OC a PIII Coppermine

xComputerManiacx

Senior member
May 8, 2004
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I have a MicronPC Millennia with some unknown motherboard (model is 694X-596B-977). It has a PIII 666EB CPU with 3x256MB Crucial PC133 RAM. The RAM timings are: 3.0 clocks CAS Latency, 3 clocks RAS to CAS delay, 3 clocks RAS precharge, 6 clocks cycle time (tras). All stats provided by CPU-Z
 

JSSheridan

Golden Member
Sep 20, 2002
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I have a Coppermine 700 clocked to 933 on a P3V4X. Since your FSB is already at 133MHz, I think you'll be limited by your memory. Also, I don't know if your system has a 5:1 divider or has an async AGP/PCI clock. Check stability with memtest86 and prime95 after you've oc'd your system. Peace.
 

3chordcharlie

Diamond Member
Mar 30, 2004
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best bet is to find someone with a 500-700 mhz p3, 100fsb, and trade. They'll get a little faster stock chip at the higher bus speed, you may be able to get it back up to 133fsb by overclocking and achieve something close to 1ghz. But there aren't as many P3s around as a couple of years ago, so it's a bit of a long shot.

If I remember my sdram, you aren't likely to get far past 150fsb, and you'll probably need new ram to do it.
 

xComputerManiacx

Senior member
May 8, 2004
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Sounds like I wont be able to get much of an overclock with a PIII EB. :(

BigBadBiologist, I like that idea. If I'm reading that correctly, all I need is one of those Celerons and that socket adapter and get over twice the speed increase without replacing my motherboard or RAM. I can't decide on whether to go with the 1.1GHz (for the almost guaranteed functionality) or the 1.3GHz (for the fastest speed possible). I guess 1.2GHz would be the most likely answer then...
 

BigBadBiologist

Platinum Member
Nov 30, 2002
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I had a 1.1 that did 1466 and was maxing out my mobo at defgault voltage. I think these things have some serious head room. You can get the 1.3's at newegg for $39. Every once in a while, the 1.1-1.2's show up in the FS section for around $30-$35. Good luck finding one!

Oh yeah, they are very fast.
 

xComputerManiacx

Senior member
May 8, 2004
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Since you sound like you done this before BBB, can you tell if this has a 80+% chance of working? I just ran Aida32 and got the following specs for my desktop. I can add more specs if you need it.

Motherboard:
CPU Type Intel Pentium IIIE, 667 MHz (5 x 133)
Motherboard Name Unknown
Motherboard Chipset VIA VT82C694X Apollo Pro133A

Processor Properties:
Manufacturer Intel
Version Pentium III
External Clock 133 MHz
Current Clock 667 MHz
Type Central Processor
Voltage 3.3 V
Status Enabled
Upgrade Slot 1
Socket Designation SLOT 1
 

BigBadBiologist

Platinum Member
Nov 30, 2002
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The main issue is that you'll probably have to use a Powerleap Slocket Adapter. I've gotten Tualatins to run on BX mobos using one of these; a Via Chipset mobo should be ok. The powerleap adapters are nice because they allow manual voltage adjustment and they allow you to set the FSB to 133 MHz without modifying the CPU or socket or anything. You should be able to find one on eBay for pretty cheap.
 

BigBadBiologist

Platinum Member
Nov 30, 2002
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from the software thhing, it looks like you'll need the slot adapter. First, open your case and see if your CPU is in a socket or slot config. Then we can figure out what you need.
 

xComputerManiacx

Senior member
May 8, 2004
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I'm pretty sure its a Slot 1 CPU. But then again, it's been over 3 years since I checked. I'll pull off the HSF this weekend and double-check, just in case.
 

xComputerManiacx

Senior member
May 8, 2004
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Yup, its a Slot1. The mobo also has room for a PGA370 as well (sorry, totally forgot about that!).

Any idea if I can just stick a Celeron 1.3 T-Core in the 370 and run it at 133 FSB (without any adapter/modifications)? Any potential problems with trying this other than just frying the CPU?
 

BigBadBiologist

Platinum Member
Nov 30, 2002
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Frying your CPuand your mobo. If it has a 370 socket, you can just get the cheapo adapter thing and do the mods. The mobo will probably work. (just make sure you remove the original processor)