OC'd TBird/1.82 Volts = 52C...how about yours?

[MichaelD]

I stumbled around trying to come up w/a subject line that wasn't 30 words long...hopefully someone's reading this.

My 1Gig TBird is running at 1155 right now (11 x 105) at 1.82 volts. (The voltage step that's one click lower than the max of 1.85).

Under heavy load, like playing UT, I've hit 52C. Interestingly enough, when running Prime95 for 12 hours the temp never goes above 45C. Anyway, immediately after closing down UT (or other CPU intensive application), idle temp drops to a nice 32-33C. While surfing the net, or word processing, CPU temp is around 40-43C.

I'm curious if my "high" temps are due to the voltage being upped so high. I've been thinking about dropping back down to a 10.5 multiplier, because my CPU will run at 10.5 at the stock 1.725 voltage. I guess this is kind of an opinion poll, but I didn't want to start a "proper poll". Thanks in advance for your replies/opinions.

 

[jaybert]

maybe try the OC forum..prolly more help

 

[BoRRoN]

My Tbird 800 is running at 1007 (9.5 x 106).
Surfing Temp is around 43º.
Idle 39º.
Heavy Load (seti@home, ut, q3, sandra 2001 burn-in, rc5): 46º
Using a FOP32-1, modded with a 80 mm ys-tech fan.
Voltage: 1.92 volt
Asus A7V bios 1006

 

[Mikewarrior2]

What motherboard/bios are you using?

The high change from idle to full load temps(UT is higher probably due to increased case temp from video card heat) indicates that the heatsink may or may not be isntalled correctly. What heatsink are you using?


Mike

 

[MichaelD]

Hey Mike, good morning,

Abit KT7. FOP-32-1. Arctic Silver II. (I wouldn't even try to oclock with my old HSF (nonCoolerMaster...dinky little fan) I know the HSF is installed right...I made sure of that. When idling at desktop (only VIA hardware monitor open) it'll idle at 31-32C.

When I had first overclocked this CPU (I'm new to the OC game) I was at 10.5 mult with stock voltage. CPU never saw 50C.

Ever since raising the voltage to 1.82, it runs hot under load. If I try any voltage lower than 1.82, w/11 mult, the system boots to desktop, then locks.

My system (case) temp is never more than 25C, which is only about 10F above room temp. I've done some minor case mods. Removed the "perforated" grills on the case chassis (love that Dremel) and replaced with regular wire grills, on both front and rear fans.

 

[MichaelD]

One other thing...I forgot. I'm using the bios that came with the board. I believe it is the WW, which isn't the latest one....do you think that could be it?

 

[Mikewarrior2]

well, does the case temp go up during gameplay(it should)... if you're not using mbm, you can use that to keep a high/low temp log, so you can see the peak mb/system temp that you hit when playing games. Because if your case temp goes up 5C, that explains why the UT temp is warmer than the Prime95 temps.


Mike

 

[MCS]

In thoery the case temp will go up during games because your graphics card/sound cards are being stressed (thus producing heat) whereas under Prime95 they are not (just the CPU/memory etc).

I have also found that even with no change in case temp Prime95 does not push my 1.2 to its highest temperatures. I usually run it along side something else (Sandra 2001 burn-in wizard, for example).

Just to let you know, I have the same BIOS revision as you (WW) but have tried the newer ones and returned to this one for various reasons - the temps did not change.

I am not currently o/c my TBird 1.2, voltage is 1.75V, idle temp right now is about 31C, with a case temp of 24C and a room temp of 25C (somehow!). Under stress I hit about 45-47C.

 

[MichaelD]

Thanks MW & MCS! When I get home, I'm going to reduce my CPU clock to 10.5 and lower the CPU voltage to stock. I'll leave my FSB at 105. There really isn't a difference between 1555 MHz and 1102 MHz anyway. Except bragging rights of course!

When I'm gaming, my case temp does go up by around 3-4C. It's just that CPU getting up to 52-53C makes me nervous. I know that it's well within the Athlon's operating range (90C!!) but the whole reason I went from the old HSF to the FOP 32 was to lower CPU temps. But then once I got them lower, I said "hey, I can overclock now!" and got bitten by The [b}Free Megahertz Bug[/b] and you know the rest.

MCS, before I had to raise the CPU voltage to get stable at 11x, my CPU was ususally in the same 46C neighborhood as yours...so, back to 10.5 I go. At least I'm still in the Gigahertz Club! Thanks guys...sniffle....sniffle....you can even have my Bud Light!

EDIT EDIT BIG TIME EDIT I MEANT THERE ISN'T A DIFF BETWEEN 1155 AND 1102...CERTAINLY THERE IS ONE HECKUVA DIFF BETWEEN 1555 AND 1102!

