[Solved] 2.8ghz cpu running at 1.4ghz. Dell dimension 4500 - Page 2 - CPUs

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joefriday wrote :

The Dell 4500 will not support 800MHz fsb processors. You will need to find 533fsb cpus built on the Northwood core. The fastest available is the 3.06GHz Hyperthreading enabled Northwood. You can tell it is a Northwood because it will have 512kb L2 cache. I don't care what you said about the 2.8GHz cpu you have, it has to be an 800MHz fsb cpu for it to post at only 400MHz fsb.

If you want to have a little fun, break BSEL 0 pin off of the 2.2GHz Pentium 4 to make it into a 533MHz fsb cpu. That will make it run at 2.93GHz, which is doable on stock voltage. I'd say you have a 80% chance of it working, and it would almost be as fast as anything you could buy that would work in that Dell. Use the picture below as your guide. Ignore the 2.4gHz, your 2.2GHz cpu will run at 2.93gHz after this mod.

http://i93.photobucket.com/albums/ [...] /BSEL2.jpg

Hey Joefriday, I also found a 2A GHz P4 and I want to try this mod. Is there any other way than snapping the pin? I have a old ATA floppy cable can I cover the pin you highlighted to get a 533MHz OC? Thanks

Reply to N890

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Reply to N890

floppy cable, or any ATA cable is just too thick. As I mentioned briefly in this thread already, the insulation off 30 gauge wire wrap is perfect for the job. You can get a liftetime supply at your local radio shack for about $5.

Reply to joefriday

hi everyone

i wanted to comment that i tried the P4 2.2ghz pin mod on my dell dimention 4400, with ;

System chip set
Intel 845 with DDR memory support
DMA channels four
Interrupt levels 15
System BIOS chip 4 Mb (512 KB)
System clock 400-MHz data rate

and well it didn't really anything its working at the same speed

any pointers there joe?

thnx

Message edited by WLex on 10-20-2009 at 11:22:53 AM

Reply to WLex

I don't think the 845 chipset in the 4400 supports anything other than 400 fsb. I believe it has the early revision 845 chipset that lacks the 533 mhz fsb option that the Dell 4500/4550 offer.

Reply to joefriday

Ahh!! oh well there you go

thanks for answering so quick much appreciated, and thanks for all the great pointers its most enlightening

cheers

Reply to WLex

I have a hp d220 w/socket478. I had a celeron 2.4ghz and replaced it with a p4 2.8/512/800. Unfortunately the bus speed for that chip is 200mhz instead of 100 so the frequency only ran at 1.4ghz do to the 200mhz bus speed being cut in half leaving only 100mhz x 14 for the multiplier. I did the break off pin mod and it brought the FSB speed to 533 the bus speed to 133 giving me a frequency of 1.9ghz and also brought my ram bus speed up from 266mhz to 333mhz :bounce: which is what it is made to run since I have PC2700 333. I applied the voltage increase to 1.75v with the wire pin mod then increased the fsb with SetFSB which increased my CPU to 2.107ghz. Now I must ask is there a VID pin mod to increase the multiplier? Fingers are crossed. :??:

Message quoted 1 times
Message edited by Antischmegma on 10-22-2009 at 08:12:22 AM

Reply to Antischmegma

I stumbled on this thread a few weeks ago when I was googling to upgrade the CPU on a Dimension 4500 that was given to me. It looks like the thread kind of got revived so I just figured I'd add a quick note saying that I tried joefriday's pin breakoff on the P4 2.00GHz/400 fsb and it worked great. I powered up and went into BIOS and it shows 2.66GHz/533 fsb.

I had never done any overclocking before but this was quick and painless. A mechanical pencil works good as joefriday mentioned. About the only thing I would add is to be patient and keep wiggling it just a little bit. I started out wiggling too far and bent a couple other pins, but I was able to gently bend them back in place.

A couple questions:

1) 2.80Ghz/512/533 processors are pretty cheap on EBay. Other than the extra .14 Ghz, would it provide any benefit over the overclocked 2.00 running at 2.66?

2) I have a 2.80Ghz/1Mb/800 in my box of spare junk. Is there any way to make it run 2.80/512/533?

