Celly 300As

Geeky1Geeky1 University of the Pacific (Stockton, CA, USA)
edited March 2004 in Hardware
Is there any way to change the multiplier on the Celly 300As WITHOUT using jumpers on the board? I've got a couple of dual slot 1 boards (1 i440GX, 1 i440LX), and one of them is begging for dual 300As. But the boards top out at 100/133MHz (124MHz stably) FSBs with like 5x multipliers... I was hoping for more like 2x 600-750MHz... There's no chance of the Celerons having anything similar to the bridges on the athlons that'd let me hard code higher multipliers, is there?

Comments

  • Omega65Omega65 Philadelphia, Pa
    edited March 2004
    Nope - Celeron 300A & up were all multiplier locked.

    I beleive The last Intel CPUs to be unlocked were the Pentium MMXs 166-233mhz.
  • Geeky1Geeky1 University of the Pacific (Stockton, CA, USA)
    edited March 2004
    Are you sure? The Celeron 300As have hit 800MHz+, which means they'd need a FSB >150MHz. There is no WAY any P3 chipset is going to hit much over 150. I've heard of 440BX's hitting 150, but higher than that is going to be pushing the AGP/PCI cards an awful lot.

    So, I'm almost positive that they were unlocked.
  • Omega65Omega65 Philadelphia, Pa
    edited March 2004
    Celeron 300A the first P2 to have integrated L2 cache (128K). Stock FSB was 66mhz with a 4.5 multi. Most could do 450mhz (FSB100) with stock v core and some did over 500mhz @ FSB112 which was the most you could get from the early PC100 mobos.

    Any Celeron 300A you heard of hitting 800+ is being cooled by LN

    BTW Some of HardOCP and Anandtech earliest articles were about OCing the Celeron 300A. And the Original Celeron 300 was a Slot1 Pentium2 300 with the external (2) 256K L2 cache chips removed. It was nicknamed the "DeCeleron"
  • Omega65Omega65 Philadelphia, Pa
    edited March 2004
    BTW I pretty sure I have a Celeron 333 somewhere if you want to play with one.. :)

    HardOCP: Celeron 300A Review Tuesday, September 29, 1998

    Anandtech: Celeron 300A Review August 31st, 1998
    Now keep in mind that both the Celeron 300A and the Celeron 333 are 66MHz FSB processors, meaning they were designed for use with the 66MHz Front Side Bus frequency and on those motherboards that auto-detect the FSB setting these processors will report as being 66MHz parts. The 300A runs at 66 x 4.5, and the 333 runs at a clean 66 x 5.0.

    Intel, being smarter than the average bear, took certain precautions to make sure that the Celeron 300A would run at 300MHz and the Celeron 333 would run at 333MHz. Unlike older Intel and non-Intel processors, the Celeron is a clock-locked processor meaning that it recognizes a single clock multiplier.
  • kanezfankanezfan sunny south florida Icrontian
    edited March 2004
    unless you can find an engineering sample, you're stuck
  • Omega65Omega65 Philadelphia, Pa
    edited March 2004
    Geeky1 - You might be thinking of the Celeron 533A (8X 66mhz) they would do 800mhz @ FSB100 @ default V
  • Geeky1Geeky1 University of the Pacific (Stockton, CA, USA)
    edited March 2004
    It's possible, although I could've sworn I've heard of 300As hitting 600MHz, 700MHz, and in some cases (with extreme cooling) 800MHz+
  • muddocktormuddocktor
    edited March 2004
    Naw Geeky, you must be thinking of the Cely 533's. No Intel chips of the 300A/P2 era and that particular process would get to 700-800 Mhz without resorting to some kind of exotic cooling system. The Celery 300A generally topped out around 600 MHz, with a few being able to go a little farther. The 300A was Intel's first release of a proc that incorporated the L2 cache integrated into the proc die and was the direct lead-in for the P3 coppermine procs, because the P3 katmai stayed with the old process off-die L2 cache running at half speed.
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