Athlon 64 X2 4800 Processor temperature

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bkuhl

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Jun 14, 2004
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I just bought a system with an Athlon 64 X2 4800 from Velocity Micro. So far I have been very happy and the system has been stable, but one thing has me concerned. When I first received the machine I installed the system monitoring tools and found the processor temperature to go up to 74'c when using Distributed.net to stress the cores.
When I called VM they asked if the system was unstable or rebooting at all, to which I replied no. They stated that the X2 4800 is OK up to 80'c. Everything I have been able to find on the net doesn't jive with this.
When VM wasn't willing to do anything I decide I had to. I started by upping the case fans from 2x20CFM to 2x24-41 (they scale as temps increase). That dropped me from 74 to 67'c.
That still didn't give me the warm and fuzzies, so next I attempted to install a side blowhole. I noticed that with the side door off my temps would drop considerably. This didn't go so well (anyone have tips for cutting into plexiglass?), but the fan is mounted and moving air into the case. This took me from 67 to 61'c.
Still not overwhelmingly pleased, I decided to try and replace the Zalman 7000B Aluminum with the 7000B Copper. I figured this would be easy as they had the same mounting bracket. This has taken me from 61'c to 57'c. I have tried remounting the HSF twice to be certain I got good contact, with no change.

A 74'c to 57'c is a nice drop, but I still feel I am close to the max temp. At this point I have tried all the logical solutions and I am beginning to believe I just have a hotter running core.
Does anyone have any experience with what I should be expecting or am I just asking for too much?

Any help appreciated....

-BKuhl
 
Jump into BIOS and see what the vcore is set at. Should be at or below 1.4v (I think it should be 1.35v). If it's higher, force it to 1.35; this might make a difference.

Check out the charts.
 
Still seems a bit warm. I used to use the Zalman then switched over to the XP-90 with a Thermal Take CAT-90 fan on my 3800 @ 2.82 and dropped my temps to 41c. I also increased my case air flow, a much over looked option. I use a pair of 120mm fans, one in front and one in the rear.

As for fan holes, well nothing beats a hole saw. Even in Plexi with careful use of a hole saw powered with a drill or drill press you will get nice results, just GO VERY SLOW in plexi. You want to cut, not melt the plastic. A good hold saw will also work in your metal case as well and keeps things very neat.

I admit, the hole saw is not as cheap as a sabre saw, but you will use it often and it does a much neater job, and a way better job then the trusty old Dremel ;)
 
I used the dot method, but didnt like the results with that. I also tried the method some use where the use an old CC to spread it, that produced similar results. This time I attempted a small X in the center of the processor (WTF, nothing else was working) and basically see the same result.

-BKuhl
 
Those are some pretty high temps for stock voltage and speeds for a 4800+. The X2's are rated to 65C so if load temp goes past 60C then i would start looking for ways to lower the temp some.
 
bkuhl said:
I used the dot method, but didnt like the results with that. I also tried the method some use where the use an old CC to spread it, that produced similar results. This time I attempted a small X in the center of the processor (WTF, nothing else was working) and basically see the same result.

-BKuhl
Click to expand...

The best method for AS5 is a small drop in the center. You should follow the directions on the Arctic Silver website for applying. AS5 takes several days to start working to its full potential so you wont notice a difference immediately. Thermal paste alone also wont make that large of a difference in temps.
 
DejaWiz, according to the Xbitlabs link you posted I am pretty close to their tested speeds. They showed 58'c in their testing, mine is hovering around 57. I'm hoping with the fresh AS5 application I may drop a degree or 2 as it settles...

-BKuhl
 
My VCore is pretty steady at 1.36. I tried manually setting it to 1.35 and it still showed as 1.36 in Windows through SpeedFan. I also tried the 1.3375 (?) but that gave me odd readings when in Windows, showed a VCore of 1.8.
I put it back to Auto settings and re-enabled Cool 'N' Quiet. I set it disabled so as not to override the manual setting.

-BKuhl
 
hmm sorry if i'm thread jacking here, but i'm using a 4800+ too. Just installed it yesterday and my temps have been VERY different from yours. The bios shows its at 31-32C and mbm shows it as 30-32C idle and 37-38C during prime95. I thought I was just lucky until you guys said the default Vcore was 1.35. Mine was set to 1.26 by default. Am I concerned over nothing, or is the low voltage stunting my performance? thanks for any help
 
voltage has nothing to do with performance... only stability and temps. if it runs at that voltage by default, then it's probably around the stock voltage, thus should be stable. lower is always better unless it makes the computer unstable
 
Use CPU-Z to check what speed your running. Also, with Prime95 you need to run 2 instances to stress both cores. Start one and go in and set the processor affinity to 0 and another and set it to 1. This will max both cores. I would think you will see rise in temp, your probably only running 50% processor utilitization.
If necessary start a new thread...

Now, back to me.

My room temp is also close to 25.5c (77-78f). This may be having an impact also.

-BKuhl
 
bkuhl said:
My room temp is also close to 25.5c (77-78f). This may be having an impact also.

-BKuhl
Click to expand...
For air cooling, that will have an impact on system temps. ;)
 
OK, poor choice of words. I know it would have an impact. I guess what I'm really trying to determine is how much of an impact. If I drop my room temperature 2-3 degrees, I don't expect my case\processor temps to reflect a 1:1 drop.
 
run cool and quiet features in bios ....

also , some mobo sensers are not accurate while reading temps ... what mobo do you have ?

74 is too high ......

i think the upper 50s under load is where it should be ....
 
I have the same problem with my 2200 xp, the temp on it would go to about 50c (idle) which I was told isnt to bad. Now, this is with two case fans+power suply+hsf (nothing special)= Noise
I managed to get the temp down to 47c with a side blow hole (btw my room temp is about 22c) I know this temp isnt to bad, but my room would heat up to much so i decided to just clock it to 1.3ghz (from 1.8ghz) at a grand idle temp of 41c

Personally i think it has to do with the the motherboard.
 
Well, I have the Asus A8N-SLI Deluxe. It could be my sensors are off a little. I was able to run the processor at 74c for several hours stable. This may indicate that it is inflating temps a little.
The room is A\C'ed. I actually added a return to that room to pull out extra heat, a second duct to bring in cool air, and booster fans in each duct to push more air through. I have 6 running computers in that room currently. I also have 2 laptops which I run occasionally, a TV, and three heat generating CRT monitors...

-BKuhl
 
if the room has an ac, no way will the processor run at 74 .. your sensor is inflating the temps ... but off course there must be a way to test that ....

i have a quick question .... have you cleared your cmos after installing the processor ?
 
I'm thinking of getting on of those laser temperature sensors. I don't even kow what they are called, but I thought it might be useful for that exact reason.
Also, I thought of the BIOS issue too. I just downloaded the 1013-003 (?) BIOS and applied it a few days ago. Unfortunately temps were reported exactly the same...

-BKuhl
 
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