Message quoted 2 times

Reply to Rayman

Antischmegma wrote :

I have a hp d220 w/socket478. I had a celeron 2.4ghz and replaced it with a p4 2.8/512/800. Unfortunately the bus speed for that chip is 200mhz instead of 100 so the frequency only ran at 1.4ghz do to the 200mhz bus speed being cut in half leaving only 100mhz x 14 for the multiplier. I did the break off pin mod and it brought the FSB speed to 533 the bus speed to 133 giving me a frequency of 1.9ghz and also brought my ram bus speed up from 266mhz to 333mhz :bounce: which is what it is made to run since I have PC2700 333. I applied the voltage increase to 1.75v with the wire pin mod then increased the fsb with SetFSB which increased my CPU to 2.107ghz. Now I must ask is there a VID pin mod to increase the multiplier? Fingers are crossed. :??:

Please reverse that volt mod. you don't need it to run those speeds, and it will kill that poor northwood in short order. and, there is no mulitplier mod (SORRY).

On a side note, I find your user name disgusting.

Message quoted 1 times

Reply to joefriday

Rayman wrote :

I stumbled on this thread a few weeks ago when I was googling to upgrade the CPU on a Dimension 4500 that was given to me. It looks like the thread kind of got revived so I just figured I'd add a quick note saying that I tried joefriday's pin breakoff on the P4 2.00GHz/400 fsb and it worked great. I powered up and went into BIOS and it shows 2.66GHz/533 fsb.

I had never done any overclocking before but this was quick and painless. A mechanical pencil works good as joefriday mentioned. About the only thing I would add is to be patient and keep wiggling it just a little bit. I started out wiggling too far and bent a couple other pins, but I was able to gently bend them back in place.

A couple questions:

1) 2.80Ghz/512/533 processors are pretty cheap on EBay. Other than the extra .14 Ghz, would it provide any benefit over the overclocked 2.00 running at 2.66?

2) I have a 2.80Ghz/1Mb/800 in my box of spare junk. Is there any way to make it run 2.80/512/533?

Glad to hear it worked well for you. The upgrade to a 2.8GHz P4 would only offer a marginal performance upgrade, but at the same time, might be just the amount needed to make a slightly laggy HULU video experience into a smooth one. So, if you have $10 to $15 to spend, go ahead and try it, but if the 2.66GHz is doing the job fine right now, the 133MHz upgrade won't be noticeable.

Finally, the 2.8/1M/800 CPU will NOT WORK. The 1M in the middle of that name means 1 megabyte of L2 cache, which means that it is a Prescott CPU. Dell did not give the Dimension 4500 Prescott CPU support, which is why a Celeron D will also not work in the Dimension 4500. So, regardless if you could change the bus speed from 800 to 533 on a cpu (which you can, as made mention by the poster above you, but it will not run at 2.8GHz any more, because the 2.8 GHz is of course a 14x multiplier running on a 200MHz quad-pumped bus (200 x 4= 800mHz fsb), so 14 x 133 (533MHz quadpumped) is 1.86 Ghz), a Prescott CPU will simply refuse to post in a Dimension 4500.

Message quoted 1 times

Reply to joefriday

joefriday wrote :

Please reverse that volt mod. you don't need it to run those speeds, and it will kill that poor northwood in short order. and, there is no mulitplier mod (SORRY).

On a side note, I find your user name disgusting.

Thanks Joe. I will take out the volt mod. About my user name, Ive had it since I was 21. Thats 16 years. I have to keep it. It is I suppose it is a little disgusting ,but seeing how schmegma means butt funk, and I placed the "anti in front of it, it does mean against butt funk, so its not all that bad.

Message quoted 1 times

Reply to Antischmegma

Rayman wrote :

I stumbled on this thread a few weeks ago when I was googling to upgrade the CPU on a Dimension 4500 that was given to me. It looks like the thread kind of got revived so I just figured I'd add a quick note saying that I tried joefriday's pin breakoff on the P4 2.00GHz/400 fsb and it worked great. I powered up and went into BIOS and it shows 2.66GHz/533 fsb.

