I think I almost killed it...

SammyBoy

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Mar 16, 2001
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I found out that my processor no longer runs efficiently at oc'd speeds, or even stock speed. Seems that in 3DMark2001, the vertex shader score drops drastically as the CPU score increases. At 1.3GHz, the score is 15 FPS, 1.26GHz is 26 FPS, 1.2GHz (stock) is ~50 FPS, and at 1.13GHz the score is a robust 80 FPS. I used to have the CPU up at 1.4GHz, but after a while, it would no longer go 12 hours in Prime95 (or 12 minutes), so I dropped it to 1.3GHz, where it was fine. Then my Ti4400 showed up, giving me dismal vertex scores, though everything else was fine. Thought it was my motherboard, but instead, on a whim, I brought the CPU to stock speeds, and the vertex score shot up. So, I think that running at or more than 60C for the last 7 months has damaged it. Ah well, it was time to upgrade anyway. I just wish that my motherboard actually supported more than the pre-AXPs.

Speaking of which, I need suggestions for a new motherboard, preferably a non-VIA-based one. I liked the IWill XP333 I put into a friend's computer, but if possible, I want something... better. Too many VIA 'boards out there, and since I've had bad experiences with multiple VIA boards, I'll stick to the ALis' and SiSs' of the world.

One more thing that I just thought about. Given the fact that the vertex score is so greatly affected by the CPU (or at least the ability of it to process things correctly), is it possible that the NV30 and R900 are incorporating some kind of T&L-like hardware onto their boards to process DX8 (and maybe DX9) on-board instead of waiting for the CPU to handle it and send it over on the AGP bus? This comes up as I've heard reports of the NV30 having a seperate processor on board to handle T&L, and being able to process DX8 commands on the board itself could account for the supposed 50-100% speed increase Nvidia documents are reporting. I ask, cause both my experience and CPU scaling by Anandtech seems to show that DX8 titles on DX8 cards scale extraordinarily well with faster CPUs (like Jedi Knight 2 and Comanche 4, and maybe even UT 2).

-SammyBoy
 

lhgpoobaa

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Dec 31, 2007
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yep... i found that
my 1200C would work at 1400 ok, but when i tried for 1500 with 1.95+ volts on my new mobo everything suddenly went flakey.

in the end my cpu wouldnt run prime95 even underclocked. burnt out. hehehe
and this is with a monster MCX-462, so the temps never got above about 50C, and still it died

<font color=blue>All religions are true, for a given value of 'true' - Terry Pratchett.</font color=blue>
 

rcj187

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same with my 1.2 tbird, it was fine at 1.4 running at about 50deg but it died as soon as i tried to boot at 1.466. never even got to post. even setting back to stock speeds didnt work.

I'm out of my mind, but feel free to leave a message.
 

lhgpoobaa

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Dec 31, 2007
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nods.
wierd that
and mine displayed some strange behavior.
ive got the 8k3a+, the kt333 board with the 1/5 divider and vcore up to 2.2v

at 10.5x133=1400 it was fine & happy
at 11x133=1466 it woulnt boot to windows
at 9x166=1500 it would, and ran stable until something like divx encoding was attempted.

why would 1500mhz work but not 1466?
wierd.

on a xp1800+ now. stable at stock speeds all the way down to 1.625v (can do 1.600v but stability may be a bit iffy)


<font color=blue>All religions are true, for a given value of 'true' - Terry Pratchett.</font color=blue>
 

rcj187

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i never tried mine at 166fsb as i only had a GA 7DXR based on the the amd 760 chipset. but i also never tried any voltage increase either. i had no need to it was 100% stable at 1.4. kinda strange that it could handle 1.4 at normal voltage but die immediately i try and boot at 1.466

I'm out of my mind, but feel free to leave a message.
 

SammyBoy

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That Epox board... is it doing well? I've heard many good things about it. Like I said, I'll need a new board when I replace this processor, since it's pointless to get a 1.4GHz T-bird.

I just need a rock-solid system that is good for light overclocking and fits a Ti4400.

-SammyBoy
 

lhgpoobaa

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Dec 31, 2007
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yep
the proverbial straw that broke the camels back.

just out of intrest... does the cpu work at all if you

A. enable ECC on the L2 cache
B. disable the L2
C. disable the L1

do there things and u may find out which part is fried (academic i know)

<font color=blue>All religions are true, for a given value of 'true' - Terry Pratchett.</font color=blue>
 

rcj187

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lol
mine died over a year ago! after spending a week or so trying various different settings with no luck it got stomped on and thrown on the scrapheap :) problem is i couldnt afford a replacement at the time so i had to get a duron 850 and oc to 1GHz.

I'm out of my mind, but feel free to leave a message.