Something's broken, and I think it's the CPU

InternetDuder

Member
Jun 12, 2005
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I promised a long story and here it is.

I just bought a new computer:
mobo: DFI Lanparty UT nf-4 Ultra-D
cpu: AMD 64 Venice 3200+
ram: 2x1gb OCZ DDR 400
gpu: Leadtek 6800GT
psu: Antec 450watt something

that should be all the important specs

Anywho, I started up the HL2 (everything at stock speeds), and it ran like a dream, for about 40 minutes, until it started hanging. Freezes for a few seconds every 5 minutes, then 10 seconds every 3 minutes, until it gets too bad to play, or it bluescreens. I thought 'ok, sure, overheating, no problem," and promptly pointed a table fan at my open case, while cackling wildly.

This solved my problem.

But, now I'm looking for a more permanent solution. I origionally blamed the video card for overheating, and looked at the temp. I was surprised by the idle temp of >50'C, and thought this was a big problem, possibly bad contact. But then I found that these temperatures are rather normal for this card. I did some testing.

With the FSB overclocked by 5mhz, the game reached the 'overheating' syndromes much faster. With the fan pointing at the case, it still experienced some of the syndromes, although much rarer.

All the information so far seems to be pointing towards overheating.

So i tested some more, and brought the clock back down to stock. From this point on, all speeds are stock.

I redid the contact to the chipset to the HSF. That did nothing. I started putting blame on the fact that the video card is directly over the chipset. In lieu of a picture, here is some crappy ascii

----o
(hyphens is the card, O is the chipset's HSF)
The end of the card does hover over the chipset, but the card has very little bulk at that point.

The blame on the chipset all but faded away the other night when I ran prime95 (with the fan off), and recived an error after a couple hours. This still MIGHT be the chipset, but a friend assured me that it is almost definetly the CPU or the ram, as the chipset does not handle the ram on the 64 bit motherboards.

I then ran memtest86, which ran for 10 hours with no errors, and is still running while I am at work.

After all this, I think I have it narrowed down to the CPU overheating. The temperature readout is not high, nor does the heatsink feel hot. I am not sure where the temp sensor on the 64 bit processors are, as there is no spot on the bottom without pins. I hope it is just bad contat between CPU and HSF.

Condensed version:
-HL2 @ stock w/o table fan = crash
-HL2 @ OC w/o table fan = faster crash
-HL2 @ stock w/ table fan = no crash
-HL2 @ OC w/ table fan = small stutter
-Prime95 @ stock w/o table fan = fail
-Memtest86 @ stock w/o table fan = stable

So, It seems the next thing to do woudl be one of the following
A) redo contact between CPU and HSF and pray
B) run prime95 with table fan
C) RMA everything and become a hermit
D) Run that wacky video test rthdribl

I will try to avoid C as my thatching skills are lacking. Thanks for any advice.
 

Vegitto

Diamond Member
May 3, 2005
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Get a new cooler, and try that one. If that doesn't work, just RMA your CPU and/or maybe your cooler (was it a stock one?).
 

cbehnken

Golden Member
Aug 23, 2004
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Well, what's your CPU temp? I wouldn't be replacing anything until you know that.
 

InternetDuder

Member
Jun 12, 2005
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Case cooling isn't the issue right now. The case door is open for most of these tests, and even if I Could get a cooling system that offers the same power of a large table fan on the highest setting, that would say that my system cannot handle a 5mhz FSB increase.
 

imported_2x

Member
Jan 20, 2005
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The heatsink on the CPU should feel at least a little hot if it is doing it's job. You stated that the heatsink did not feel hot and that tells me that the heatsink, for whatever reason, is not transfering heat properly. I'd take off the CPU heatsink, thouroughly clean the cpu surface and then use a different cooler. Maybe this one http://www.newegg.com/Product/Product.asp?Item=N82E16835106038 , or another cooler that is all copper, not aluminum or aluminum/copper.
 

Zebo

Elite Member
Jul 29, 2001
39,398
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Re-seat HSF with new thermal compound. What thermal compund you using, none? No way it should ever get above 45C with that HSF.

What case? Could also be PSU. Antecs kinda suck in thier value line. Well they kinda suck accross board but thier's lots of fans so I did'nt say that.
 

Zebo

Elite Member
Jul 29, 2001
39,398
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Again re-seat HSF.. if that fails my money is on PSU.. Split rails suck, expecially that low, 12A is nothing.
 

InternetDuder

Member
Jun 12, 2005
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I have a multimeter in case I need to test the PSU. Is there an instruction anywhere for how I should do it? I've never opened up a PSU :(
 

TGS

Golden Member
May 3, 2005
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link

If you are looking for just a the amps on the lines, you shouldn't have to open the casing up.
 

Zebo

Elite Member
Jul 29, 2001
39,398
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Yeah you can test it.

Start up something like game or prime and meaure rails with multimeter like I show you here.

Text
 

rise

Diamond Member
Dec 13, 2004
9,116
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you've got all 4 power connectors in too?

also may want to take it off "auto" volts if you are using those.
 

Operandi

Diamond Member
Oct 9, 1999
5,508
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The CPU temp on the A64 is read from the die, you should be able to trust it assuming the BIOS and software is reading it correctly. Check for a BIOS update and try a different program to check the temp, I use Speedfan. If 40c is correct that's ice cold for a load temp, you must have a fairly powerful fan on the Swiftech.

I would run Prime95 again and see what tests it errors on. If it's the CPU intensive test it's prolly the motherboard, PSU, possibly the CPU but it doesn?t seem likely. If it crashes on the RAM test it's most likely bad RAM.
 

rise

Diamond Member
Dec 13, 2004
9,116
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nice call Operandi.

i forgot the bios issues. alot of the dfi nf4 are still shipping with the 1.25 bis. you'll want 3.10 or later for venice. the 5.10's are really nice.
 

InternetDuder

Member
Jun 12, 2005
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Thanks, lots of helpful advice.

After reading ArcticSilver's insructions on how to apply thermal paste, I can see I did nearly everything incorrectly... including taking the heatsink off and putting it back on without a reapplication. In a couple hours I am going to reapply. Wish me luck!
 

Zebo

Elite Member
Jul 29, 2001
39,398
19
81
LOL Operandi - I just asume everyone gets latest bios and loads up optimized defaults and runs memtesting stuff like that..:p

hey you take quantum? "operand models" your name?
 

InternetDuder

Member
Jun 12, 2005
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dang... i'm having the same problem after a full reapplication, although it seems like it took longer for the stutter to come (playing game). The heatsink isn't even hot! Monitor view records 37'
 

InternetDuder

Member
Jun 12, 2005
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At the advice of a friend, I am now using the stock heatsink at stock speed. No explosions yet, I'll be monitoring it with both nview, and this thermo-gun.

Edit: Stock HSF has same problem. Multimeter on rails shows very decently close voltages, I'm guessing 4.95, and 11.95. I am not sure how to test the motherboard voltages while the unit is on. With teh stock HSF on, the side of the heatsink measures about 38`C, and the NView says 42. To contrast, with the Swifttech on, NV was reading about 37' and the heatsink measured about 29. Is that big of a difference expected? And since this all seems not ot change anything, does my problem seem to lie elsewhere?

Memtest86 ran for 20 hours with zero errors.