PIII 700 vs PIII 750

[Fig]

I ordered a PIII 700 slot 1 hoping to overclock it to 933 by bumping up the FSB from 100 to 133. My roomate asked why I didn't get the 750 instead, raise the FSB from 100 to 133 and get 1Ghz.

Will the 750's OC like that? I never see them discussed here...

[dadx2mj]

I just got a 750 last week right now it is running at 930 on a 124Mhz FSB with the vcore set at 1.80. At this point it will post but not load windows at 133Mhz FSB. After it has run stable at 930 for a while I will try it again probably have to bump the vcore some more. From what I have seen at the CPU data base you are probably better off with the 700 I don't know if it because they are used more or what but more people sem to have better results with them than the 750's

[[OC]_SR20DE]

Fig (May 02, 2001 08:32 a.m.):
I ordered a PIII 700 slot 1 hoping to overclock it to 933 by bumping up the FSB from 100 to 133. My roomate asked why I didn't get the 750 instead, raise the FSB from 100 to 133 and get 1Ghz.

Will the 750's OC like that? I never see them discussed here...


That's because your friend is a newbie.
P3 700 will beat the hell out of 750 in terms of OC'ing. If you go by maximum overclocking limit on the both processors, the odds are the 700 will eventually OC just as well or higher than the 750 and retain higher FSB than the 750. If you got the 700 cC0, that's even better. You should be glad you got the 700. You got the 700cC0 right?

[lightning]

yeah, go for P3 700!! if not u will regret what have u done!! i brought 2 P3 750, and now i oc it like hell!! they just so stubborn!! even after i add in 85W pelt, it just won't be stable at 1Gig!!! :(

[Wunder]

I am thinking about buying a 750 and run it at 133 MHz FSB. I cant buy a 700 cause them are no longer sold in sweden. I do believe a 750 can hit 1 GHz if only Vcore is increased enough, but can a FOP38 handle all that heat? Also i have no option to set AGP or PCI divider, i have a radeon vivo and a SMC EZ card 10/100. Think they will work with the high buses?

[Phil]

Don't be too sure about the 750 reaching a 133mhz fsb, theres a good chance but it isn't definate, I would really recomend finding a 700 from somewhere as at least you will be able to hit 933mhz and if you do get to 1ghz you will have a higher memory bandwidth than the 750 would

[Wunder]

ok ill try to get a 700, but what would i need? is default voltage and intel fan enough?

[Phil]

possibly, if they arent then I would recomend either the FOP 32 or the WBK 38 though this is a tad loud, I much doubt you would need more than 1.8v and you should not go over 1.9v.

[[OC]_SR20DE]

Wunder,

Some P3 700s can do 933@ default voltage or 1050@ few notches higher Vcore right out of the box. Those are considered to be good chips. My 700cCo did 933@ 1.80Vcore immediately.. and with NO BURN-IN, NO Lapping, No Alpha, No Globalwin, No nothing, just plane little home-made air cooling with case side open, mine did 1050@ 1.85Vcore.

And 1071@ 1.90Vcore currently. My chip is... "okay" , not the best of the good 700s but pretty darn good enough to do over 1Ghz real easyyyy. =0

[Mr B]

I read/heard a rumor that intel sifted and picked thru all the P/// 750's and took all of the really good ones and made them the 1 GHz EB chips.

Don't have any links or other info to back this up, but it sounds like something they'd do, alright.

They took the old C533a and have turned that one into the C800.....so there's probably some basis in fact at work here.

I'd go for the 700E myself....much better results have been obtained o/cing these chips. True enough, a 750E at 133 FSB puts it right at 1GHz, with the buses in spec, which is sweet, but I think intel has done this for you, and they want to charge you for it....

Mr B

[Wunder]

damned...
The 700s are nowhere to be found, not even used ones are sold... The 750s however are still sold by some vendors, allthough they're running out aswell. I only have the option to set FSB at 66, 100 or 133 MHz, nothing in between, nothing above... With that in mind, my only chance to hit 1 GHz is with the 750 (or the 850, but that would require lc and thats scary!), and seeing people do this with intel fan and default voltage encourages me! Think me go for the 750 after all. Im still worried about the speeded buses though, my radeon probably works with speeded agp, but will my SMC EZ card work with speeded pci?

[batboy]

Wunder, the chances of you reaching 1 gig with a 750 are slim if you're planning on using an Intel retail heatsink and fan, plus default voltage. I don't have any hard evidence, but I think Mr. B is right. The really good 7.5 X P-III chips are sold as 1 gig CPUs. To have a chance for a 750 to run stable at 1000 MHz, you're going to probably need much better cooling and an increase in voltage. Good luck.

[DaveB]

I read/heard a rumor that intel sifted and picked thru all the P/// 750's and took all of the really good ones and made them the 1 GHz EB chips.

Funny you should say that. Mr B, because I've been thinking the same thing. I've seen quite a few complaints about PIII 750's only going to 840 MHz or so lately. But, why wouldn't they also be cherry picking PIII 700's for PIII 933's? I would have to think that sales of PIII 933's must be much higher than PIII 1 GHz CPUs.

[PowerProtein]

There's no way that a P3 750 will reach 1 Gig. Do yourself a favor and get a 1.2 Gig athlon thunderbird (axia)

[MikeTimbers]

SL4CF, Philippines, Week 41.

