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decentbloke
aus UK
offline
OC Newbie
20 Jahre dabei !
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Aaaargh! Wonderful though it is, reading all this stuff has put my head in a spin. I've just acquired a Shuttle SN41G2 SFF system (version 1) and I'm looking for a CPU that will give a decent balance between speed and cool (=quieter) running. The XP-M 2500+ looks good, but the SN41G2 has no provision for adjusting the multiplier or vcore, only FSB up to 200MHz. Reading around, it looks as though desktop mobos interpret the XP-M's stock vcore instruction (VID) as 1.575V, rather than the 1.45V set by a laptop mobo - see the table at http://www.cpuheat.wz.cz/html/AXP_multiplier/AXP_Multiplier.htm
This seems to explain bunny's "wrong" vcores when using the pin mod alone to set at 1.65V and 1.75V by pinmod.
So, I guess the CPU would get 1.575V by default in the Shuttle unless I apply a mod to allow it to be set lower, and that to set vcore at less than 1.575V I would need to cut L11 and apply a pin mod. Is that correct, please?
With L11 cut, will the Shuttle read the XP-M's VID as if it were a desktop or mobile CPU, as in the table at the linked above?
Also from what I've read, the XP-M will boot initially with a low multiplier (6x?). With no multiplier adjustment by jumper or BIOS in the SN41G2, it looks like the only way to set a higher multiplier is to apply a pin mod. That's no great problem, but at what should I set it? Taking out the CPU and changing the pin mods for multiplier (and maybe vcore) looks like a hell of a way to find that nice compromise between speed and quietness by trial and error. Any ideas what multipliers I might be able to use comfortably at 1.475V (lowest in the pin-mod selector) and at 1.575V (default)?
Or should I just buy a desktop 2500+ ??
Finally, anyone know what PCI bus frequency would be at 200MHz FSB and (say) 190MHz on the SN41G2?
Any thoughts or advice would be welcome, especially if based on experience. Thanks.
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Beiträge gesamt: 3 | Durchschnitt: 0 Postings pro Tag
Registrierung: Okt. 2004 | Dabei seit: 7357 Tagen | Erstellt: 18:56 am 4. Okt. 2004
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ocinside 
aus Krefeld
offline
Administrator
23 Jahre dabei !
Intel Core i9
3600 MHz @ 5200 MHz
78°C mit 1.552 Volt
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First of all welcome to the ocinside.de board, decentbloke 
The first decision you have to make is if you like to overclock by software or with the bridges/pins.
Of course it's easier to overclock by software if you mobo is supported, but you always have to start the software via command line, etc. instead of having a fixed multi/vcore.
So if you buy a new barton, t-bred, etc. which is manufactured after the 39~43 week of 2004 there's at this time no choice - you have to change it into a mobile one and overclock it by software and/or overclock it over the FSB.
And if you buy a mobile processor, you have the choice of using the software, or unlocking the CPU and set the mobile to a desktop CPU (don't hesitate to look at my last Barton/T-Bred painting guide where the mobile Vcore is explained with the bridges) because the mobile processors still don't have the new multi lock.
Of course it's a matter of the processor price and of the used mainboard chipset (nForce2 boards don't work with the software, yet).
So don't put your head in a spin, just think about the first steps and about the money you like to spend 
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Beiträge gesamt: 170924 | Durchschnitt: 20 Postings pro Tag
Registrierung: April 2001 | Dabei seit: 8610 Tagen | Erstellt: 20:30 am 4. Okt. 2004
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