366 @ 550 was another popular option

366 @ 550 was another popular option

Tried that. Didn't budged even with increased voltage. The magic of 300A comes from success rate - you can overclock it to 450 with crappiest CPU bin possible. Maybe you'll need to increase voltage a little bit, but it will work.

early 366 (January 1999) were awful, but got excellent somewhere in mid to late 1999. Looking at https://en.wikipedia.org/wiki/List_of_Intel_C … _based_Celerons maybe it was release of 466 in April that updated all lines to B0 stepping?

Yep, I have B0 SL35S. Still don't work on 550. Later revision is not a magic ticket, just better average overclock, if you compare it batch-to-batch.

A few years ago I decided to get an overclocked 300A as it was super popular in its days and said to be easily and surely overclocked. So I wanted one that does the trick at stock voltage and run at 450MHz stably at default 2V. I don't know the reason but I have had quite bad success rate, like one in three to six in the scraps could do it, most of them were unstable in my P3B-F at those settings. What.

I remember the 300A's from the "LAN days" - grouped with either an ASUS P2B or an Abit BH6 they would go from 450- to 504mhz delivering sweet Quake/II pleasure for 1/8th of the price of a PII-450. I remember sometimes "taping off" pins when using the ASUS board... maybe due to voltage manipulation...?

alvaro84 wrote on 2022-11-26, 00:15:

A few years ago I decided to get an overclocked 300A as it was super popular in its days and said to be easily and surely overclocked. So I wanted one that does the trick at stock voltage and run at 450MHz stably at default 2V. I don't know the reason but I have had quite bad success rate, like one in three to six in the scraps could do it, most of them were unstable in my P3B-F at those settings. What.

My SL32A won't do 450 at stock voltage. It gets all sorts of corruption. Increase to 2.05V will run most things, but it gets random crashing. It's been a fun toy to play with, but I was disappointed that it couldn't do 450 stock.

kreats wrote on 2022-11-25, 08:53:

366 @ 550 was another popular option

I’ve never forgotten the ZDTV (later TechTV, G4) screensavers series related to this one. I believe over the course of a few episodes, Leo was building a dual Celeron 366 with the intention to overclock each to 550Mhz. He would say it’s a PC that “goes to 11”.

Some googling, I found someone that posted the specs on Imgur of the build:

https://imgur.io/gallery/XUTvb

BP-6 Dual PII/III BX Socket 370 Celeron 366 PPG Dual, overciocked PC100 SDRAM 128 megs SB Live Value 3C905 XL 10/100 non-managed […]
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BP-6 Dual PII/III BX Socket 370
Celeron 366 PPG Dual,
overciocked
PC100 SDRAM 128 megs
SB Live Value
3C905 XL 10/100 non-managed
3.5-inch Floppy
40x
WD29100 2 x 9.1 GB. UDMA66
ZIP 100MB USB
Orb 2.2GB

EDIT: another result from 1999, this build was said to have cost around $1500: https://m.slashdot.org/story/7712

Assembling a dual Celeron 1100MHz is a trivial project, suitable for hardware newbies. Leo LaPorte built one on ZDTV a few weeks ago for about $1500.

TrashPanda wrote on 2022-07-10, 11:00:

Quick question, is the Socket 370 version of the 300A the same chip that is in the Slo1 package ?

Am I right in thinking it was the 370 version that was the famous overclocker ?

I'm convinced that both are the same chips, just with a different interface.
I have a Slot1 version and removed the plastic casing a long time ago to add a better cooler.

Not much to see under the plastic. The only chip on the board is the CPU.

Front : https://retro.user-unfriendly.net/Parts ... front).jpg
Back : https://retro.user-unfriendly.net/Parts ... (back).jpg

I run mine at 450 on a Gigabyte GA-6VXE+ (Apollo Pro 133... I know, not a super great chipset)

As far as I remember, it's probably the piece of hardware I have for the longest time. It was the CPU of my first own computer in ~2000.