I had never done any overclocking before but this was quick and painless. A mechanical pencil works good as joefriday mentioned. About the only thing I would add is to be patient and keep wiggling it just a little bit. I started out wiggling too far and bent a couple other pins, but I was able to gently bend them back in place.

A couple questions:

1) 2.80Ghz/512/533 processors are pretty cheap on EBay. Other than the extra .14 Ghz, would it provide any benefit over the overclocked 2.00 running at 2.66?

2) I have a 2.80Ghz/1Mb/800 in my box of spare junk. Is there any way to make it run 2.80/512/533?

If you can find a p4 2.8ghz/512/400 and break off the pin it will give you 133X28=3724, thats 3.724ghz. I did it with my 2.4ghz/128/400 celeron as stated above in my first post and gave me 133x24=3192 or 3.2ghz. If your mobo supports Hyper Threading, be sure to get a cpu with it it helps so much. The p4 will be kind of hard to find with hyperthread at that bus speed, but it will show up on ebay.

Message quoted 2 times

Reply to Antischmegma

Antischmegma wrote :

Thanks Joe. I will take out the volt mod. About my user name, Ive had it since I was 21. Thats 16 years. I have to keep it. It is I suppose it is a little disgusting ,but seeing how schmegma means butt funk, and I placed the "anti in front of it, it does mean against butt funk, so its not all that bad.

Actually, schmegma (correctly spelled smegma, but pronounced more like the former) is the medical term for the cheese-like cellular debri that collects underneath the foreskin of the uncircumcised male.

Message quoted 1 times
Message edited by joefriday on 10-26-2009 at 05:26:54 AM

Reply to joefriday

Antischmegma wrote :

If you can find a p4 2.8ghz/512/400 and break off the pin it will give you 133X28=3724, thats 3.724ghz. I did it with my 2.4ghz/128/400 celeron as stated above in my first post and gave me 133x24=3192 or 3.2ghz. If your mobo supports Hyper Threading, be sure to get a cpu with it it helps so much. The p4 will be kind of hard to find with hyperthread at that bus speed, but it will show up on ebay.

I wouldn't recommend that pin mod. The D1 northwoods were only good up to 3.4 to 3.6 Ghz. Some could go a bit higher, but that pin mod is just asking for failure. Not to mention, the 2.8GHz/400fsb P4s were somewhat rare, being the fastest p4 available for 400fsb (there were a few 3.0ghz/400fsb engineering samples floating around a couple years ago, but I digress), they usually command a higher price. Really, the best pin mod candidates were the 1.8 and 2.0ghz C1 stepping P4s, and the 2.23Ghz/533fsb D1 stepping northwood. the 2.23 ghz unit could run at 3.4ghz/800fsb fairly easily. Also, if we take Prescotts into account, the Celeron D 310, 315, and 320 were all great overclockers, achieving 3.2, 3.4 and 3.6GHz overclocks, respectively. The 2.4A P4 (prescott edition) and 2.66GHz P4 prescott were also good overclockers, with 3.6 and 4.0 Ghz overclocks being easily achievable (with good cooling of course).

Message quoted 1 times
Message edited by joefriday on 10-26-2009 at 05:37:49 AM

Reply to joefriday

joefriday wrote :

Actually, schmegma (correctly spelled smegma, but pronounced more like the former) is the medical term for the cheese-like cellular debri that collects underneath the foreskin of the uncircumcised male.

This I understand,rofl, but the band I was in when I was 21 we all had screwed up screen names so I took the smegma word added the ch and declared it meant butt funk. Im still laughing at your reply, not many people know the actual meaning. Still roflmao. :lol:

Reply to Antischmegma

joefriday wrote :

I wouldn't recommend that pin mod. The D1 northwoods were only good up to 3.4 to 3.6 Ghz. Some could go a bit higher, but that pin mod is just asking for failure. Not to mention, the 2.8GHz/400fsb P4s were somewhat rare, being the fastest p4 available for 400fsb (there were a few 3.0ghz/400fsb engineering samples floating around a couple years ago, but I digress), they usually command a higher price. Really, the best pin mod candidates were the 1.8 and 2.0ghz C1 stepping P4s, and the 2.23Ghz/533fsb D1 stepping northwood. the 2.23 ghz unit could run at 3.4ghz/800fsb fairly easily. Also, if we take Prescotts into account, the Celeron D 310, 315, and 320 were all great overclockers, achieving 3.2, 3.4 and 3.6GHz overclocks, respectively. The 2.4A P4 (prescott edition) and 2.66GHz P4 prescott were also good overclockers, with 3.6 and 4.0 Ghz overclocks being easily achievable (with good cooling of course).