 

[MichaelD]

Just an update...for the good people that helped me out. ...and another question, of course!

Hi there. I reduced my multiplier to 10.5, reduced the voltage to 1.775 and raised the FSB to 107. Now running at 1123 MHz. Most importantly, temps have dropped quite a bit. Now idling at 31-32C and running 47-48 under stress. Dropped about 5C just by lowering the voltage. Darn Athlons run hot!

I've noticed that lately, my case temps are higher than ususal. It's gotta be the videocard. Can they "run hotter over time" due to increased bus speed? My AGP bus speed is 74MHz...that's not deadly to a GF2 GTS is it? And here I was thinking about overclocking my videocard as well.....oh well.

 

[smp]

Tbird 900@1060 59 C under load.. stable.. I'm not worried.. stock heatsink, blowholes, mobo temp 25 C..



mike is this okay?

 

[sd]

my info

 

[Mikewarrior2]

SMP,

Depends: Are you using an A7V class board and using PcProbe as the reading software? If so, your temps aren't super, but htey aren't bad either for an a7v series board.


MichaelD,

It may, but that depends on your case-airflow design.



Mike

 

[MichaelD]

Mornin' Mike W,

I've made some mods to my case. Nothing drastic by any means, especially when compared to the watercooled/peltier crowd. I have, what I think, is good airflow. Aside from the CPU HSF/Via Chipset fan/vidcard fan, I have two 80mm ballbearing fans that turn at about 2700 or so RPM.

One mounted on front panel at bottom drawing in, other mounted on rear panel (right next to the CPU) blowing out. I've dremeled-out the "cheese grater" vents that are integral to the case chassis and replaced them w/regular wire grills. My IDE cables aren't rounded, but they are "folded and wire tied" out of the way.

This may sound stupid, but it's the only way I can explain it. I imagined that I was "air" coming thru the front fan, looking for a clear line-of-sight to the rear exit fan. I folded and wire tied all my IDE cables/fan power lines out of that line-of-sight. So, as best I can tell the air flows thru the front fan, over my vidcard, over the CPU and then out the rear fan. I did notice my case temps drop by about 2C after these case mods....but then I discovered overclocking and my life's never been the same since. Free Megahertz is addictive, you know.

I appreciate your time. Thanks bud.

 

[MCS]

Try as run as low voltage as you can. When I say low I mean below default - there has been quite a lot of reports recently of people LOWERING their voltage to say 1.65, 1.70 and gaining stability. Not to mention less heat! My TBird does not like any voltage higher than 1.80V, any higher and it locks up just after the desktop loads, regardless of clock speed.

Yes your Geforce 2 can potentially raise your case temp, but in my case its only 1-2C, that's all. 74Mhz AGP is fine, I have had mine running all the way up to 100Mhz before (my old Geforce 1 handled these speeds too).

Case airflow is really a balancing act. Try to have as much cool air being drawn in as you have hot air being pulled out, for a smooth flow of air. If you are reading temps of no more than 25C then I would say you're doing pretty good. Look out for "hot spots" though (eg around the PSU). Don't forget your temp sensor is very local to a particular area of the case where it is positioned.

 

[DARRIN]

Mine gets up to 58C under load.

 

[MichaelD]

MCS,

Your reply made me happy, because my case temp at idle is 21-22C and under heavy load (after gaming for about an hour or so) it's 24-25C!

I never thought of lowering the CPU voltage before. Lemme bounce this off you and see what you think.

I have a 1Gig Tbird. The system will boot stable, run benchmarks fine at 10.5 at stock voltage (1.750volts) with the stock 100 FSB speed. But if I then raise the FSB by 2-3MHz, the system will lock at the desktop at least 50% of the time unless I raise the CPU voltage to 1.775. Small increase, I know, but it will lock up when it gets to the desktop if I don't raise the voltage a hair.

At 11x multiplier, the voltage needs to be raised to 1.82 even if the FSB is at stock 100. My system will not boot with a 12x multiplier even with FSB at 100 at max CPU voltage. I've been thinking about running a cord from the wall to my CPU socket.....KIDDING

What confuses me is that being this is true (the voltage thing needing to be raised) how would lowering it work? I do realize that I should just be quiet and try it to see if it works, but I'm at work (shhhh...don't tell anybody I'm surfing, not working!) and have to wait another few hours to play with my baby. It would be very cool if lowering it works. I'll give it a shot. Thanks for the advice.

 

[MCS]

No problem, I'm glad I could help

About the lowering voltage; try going here Overclockers.com and scan through the news articles (might be last months news you need to look at) they have lots of info on this including user comments.

Your case temps a very good.

 

[Verygreedy]

I am running very cool. 12x100=1200mhz 36degrees C .. active 42degrees C

my MB doesnt support OC of the FSB 100x2=max.. I think at least.