parhelia voltage mod finished

[CaineTanathos]

don't forget that AMD also released some DX4's

[funky-d-munky]

"The reasoning behind this was how difficult it was to mod the chips (something that didn't happen by vendors in the day) and that Intel was the only vendor supplying chipsets that supported these cpu's (no FSB adjustments).

Adjustable FSB's only came into being when Intel's chipset had competition which could do it. This occured in the mid P2 era "

I used to o/c Pentium I's all the time. Every socket 7 motherboard I ever saw had the basic multipliers which used to have those half #'s like 2.5 ect. and standard fsb (60, 66 and many 75, 83)

You could always work out some sort of o/c being fsb or mult.

Yes the great abit BH6 was the first Great o/c board. I still have one running a 100bus 450 celeron. These boards offered Voltage adjustments as the new feature for the PII era.

[Greebe]

The only issue I have remembering all this stuff is the amount of info it is after 19 years of OCing

[Fender]

Originally posted by Greebe
The only issue I have remembering all this stuff is the amount of info it is after 19 years of OCing

in all these years, some memory has been lost

[Kurt]

Originally posted by funky-d-munky
"The reasoning behind this was how difficult it was to mod the chips (something that didn't happen by vendors in the day) and that Intel was the only vendor supplying chipsets that supported these cpu's (no FSB adjustments).

Adjustable FSB's only came into being when Intel's chipset had competition which could do it. This occured in the mid P2 era "

I used to o/c Pentium I's all the time. Every socket 7 motherboard I ever saw had the basic multipliers which used to have those half #'s like 2.5 ect. and standard fsb (60, 66 and many 75, 83)

You could always work out some sort of o/c being fsb or mult.

Yes the great abit BH6 was the first Great o/c board. I still have one running a 100bus 450 celeron. These boards offered Voltage adjustments as the new feature for the PII era.

What do you mean by "adjustable fsb"?

Pentium 1 boards could go up to 83Mhz, usually via jumpers. Then you got the Super7 that would do 100MHz+.

[Kurt]

AFAIK, they started to to play around with multipliers with the DX2 chips. Infact, that was the novelty. Running the chip at two times the bus speed wow! great! new!

...and so we started to see diminishing returns on the fsb/chip comunication efficiency (you can see the same results with the fsb/memory speed, and hence why you get better results when running things in sync...).

Actually we should all hate them for imposing on us the "multiplier principle"...

[funky-d-munky]

Kurt who are you asking? You quoted me quoting Greebe.

[Kurt]

Originally posted by funky-d-munky
Kurt who are you asking? You quoted me quoting Greebe.

I guess it must be Greebe then

-I was tired, didn't notice I replied to the wrong post ooops

[rylan]

I thought DX4-100 ran off a 25MHz bus, because I know some people who bought DX4-75s, and only way that makse sense is 3x multiplier with 25MHz bus. *scratch*

[Wombat]

A DX4-100 would indeed be a 25MHz bus. I had a DX4/133. I think I remember seeing people take DX4/100s and running them at 3x33 though.

[funky-d-munky]

Wrong. The DX4 chips were a clock tripled (3x multiplier) There never were any 4x multiplier 486's.
funky

[Roark]

incorrect. there were 4x multiplier 486's. I have one sitting on my desk right now.

They were known by two names - the 486DX5-133 or the 5x86-133, it all depended on who you talked to. I know they were marketed under the 5x86 name.

I already mentioned them earlier in the course of the conversation.

the speeds of the 486's are as follows: 486(DX)-25/33, 486SX-25/33, 486DX2-50/66 and then the DX4's were 75 and 100Mhz coming from intel. AMD had DX and SX chips running at 25, 33, 40 and 50MHz (rare), DX2 chips running at 50, 66, 80 and 100Mhz (also rare), DX4 chips running at 75, 100 and 120 Mhz, and then the DX5 chip running at 133 Mhz. There were also assorted overdrive chips that ran at various speeds.

All 486/DX/SX chips used a 1x multiplier, the DX2 chips used a 2x multiplier, the DX4 chips used a 3x multiplier, and the DX5/5x86 chips used a 4x multiplier.

Edit: I also forgot about the 487SX chips which to my knowledge only ran at 25 and 33 Mhz, they might have done an SX2 though...

Edit #2: There was a 20Mhz version of the 486SX that i forgot about. To my knowledge there is no other Intel produced chip that ran at 20Mhz in the 486 line. rumor also exists of a 16MHz version, showing just how closely tied to the 386 this platform really was. I however have not been able to find any sort of offical documents verifying that they did release a 16MHz variant. I have also pretty much confirmed that there was an SX2 released at 50MHz and 66MHz that were produced by AMD. Unknown if Cyrix or Intel ever produced them.

[Wombat]

Funky,
I definitely had a DX4-133. 4x multiplier, at 33MHz, and that was stock, from AMD.

Also, I had an Aptiva that came with a passively-cooled Intel 486 SX2-50.

[funky-d-munky]

The DX4 chips that used a 4X multiplier were known as the 586's. None of which were Intel. We can argue about that but who really cares? I was just correcting Wombat and Ryan about the DX4-100.

Roark you forgot the Intel DX-50. The best in its day.

[DentyCracker]

DX4 was 100MHz, and I remember them being 33x3 and wondering why they weren't called dx3