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Wasn't there a Sempron S754 overclocking thread?

Agreed about the x9 multi ,that's why I choose the 3100 as well as its bigger cache.Though I wouldn't say the bigger cache is that critical ,if I recall rightly it gives about a 5% boost.I wanted the bigger cache for running DC apps ;).

Btw I got my 3100 upto 2.52Ghz when the PC just rebooted itself in windows.Turns out the cheap casecom 350w PSU I was forced to use (the decent one it had suddenly decided it wasn't going to boot) wasn't upto the job.I tested it with a meter & the 12v line was dropping to 11.6v under load at 2.39 GHz! :rolleyes: .
So until I RMA the 400w PSU I'm stuck at 2.4GHz ,I'm sure it'll go loads higher though as its still at stock volts.
Oh & I also tested the max FSB of the mbrd ,it hit its max at 300FSB! ,far more than I'd hoped for!:D (though admitidly that was just a quick 20mins P95 test).
I got the RAM (Crucial DDR400) upto 240MHz ,at which point I ran out of time to do further testing.

Are thier any advantages to the mobile chips? lower voltages?

Kona ryan
No probs
You must have changed something :p ;)
 
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I had a s754 Sempron 3100+ before I upgraded to my current rig. It was a really early one, 130nm (can't remember the stepping tho). Had that on a DFI 250Gb running at 2.53Ghz with both the stock cooler, and later with an Evo33. It needed quite a voltage boost before it got there tho; CPU-Z was showing about 1.65v to get it stable, and that made it quite warm on the stock cooler (65-67 degrees fully loaded). The Evo33 sorted that out, taking it down to about 50-53 fully loaded :)

A friend bought a 90nm (possibly E3 stepping if I remember correctly) and that's good for 2.6-2.7Ghz.

My s754 was a bargain, and an overclocking legend! :) I'd recommend buying one now if someone wants a bargain PC and wants to overclock it a bit.
 
What no answers? :p

My 3100 is still being held back by a cheapo PSU ,the replacement 400w PCIcase PSUs were both dead! ,wtf!?? :mad: ,don't get those ,it seems they have a duff batch atm!
So I'm still awaiting a PSU :(

Anyone else overclocked Semprons lately?
 
Default volts are 1.45 IIRC. I have a 2800+ at 2600Mhz (1.52v Zalman 7000CU)and just won't run stable at 2700 no matter what I give it in my main machine (DFI NF3 UT 250GB) and a 2600+ @2000Mhz (stock volts and cooling) in my Media Centre (Asus K8N) which would be higher but the Asus doesn't allow voltage change on Semprons. I have an MSI Neo Platinum which I know runs at HTT of 325 which is 2.6 on either chip :)

Their value for money is only overshadowed by Opterons but since I have no pot to widdle in I'll have to make do with these Palermo's :)
 
2.6GHz is a nice overclock :cool:
Def vcore is 1.4v

Btw my Sempron rig is running an Asus K8N ,I can alter the vcore over a wide range:)
Are you sure you haven't just missed the option to enable it?
I actually lowered mine as the Asus K8N over volts the cpu (typical Asus :p) ,I set it down to 1.375 (IIRC) to give 1.4v
 
maybe needs a bios flash :)


i have a mobile 1 of these sat here, probs dunt work so never got a board, shame really, tbh these seem to be clocking a bit better than the current venices :D
 
The problem is that you must have cool n quiet enabled to have Vcore adjustment and since I flashed it to recognise the Sempron it also seems to recognise that the Sempron does not have C&Q. Hence, no Vcore adjustment.

Thats my theory anyways. I would have to flash it with an old BIOS and I haven't even bothered to look for one, too lazy.

Of course if I'm wrong then please let me know. Perhap assimilator you could let me know which BIOS you are using?

Hey M3 :) When you say mobile you don't mean one of the really nice Turions do you?
 
Ah I think I might know what it is.

Though I haven't confirmed it someone told me that C&Q is only enabled on Semprons from 3000 upwards ,that might explain why I can increase vcore & you can't.Though TBH I don't see why C&Q should make any difference to being able to manually adjust the vcore *shrug* ,so not sure ;)

My bios version is 1009 ,C&Q is disabled

To enable manual vcore adjustment you need to set 'AI overclock Tuner' to 'Manual' & set 'FID/VID change' to 'Manual' too.
Have you done that?
 
Assimilator1 said:
Ah I think I might know what it is.

Though I haven't confirmed it someone told me that C&Q is only enabled on Semprons from 3000 upwards ,that might explain why I can increase vcore & you can't.Though TBH I don't see why C&Q should make any difference to being able to manually adjust the vcore *shrug* ,so not sure ;)

My bios version is 1009 ,C&Q is disabled

To enable manual vcore adjustment you need to set 'AI overclock Tuner' to 'Manual' & set 'FID/VID change' to 'Manual' too.
Have you done that?
Click to expand...
I knew about the AI has to be off but whats FID/VID? what menu can it be found it? the same one as AI?
 
Yes

I just found this in an Asus FAQ
Due to the CPU's limition, FID/VID adjust option will be hidden in BIOS if system detect user installs those Sempron Processor which can not support Cool 'n' Quiet function.ex: Sempron 2600+ or Sempron 2800+.

That's daft! :(
 
Assimilator1 said:
np
Why an old bios?
Click to expand...
Figured if I use an old bois (pre C&Q) it should have VID available for any CPU but I tried it and no good. Which page is the VID adjustment in? Jumperless config presumably?
 
Assimilator1 said:
Yes ;)

I really don't get why vcore can't be adjusted without C&Q :confused: ,afterall all previous CPUs didn't have C&Q & you could adjust their vcore!
Click to expand...

Thats why my logic lead me to try older BIOS

Oh well, I have to pull pull out the 6800le and replace it for a 6200, whilst I'm there I spose I can change the mobo for the MSI Neo Plat I have tucked away in a cupboard here.

Damn Asus trying to be clever. Prety dumb really :rolleyes:
 
I still don't follow you why an older bios should make any difference though ,never mind ;)

Btw re the Asus FAQ, it blames the CPU for the vcore limitation,that would appear to be a bald face lie! ,as AFAIK other manufacturers do not have this problem!.
(I guess you found that out too Nutbusta? ,just wanted to spell that out to other readers).

Update on my rigs overclocking.

Finally got a decent working PSU!.
Currently got my Semp 3100 @2.51GHz :) with ~1.44v (1.425v setting) ,I tried higher but these mbrds seem to have another vcore limitation :rolleyes: ,no matter which setting I choose over 1.45v the voltage never goes over 1.46v :mad: ,so that is limiting overclocking somewhat.
I was hoping for 2.6-2.7GHz but 2.51GHz isn't bad ,so I'll live with it ;)
 
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