running xp pro x64 edition on o/c rig

[karlreading]

running my computer in the overclock thats stated in my sig on windows xp 32bit is pukka, but it well unstable when u play a game in 64bit mode ( running xp64bit ), the only way to play a game in that is to return the system to stock settings.
has anyone else noticed there o/c system lose its stability when running x-64 edition windows?
and does anybody have any thaughts on this, such as the extra registers not bieng used in 32bit windows means that you can pull the overclock of in 32 bit??
id be intrested to hear your thaughts.
many thanks
karlos

 

[kamranziadar]

Ok first of all you tell me how you gotupto 2.4GHZ.

 

[karlreading]

ok basically:
1: be lucky and by a late hammer processor by which time AMD have got good yields that clock well
2: overclock the m,ultiplier to 10*240
3: juice the bitch to 1.7v core
4: go to memory setting and ( on this board ) move max memory clock from 200(400) to 166(333) which changes the devider so at 20*240 multiplier you have memory speed of ddr 400. as memory is connected str8 to processor this dont have the effects of running through the fsb asyncronusly, and yes whilst we all want to run fast memory speeds, it still gives me near a perfect 3700+, as that is ddr400 anyway!!!

but the question still remains, why is it not stable in 64 bit yet perfecto in 32bit??
karlos

 

[Adn4n]

It might have something to do with XP 64 optimization. It is not a stable OS yet, plus your drivers are not made to play 64 bit games.

 

[karlreading]

Originally posted by: Adn4n
It might have something to do with XP 64 optimization. It is not a stable OS yet, plus your drivers are not made to play 64 bit games.

good point but as i said in the first post, when i put the cpu back to stock it plays the games fine on my 64 bit installation.

 

[MDE]

It's a beta OS with beta drivers. Weirder things have happened.

 

[superHARD]

Originally posted by: MDE
It's a beta OS with beta drivers. Weirder things have happened.

True True...do you remember the beta win 2k?...LOL

 

[iversonyin]

the 64-bit window is sitll in BETA version. what do you expect?

i think Window ME is better then 64-bit BETA xp.lmao

should wait another 2-3 years until a real 64-bit OS come out. til then you probably need a Athlon128 or P6-64

 

[Dman877]

Of course there are parts of the cpu being used in a 64 bit environment that are not used in 32 bit operation. It'll prolly be like P4's with HT, most P4's can oc higher with HT disabeled cuz it adds more heat. Since there's more transistors popping when you're in 64 bit op, there's prolly more heat.

 

[karlreading]

Originally posted by: iversonyin
the 64-bit window is sitll in BETA version. what do you expect?

i think Window ME is better then 64-bit BETA xp.lmao

should wait another 2-3 years until a real 64-bit OS come out. til then you probably need a Athlon128 or P6-64

really. never had gussed that its a beta o/s. ( thats me bieng sarcastic BTW, its a britsh thing )
Of course i know its a beta o/s, wish people would understand that. i was just commenting how a overclock that works on 32 bit windows is unstable on 64 bit windows. the fact the the stability goes back to rock solid when u remove the overclock in 64 bit windows makes me think that its not the o/s bieng beta causing the problem, but rather that parts of the cpu that arnt in use in 32 bit mode test the cpu and show up its instabilitys at overclocked speed.

well done Dman877, he actually made a good contribution to this post, and got what i was on about

oh, and on a final note, xp-64bit beta is, IMHO totaly stable already, i beleve the o/s itself could go gold tommorow. fact is it suffers from driver support ( lack of ) and also a lack of driver programming knowledge to squeeze the best from it. Oh, and a reluctent m$ and intel, but there a diffrent story.......
karlos

oh, and finally, if someone ouyt there with a o/c amd64 system has experianced this as well, id love to know.
karlos

 

[sonoran]

i was just commenting how a overclock that works on 32 bit windows is unstable on 64 bit windows. the fact the the stability goes back to rock solid when u remove the overclock in 64 bit windows makes me think that its not the o/s bieng beta causing the problem, but rather that parts of the cpu that arnt in use in 32 bit mode test the cpu and show up its instabilitys at overclocked speed

It's entirely possible (even probable) that there's 64 bit circuitry that's more finicky on timings than the 32 bit circuitry. After all, the 32 bit circuits have been tweak for years to get the highest speeds possible.

 

[ajayknair]

Hey Karl,

I noticed this too.. So we are on the same boat..
I am 240x10 stable at 1:1 (most of the time at least). with XP32 bit.

But when I log into the XP bit XP boot.. I get the "blue screen of death" pretty regularly.
P95 fails in the first minute!!

My take no this is :
1. The memory has extra stress put on it with 64 bit transfers? I dunno if I am way off on this assumption.

2. The CPU definnitely stresses out more with the Extra registers in there being used when in 64 bit mode.

Let us know if you learn something else about this behavior

AJ

 

[ihiktacos]

Well, after wondering why CS:S kept on crashing I turned down my OC and low and behold, no crashes. It is stable at 2.6 GHz in Win2K, but in Win x64 in order to get rid of the crashes I have set it to 2.5 GHz (so, still overclocked, just less).

 

[Ricericebaby]

Hey Karl,

I think my processor can hit 2.4ghz too, (it's a late claw) I was wondering if you had to set HTT to 3 times?

Is there a way for me to get 64bit winXP? I'd love give that os a try.

 

[ihiktacos]

The 64 bit version is free to download at:

https://microsoft.order-9.com/...5Fid=winxp64&id=dl

But check before whether all your hardware works, and install it such that it dual boots

 

[imported_SLIM]

This thread begs the question Karl how stable is your win32 overclock (prime95 x 24hrs and super pi etc) and at what temps? What temps are you having in windows 64bit? What power supply are using and what cooling?

 

[karlreading]

overclock was stable on prime till i got bored after 8 hours, at which point i defined it as stable. however the other day i unseated the hsf to put the thermal probe from my coolermaster musketeer inbetween the heatspreader and the hsf. i feel premium contact with the HSF has been lost cause after a 45 minuet mcrae session she just rebooted. this was after the thermal prob thing though, so again i cant rule out cooling. for now im back at stock (2ghz ) as i want to get far in mcrae and rebooting aint my thing. but im pretty sure i need to re do me arctic silver and re seat me hsf agin. Incidently at the time it rebooted the musketeers probe recconed it was 50 deg c inbetween the chip and the hsf.

core voltage was 1.7 and memory was at 400, so whatever ratio that is ( on my board the option ismax memory overclock 166 so when multi at 240 works out at 200/400ddr )

 

[ihiktacos]

Alright. I did some more investigation on this issue. I started up CPU-Z to monitor the system To my surprise something really odd happens under Win x64. When the CPU is under load, the HTT actually increases.. from the normal 220 it would jump up to 230 and sometimes even 240 Mhz depending on the application. Normally I would say that this is just something being misread by CPU-Z, was it not for the weird crashes I am experiencing in Win x64 and would certainly explain the crashes. So, whether this is a bug in CPU-Z, Win x64 or perhaps even intentional I do not know :/ I just clocked a bit lower to be safe.