FSB 800mhz to 1066mhz?

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winstontj

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Apr 4, 2009
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Is there a way to configure or allow the FSB to run @ 1066MHz from 800MHz? The tech specs of my mobo say that it will run at 1066 but the old CPU ran at 800mhz so I'm having trouble using the new CPU. Is there a way to reset it or allow for the higher speed/rate?
 


Have a dell Optiplex 745 PC with Q965 chipset. I am trying to install an E7400 CPU but the E7400 runs on a 1066MHz FSB while the old processor (Pentium D) operates on at 800MHz - some individuals on here are saying that a BIOS flas will upgrade/allow the FAB to operate at 1066 while Dell is telling me that although all 745's have the same Q965 chipset - that my PC's mobo is limited to 800MHz.

Wondering if there is a setting or way to change the 800mhz setting up to 1066 or is that not possible?

thanks for the reply.
 
Since Dell already confirmed that it can't be done with your motherboard, then your only option is to get a new motherboard. A quick search for "Dell Optiplex 745 motherboard" returns several different motherboards. Which one do you have? Having that info would be very useful if you're looking for a hacked BIOS (flash it at your own risks) that would let you run a FSB 1066 CPU.
 


Just because a Dell tech says anything doesn't mean they are correct - these are the same guys that told me a Q9550 would work "plug & play"...

I have no idea what MB i have - I know it's an Intel Q965 chipset but I also know that the 800mhz and the 1066mhz mobo's both have Intel Q965 chipsets. The Dell guy today told me that I'm looking for a CX532 (dell part #) mobo- but again I don't really believe anything they say.

I guess what I was asking is because the motherboards all have the same chipset is there a way to either run the BIOS from a 1066mhz FSB mobo or is there a way to configure my FSB to run @ 1066mhz?

I know most of you guys hate Dell because they suck in general and things aren't configurable, etc. but I'm stuck here - something tells me that going to dell.com and buying the "suggested upgrade part" is going to only cost me money for misinformation. I have no idea how to differentiate between what I have and what I might need, or how to configure what I have to work with an E7400 processor.

does that give enough information on what I'm trying to do and what hardware I have?
 
well it all comes down to the fact that the bios on that mobo is locked, ie you cant change anything that's important. So you'll need to get a hacked bios (if there actually is one available somewhere in the interwebs), but for that you'll need to know the exact model of your mobo to get the bios version that will actually work with the mobo. If you flash wrong bios, it'll really mess it up...
And looking for a hacked bios for a dell might be a little risky business, hope you have good antivirus software running lol

anyhoo, those E7400 cpus are made at 45nm, and need sophisticated power circuitry on the mobo, which i believe yours dont have

the easiest way: buy a new p45 mobo, and oem copy of windows...
 
does that give enough information on what I'm trying to do and what hardware I have?
Click to expand...
Unfortunately not. As kari also said, you need to find the exact motherboard that you have. A part number should be visible somewhere on it. If you can't figure out what motherboard you have, then you can't get a hacked BIOS for it (assuming that one meeting your requirements exists).

You already know that Dell might not have lied to you about the FSB - you installed a FSB 1066 CPU and the motherboard runs it at 800. I presume that you flashed the latest BIOS to make absolutely sure that it won't support the 1066 FSB using a Dell BIOS.
 


Yes I did flash to the latest BIOS version - i'd like to find a BIOS version for a dell 1066mhz mobo with a Q965 chipset and see if that works - I think it will but Dell doesn't want to offer that up, they'd rather sell me a new mobo. I don't know... this whole thing is a disaster and I'm very close to just ordering a new system.
 
Umm, you realize that if you flash a bad BIOS, your done right? This isnt like your HD which you can format and start over. Once you put an incorrect BIOS on, its game over, you have a large expensive paperweight.
 
On Dell's site, they seem to provide a single BIOS for that system. You could find out from Dell which motherboard meets your requirements and then buy it used on eBay.
 

Thank you - that's the route I'm going. They gave me Dell part # CX532 as the mobo that runs a 1066mhz FSB. Hopefully there are some out there on Ebay and hopefully they are not very expensive.
 
I have worked for and with Dell for a number of years. There are limitations you have to deal with, and plenty of things about them that annoy me, but if you were talking to one of the business reps (Dell Small Business), they usually know their stuff. I also know that Dell is notorious for "customizing" their motherboards. I would say the odds are highly in favor of needing to find the specific mbo the Dell rep recommended.
 

I'm getting quotes in the $250 range for a used/refurb mobo for that machine - and I need two of them. There is no way in hell I'm going to shell out $500 for two mobo's and then the additional $100/ea for the E7400 CPUs - $600 would buy me a pair of E8400 Core 2 Duo Optiplex 755 machines (or better).

I guess I'm SOL - thx for the help though.
 

I'll just wait for it to blow up - all of our machines are almost out of warranty and we're having hard drive failures on a weekly if not daily basis, CPUs are starting to die, etc. etc.

I think I'll hold out till August for a T5400/T5700
 
LOL, your warranty's are running out and the machines are having issues, yet your still going to buy from them again. I quess your not the brightest bulb in the bunch.

If its that important, buy a cheap $50 or less case and a $50 motherboard, and reuse your other stuff, and you will be good to go. You will also need a copy of Windows if you go this route, yuor Dell disc will not work, and you cant drop the HDD from the Dell onto a new mobo without reformat.


Your talking about changing CPU's so if your comfortable with that build your own PC, its not hard and you can get your questions answered here.

Dells come with FSB's in the 800, 1066, and 1333 flavors. The PC's I build come in the 1600, 1800, and 2000 flavors. Big difference in speed and basically the same if not better parts then Dell uses. You notice a big difference in speeds from 1333 FSB to 2000 FSB.
 


maybe so for our IT department who buys from Dell but not so for me... Junk or no junk... as long as I stay Dell I don't pay a dime (personally) for my computers...

We have 180+ employees spread across 15 offices and another 20+ remote/home workstations. If my home PC wasn't free i most certanly would have built out a custom rig but why pay for that when I have a free one? For the setup that our company has (though it seems ghetto at times) our Dell 5-star/gold star whatever service package works for us. We don't have IT staff in every location, most things are remote suport and there are only a handful of us that are special and require soemthing different from the rest of the firm.

I was hoping that this would be a quick & easy fix to hold me over a few months until we replace much of our hardware but since it's neither quick or easy I'll just deal with what I have.

For most individuals what companies like Dell have to offer doesn't make sense but for a large(r) company it does.

Thx for everyone's replies. I appreciate your time even though I feel like I wasted it since I can't accomplish what I was trying to do.
 


I never said I got free stuff from Dell I said that if my employer didn't give me the equipment at no cost to me then I would go out and build my own computer... but since it's free (to me) then why pay for something (custom build PC)?

seems like it's not in my or the company's best interest to waste any more time trying to upgrade the CPUs on these 745's so I'll put it to bed.
 
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