1GHz at 2.1v (which is high, but wtf)

ThermalTake Mini Copper Orb runs full load (Genome) at 37C in

Lian-Li PC-60,
BE6-2 v1.0,
I-Will Slocket 2,
256MB Crucial CAS2 PC133,
twin 30GB 75GXP,
Herc GeForce 2MX,
Pioneer Slot 16X,
RealMagic etc.

[Phil]

Mr B (May 02, 2001 06:46 p.m.):
I read/heard a rumor that intel sifted and picked thru all the P/// 750's and took all of the really good ones and made them the 1 GHz EB chips.

Don't have any links or other info to back this up, but it sounds like something they'd do, alright.

They took the old C533a and have turned that one into the C800.....so there's probably some basis in fact at work here.

I'd go for the 700E myself....much better results have been obtained o/cing these chips. True enough, a 750E at 133 FSB puts it right at 1GHz, with the buses in spec, which is sweet, but I think intel has done this for you, and they want to charge you for it....

Mr B


Thats not quite true about the 533a's as there was never a cCO core 533 chip, now as for the 566->850 this is quite possible

[DaveB]

There's no way that a P3 750 will reach 1 Gig. Do yourself a favor and get a 1.2 Gig athlon thunderbird (axia)

You should take a look at the CPU database here. It is possible. Just not guaranteed.

[Door Knob]

PowerProtein (May 03, 2001 02:35 p.m.):
There's no way that a P3 750 will reach 1 Gig. Do yourself a favor and get a 1.2 Gig athlon thunderbird (axia)

If he has an intel board already than this isn't really an option.

[anvil]

I don't want to be judged as disputing a lot of good advice to be found here, but the 750 may be getting a bum rap. My 750, a retail box cB0, was purchased unopened a little over a month ago. To buy it I had to go against a lot of advice here and elsewhere. However, the database information just did not suggest a significant difference between the performance of the two chips, or any of the other high speed p3's for that matter. So I gambled on a retail box processor that was less than the 700 at the time.

It ran 900 out of the box and reached 968 (129 fsb) within a couple of days at 1.70v. After getting fresh memory it is now chugging, at 1000 (133fsb), through the Prime95 16 hour self test and it runs games without incident.

There may be something to be said for running the pci bus over 33 mhz and the fsb above 133 mhz. However, operating at 33 on the pci and 133 on the fsb do not stress the rest of the system if you have a good graphics card. This seems to promise a stable high performance system.

I'm with DaveB, there is no reason to believe that the 750e is treated differently from other chips. It is difficult to get any of the 100 mhz p3's above 700 to reach 133 because that is near the limit of the chip design, but if you can accept a slightly low pci bus, then speeds between 900 and 980 are probably as achievable as with a 700e. The catch is that the bus is running slow and memory is also slower than with an overclocked fsb. I doubt many would see a difference in program execution with a 7.5% overclock of memory alone (the 700 oc'd to 143 fsb or 1001 mhz), but they might experience some difficulty with a pci bus that is running very high or very low.

The 700 remains the safer overclock, but a successful 750 oc also yields a fine, stable high performance system, ... at least it is in my opinion.

Good luck, Fig, I hope you have as good an outcome with your 700 as I have had with my 750.


anvil

[Phil]

pity intel doesn't have a chip marking scheme like amd, imagine finding something like a p3 600 equivalent of an axia

[Wunder]

Me gotta test my system with a 133 MHz FSB processor before i buy and oc a 750. It would be a lot of money wasted if the rest of the system couldnt handle it. Remember i only got a "brand-name" computer with a Siemens-Nixdorf D1064 mobo, this has a BX chipset so i guess 133 MHz FSB would be ok but cant tell since it has never been tested.

[lightning]

Actually P3 750 are not that bad!! it just hard to get good chip to oc like P3 700. i had my 2 cC0 chip on hand now!! both of them can do 1 gig!! but not stable!! i need to bump the Vcore to 2.10V(mbm shows, but bios set at 2.05V) and had a good hsf like alpha!! somemore, need to do some burn in process with prime95 or folding @ home. now things change after i got my pelt!! it can even post at 1030MHz!!! final word, chances for oc P3 750 to gig are slim and hard!! and since there so many evidance show that P3 700 are far more easy to oc, so 700 chip are the best!!!! :)

[a700]

[quote]Wunder (May 03, 2001 06:18 p.m.):
Me gotta test my system with a 133 MHz FSB processor before i buy and oc a 750. etc...


Wunder you can buy a slot 1 p3 700 from
www.dataprince.se/
for 1998 SEK.

[anvil]

Lightning,

My 750 ran windows but was unstable at 1 gig until I got new Cas2 pc 133 from Crucial. That did the trick even though I had run voltage up to 1.85 v (1.88 v on mbm) with the old stick of pc133. With new memory it purrs at 1.75v (1.78 v on mbm). I did not play with the 3.3 v IO setting, but some say that makes a difference with memory questions. I will try it when trying above 1 gig, ... but actually, the gig is all I ever wanted since it has the on spec pci and memory.

Stable is good.

anvil

[lightning]

humm.....interesting!!! i run my w2k now with a generic PC133 128 ram. maybe that's the problem why i can't stable at 1 Gig!!! thank for suggestion ....anvil!!! :)