Im glad you mentioned that because I was trying to find one, so I guess ill try to find a p4 2.4/512/400 HT. Do you think that will be ok using the pin mod to achieve 3.2Ghz or should I try the 2.0? I do have a p4 2.8Ghz/1m/533 HT Guarun. Do you think I will see a difference between the 2.8 and the overclocked 2.4 at 3.2? What are your thoughts on the Guaran?

Message edited by Antischmegma on 10-26-2009 at 05:49:27 AM

Reply to Antischmegma

joefriday wrote :

Glad to hear it worked well for you. The upgrade to a 2.8GHz P4 would only offer a marginal performance upgrade, but at the same time, might be just the amount needed to make a slightly laggy HULU video experience into a smooth one. So, if you have $10 to $15 to spend, go ahead and try it, but if the 2.66GHz is doing the job fine right now, the 133MHz upgrade won't be noticeable.

Finally, the 2.8/1M/800 CPU will NOT WORK. The 1M in the middle of that name means 1 megabyte of L2 cache, which means that it is a Prescott CPU. Dell did not give the Dimension 4500 Prescott CPU support, which is why a Celeron D will also not work in the Dimension 4500. So, regardless if you could change the bus speed from 800 to 533 on a cpu (which you can, as made mention by the poster above you, but it will not run at 2.8GHz any more, because the 2.8 GHz is of course a 14x multiplier running on a 200MHz quad-pumped bus (200 x 4= 800mHz fsb), so 14 x 133 (533MHz quadpumped) is 1.86 Ghz), a Prescott CPU will simply refuse to post in a Dimension 4500.

Thanks joefriday. I think 2.66 is going to work well for me so I'll apply the $15 toward a "good" graphics card. First, though, since I've now become such an expert at overclocking (haha) I'm going to overclock the Geforce4 MX420 that Dell put in and see what it can take before catching fire.

I figured the 2.8/1M/800 CPU was going to be worthless but I thought I'd ask anyway. I was catching on to the multiplier connection between speed and fsb, but that cleared it up.

Thanks again for all your information on this thread. Everywhere else I looked for information about the Dimension 4500, people were saying "You can't overclock a Dell, period."

Reply to Rayman

Antischmegma wrote :

If you can find a p4 2.8ghz/512/400 and break off the pin it will give you 133X28=3724, thats 3.724ghz. I did it with my 2.4ghz/128/400 celeron as stated above in my first post and gave me 133x24=3192 or 3.2ghz. If your mobo supports Hyper Threading, be sure to get a cpu with it it helps so much. The p4 will be kind of hard to find with hyperthread at that bus speed, but it will show up on ebay.

I'd like to play around more like that, but the motherboard in the Dimension 4500 is pretty limited. It looks like the original poster's 2.2 GHz is the maximum candidate for overclocking, and even that was uncertain with this board.

Reply to Rayman

Joe, I have a question for you. I just recieved a P4 2.8Ghz 1m/533 s478 but it wont post. Im wondering if it has to do with the 1m cache. As my other posts say, I have an HP d220mt.

Reply to Antischmegma

Probably. HP may not have updated the BIOS for prescott CPU support.

Message quoted 1 times

Reply to joefriday

joefriday wrote :

Probably. HP may not have updated the BIOS for prescott CPU support.

Thanks for the fast reply. Im gonna ship it back. By the way, Is there a company that makes third party bios updates anymore? I know that micro firmware went out of business.

Reply to Antischmegma

In this day and age, I'll have to say "no". I'm aware of a forum that supports hacked BIOS, but I wouldn't hold my breathe while getting someone to help you hack your HP BIOS. Especially when the Northwood B series is pretty cheap nowadays, is just as fast, and runs TONS cooler.

Reply to joefriday

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