killed the SL7AA...😵. Too much HSF mounting pressure while running it bare die. Resulting in some extreme(pardon the pun) compression against the inner "ledge" of the socket, pinching some traces in the CPU PCB. Causing them to short...and let the smoke out. 😲 Also burned up a low-side MOSFET on my mobo in the process. All kinds o' fun!!! 🤣
Anyway...picked up another mobo as a replacement which came with an SL5UK. I delidded that and added it to the list above. Probably not going to delid the SL7CH. Then again...you never know what I'll do. 😊
EDIT: I delidded the SL7CH...and killed it too. 😒 Not with excessive mounting pressure...with like 1.68V. Seriously? That's the first s478 CPU I've managed to kill with voltage. The rest have held up just fine with 1.8V+. 😕