What's the difference, if any, in these 2 CPU's

SL4CD

SL4MB

Both are . . .

800MHz
133MHz FSB
256K L2
1.7v Core

The only difference I see is . . .

SL4CD = FC-PGA
SL4MB = PPGA

Now, according to Intel, the PPGA is a Celeron. It ain't.

Somebody 'splain to me.

[butch81385]

and one comes oem as well..... now im confused!?!?!

also it says 370 pin ppga....

I just noticed the SL4CD says it comes packaged Boxed or OEM.

I'm gonna have to pop 'em in and run CPU-Z. I'll post a screenshot.

[Kc2iLq]

PPGA- Plastic Pin Grid Array
FCPGA- Flip-Chip Pin Grid Array
They are both socket 370 and are interchangable up to 533MHz. The only difference is the core voltage. PPGA chips stop at 533MHz, so I'm not sure what the deal is with the second chip there. Unless Intel made that chip for a specific reason to run at a higher core voltage, it it probably a mistake.
Sorry I don't have much more insight on this.

-Kc2iLq

[Jon11582]

Pentium III's never came PPGA as far as I know. All PPGAs made were Celeron's (up to 533Mhz), and were also made on a .25um process.

Pentium III all came in either Slot1, as they were at debut, or FC-PGA after the move to the .18um Coppermine core. Its weird that they would stick one in PPGA at the 800Mhz range since theres no process switchover at that speed, and since they had a perfectly good FC-PGA packaging going on for thier .18um chips.

Im thinkin' its a typo.

The voltage switchover for PPGA to FC-PGA is because of the change in manufacturing process from .25um to .18um. Flip chip just means they physically flipped the chip so its contact side is on top. They did this for direct contact with the heatsink, leading to better cooling for the hottest part of the processor.

I think they would have had to modify an existing fab machine into something that they never had to make a .18um PPGA chip.
If this isnt a typo, the ONLY thing I could think of is that some manufacturer requested special 800Mhz PPGA chips. As most of you know from the PIII FC-PGA times, and the current athlon, Flip chip designs can be fragile and chip and crack from unproper installation or handling of heatsinks. Maybe they were testing out a PPGA process on the P3 to see if they could unflip it, protecting the chip, and still maintain the cooling. If this was the case, it probably failed, since the rest of the chips were FC-PGA's after that, until they reached FC-PGA2, with that little metal heat spreader that spreads the heat and protects the fragile chip.

If none of that made any sense to you, no problem. You said you physically had the chips right? If they both look the same, which is the most likely case, then thier both FC-PGA and Intels webmasters need to proofread thier work better. If the chip that claims to be PPGA has a dull top and a shiny bottom, then that ones actually PPGA and you have a rarity on your hands, an actual PPGA P3 which I never thought was ever made.

CPU-Z sees them both as "Socket 370 FC-PGA". It also shows them both running at 1.664 vCore. I'm'ona'hafta investigate that.

EDIT - It's definately NOT a PPGA. It looks just like all the other FC-PGA's laying around here.

[Jon11582]

EvilRick, Kc2iLq & Jon - 1
Intel - 0

Id say these two are exactly identical and are probably just different batches within the cC0 stepping.

If your going to clock them, you may want to check overclockers.com's database for these batches to see which one clocks better. Chances are thier very similar. If your not clocking, then shuffle and pick a chip.

[John Prophet]

800MHz
133MHz FSB
256K L2
1.7v Core
-------

that much there tells you it aint a ppga....as Jon11 said...no ppga's past 533ish and I dont think there were any ppga's near 133mhz fsb (well, not MEANT to be, from the factory, hehe)

Intel typo