Shuttle AK31 v 3.1 fastest cpu

[buckshot23]

I want to upgrade my computer with a new cpu. My board is the Shuttle AK31 v 3.1. I currently have the xp 1600. The question is what is the fastest cpu my board can handle. I've been told on another board that I can handle an xp 2800 thoroughbred. These come in a higher FSB than my board can handle so would my board run the cpu at 266 FSB and if so how much of a performance hit would I take.

 

[smitbret]

If I remember, the multiplier was pretty standard, max of 13. Take that times FSB of 133Mhz and you get 1729Mhz, or an XP 2100+. You could push it higher, though. I think I was running my T-bird 1.4Ghz at 148Mhz with some Crucial PC2100. That would give you about an XP 2400+. I had one of these boards about a year and a half ago. Loved it, absolutely loved it. Good overclocker. You might get better results with a newer CPU and some PC2700 or PC3200. You'll be taking a chance at corrupting your PCI and AGP data streams, though since this motherboard doesn't have any bus dividers. At worst, though, you'll have a better CPU that you can run underclocked until you get a newer board. A Barton 2500+ will probably work really well for you.
-Brett

 

[neveroldmilk]

U`d better ask the Engineer of the Shuttle,and you will get a satisfied reply about it.

 

[o1die]

Last time I checked, the max cpu was the palimino xp2100. No bios upgrades that I found would permit using the thoroughbred.

 

[ChipDeath]

I thought the only real difference (as far as the mobo is concerned) between the pally and t-breds was the process shrink from .18 to .13? If that's the case, then surely it will support t-breds if it supports palomino?

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The end is nigh.. (For this post at least)

 

[ChipDeath]

Actually, I'm talking CR@P. if the board can't support the lower voltages for the t-breds, it won't work. my bad. please ignore me in future :redface:

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The end is nigh.. (For this post at least)

 

[phsstpok]

Tbred B XP2100+ will work fine as long as you use BIOS EI or higher.

It's a good choice because it's cheap and it has the 8x multiplier bit enabled. The high multiplier bit is useful on legacy mobos which have a lower limit for bus speeds. The higher multipliers help get maximum overclocking on such boards.

Try the Shuttle forum at <A HREF="http://www.amdb.com" target="_new">www.amdmb.com</A>. You'll find lots of people using Tbreds and Bartons on various revisions of your board.

You'll find <A HREF="http://www.amdforums.com/showthread.php?s=6274e73642291c412789fad9a9e498bf&threadid=174085&highlight=ak31+tbred" target="_new">this thread</A> particularly helpful as it has lots of testimonials and how-to descriptions.

You'll find this remap table helpful as well. Older motherboards can't manipulate the 8x multiplier bit but the remaps let you access the higher multipliers all the same. Remember the 8x multiplier bit has to be enabled to access the remapped multipliers.

<b>Remappings</b>

<pre>Bios Remap
5x ----> 13x (doesn't work on some mobos)
5.5 ----> 13.5x (same)
6 ----> 14x (same)
6.5 ----> 21x (same)
7 ----> 15x
7.5 ----> 22.5x
8 ----> 16x
8.5 ----> 16.5x
9 ----> 17x
9.5 ----> 18x
10 ----> 23x
10.5 ----> 24x
11 ----> (reserved)
11.5 ----> 19x
12 ----> (reserved)
12.5 ----> 20x</pre><p>
<b>[Edited for clarity]</b>


<b>56K, slow and steady does not win the race on internet!</b>

 

[phsstpok]

The motherboards had to support the old Durons. The 600, 650, and 700 ran the same 1.5 V core voltage that we are seeing now with Tbred XP1700+ and XP1800+.

<b>56K, slow and steady does not win the race on internet!</b>

 

[ChipDeath]

Didn't realise the older Durons had such a low core voltage... Thanks for the info!

I was thinking of stuff like my Asus A7V333, which doesn't go below 1.65V or so. (and fluctuates between ~1.65 and ~1.8V whatever you set it to anyway... P.O.S.)

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The end is nigh.. (For this post at least)

 

[phsstpok]

It's usually the BIOS that set the lower limit for VCore. For example on your old mobo you probably had a 1.75 proc installed. Your BIOS let you lower VCore to 1.65 V, a -0.1 V increment. Stick a different processor in the board like one of those old Durons and you would see the default at 1.5 V and you could lower it to 1.4 V, that same -0.1 V increment.

My old Abit KT7 mobo has adjustments to down 1.1 V. Of course, I never had a processor that could test this.

<b>56K, slow and steady does not win the race on internet!</b>

 

[ChipDeath]

sadly no, after flashing to the latest BIOS, I shoved a t-bred 'b' XP1700+ in there, and it was still happily trying to stick ~1.75V thru it. :frown: so it would work for 3 minutes and then suffer heatstroke.

Yeah - I do actually have an old KT7 mobo too, and I noticed that the BIOS there did go all the way down to ~1.1V or so (can't remember exactly).. Maybe Asus just released crap BIOSes for that mobo?

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The end is nigh.. (For this post at least)