Intel P4 forced to run at 533?

[Tor]

Does anyone know how to force an Intel motherboard to run at 533FSB? When you go to the maintenance mode in BIOS the only option is for multiplier change. I heard somewhere that you can remove a resistor or something on the motherboard to force it to run at 533. Just curious if anyone knows, would like to get my buddy's 2.4B running at 533 instead of 400, his RDRAM PC1066 is also only running at 800 and I think if I can get the FSB to 133x4 it will get his ram running at 1066 also. Thanks.

Tor

[BipolarBill]

I don't think that I want to help you blow up your buddie's PC. You should think twice about this.

If I was as concerned as you are, I would buy him a 533 mobo for the holidays.

[Tor]

So you know what I'm talking about? We're not concerned about blowing it up. We work on hardware for a living, so a motherboard mod is not a big deal, and if he blows it up, then he can get another one but why not try to use the one he already owns? He's kind of particular about having an Intel mobo the only prob is the fact that Intel boards don't have the FSB options and the chip is a 2.4B but the board defaults to 400FSB instead of 533. Dam unlocked chips!

[BipolarBill]

My point is that it's not a 533-capable board - period. Asus, Abit, EpoX and MSI also made them, but those have options above 100MHz memory/133MHz FSB for OCing. The Intel doesn't. A modded BIOS may help, but I doubt very seriously if Intel was dumb enough to leave a jumper onboard for this. Even if they did, you would still need a BIOS to control it.

Intel makes such nice, stable motherboards that it would be a shame to see one go up in smoke... :(

[Logan[TeamX]]

Bill has a point. We did this with a few P4 1.6 or 1.7s... willy cores. The ECS P4S5A O/Cs so easily... it's not funny. We had them running at 2.26 GHz for a few hours... they benched like crazy!. Sadly, we turned them back down, although they would have run nicely for some time methinks.

Get a good O/C board :)

Logan

[Tor]

They do make great stable boards. Which is why my buddy is so particular about having the Intel Board. I guess what I'm getting at is it IS a 400/533FSB board. But the board detects the 2.4B as a 2.4A for the same reason that the cheap Mobo I asked you about earlier defaulted mine to 1.2 and wouldn't change the multiplier, but his Intel board can change the multiplier just not the FSB. I did get a Soyo P4S Dragon and now i'm running 142Mhz X 18 for 2.55Ghz! Wohoo! Anyway he wants to keep the Intel Mobo but get the correct FSB for his chip and his PC1066 RDRAM. And I heard somewhere that there is a resistor or something that correlates with the pin on the processor that is supposed to be fused to autodetect the FSB that you can take off to "trick" the motherboard into thinking that it autodetected the 533Mhz FSB. Anyway I'm pouring through some Intel Tech specs right now for the i850E motherboard to see if I can't find something.

Tor

Edit: What fun is working on computers if you can't mod? Or see the occasional poof of magic smoke? :confused:

[BipolarBill]

Let me get this straight. This is a 400/533 motherboard and CPU and it's not detecting the CPU properly? Man - this sounds like an issue for Intel tech support, not diagonal cutters.

[Tor]

Its unlocked CPU. Same deal I had with mine, the chip isn't fused for the multiplier or FSB so the motherboard defaults to lowest FSB/Multiplier. With maintenance mode in the BIOS he changed the multiplier to 24 with the 100x4 bus. We're trying to get it to go to the 133x18 to get his PC1066 working at 1066 instead of 800. Looking for that "magic" pin that tells the mobo what FSB to use. It's gotta be simple, either a hi or a lo signal.......... 133 or 100. I got mine up to 2.61Ghz from 2.4 just now! This overclocking thing is fun, just to see where you can go! :)

[BipolarBill]

Oh - it's a beta CPU. In that case, using it in an Intel mobo is sorta like putting a champion jockey on a mule. :p

[hangtown]

I thought it was a pretty simple question - the Intel motherboard is no mule, not many companies can do the type of validation Intel does. The only problem is the combination of the unlocked CPU with it.

So I'll assume either Bipolar Bill does not know how to make the mod, which is fine, because I don't either.

AFAIK, there is a mod that can be done, changing a resistance on the MOBO to do this. I'm just curious as to the specific location the mod needs to be made to. The physical act of making the mod may or may not be a problem, it depends on what the mod actually is. If it's a matter of jumpering or soldering, it's not an issue. It can be done w/o any problem.

PS. The Intel D850EMV2 is a 533 capable board, contrary to statements in this thread.