New cpu came today, troubles already?

Michael

Michael

Active Member
I got my new AMD 64 X2 3800+ today, and I like it.. it runs alot smoother than the old 3500+ 64, but the fan that came with the cpu has 4 pins, but it looks like it's fit to work with 3 pin slots.

I'm worried because the fan is only spinning at 840RPM.. Is this normal? The old fan (from the 64 3500+) spins at 1800RPM+.
 
does it apear to be spinning slow? i know 4pin fans will work fine on a 3pin connector but i dont see why it would be spinning slow
 
Yes it looks ike it's spinning slower than the previous fan was.

I tested it out to see if the fan was spinning slow by putting another fan (4 pin, the type powered by the PSU not the mobo connection) and putting it up near the cpu fan, blowing air into it resulted in the RPMs going up in the BIOS.. so I believe it's actually spinning at 840rpm as bios says.

The 4 pin plug the cpu fan came with is identical to the normal 3 pin plug you'd plug into the mobo, but it has an extra pin with a blue wire attatched to it :confused:
 
Will the old cpu fan work just as good as this new one? I know that's 3 pin, and it worked for the other cpu but will it cool this new cpu sufficiently ?
 
I tried and the new AMD fan is proprietary, screw holes are in real random places haha.. so I used the old cpu fan (from the 3500+) as an exhaust, and I put my new 92mm fan in as an intake and the system is sitting at 35c, about 39c under pressure.. it was at 47c idle before I put the new fans in.



I wonder, though.. the blue wire is for speed control.. so you would think the mobo (if it had the 4 pin plug) would send higher voltage through that line to gain higher RPM, less voltage for lower RPM, correct? So, if I jumped the blue wire (not hooked into anything) to the yellow wire (+12v) it should run at full speed?

Last resort, I'll buy a fan control.
 
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I actually found an artical on another forum I frequent, I'm going to try it and see how it works out :)

Link

EDIT: Jumping the fan actually made it run just over 500RPM, regardless of where it was jumped to =\
 
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As long as its keeping it cool. I would consider getting a new cooler anyway, i would suggest a zalman for ~$50
 
Zalman also has a copper colored model with a blue led lite fan for slightly more. I run that one on the 3500+ in use at the moment. Having noticed your mention of a slow fan on the stock AMD hsf I wouldn't advise trying to jerry rig something that won't last anyways. That was simply a defect that got out. The Zalman and adequate ventilation throughout the case as far as intake and exhaust will keep temps down.
 
I contacted AMD and they're sending me a new HSF, they claim it'll be a 3 pin instead of the 4 pin PWM.

If that doesn't work, it's stable below 43c under pressure until I can afford to pickup another HSF :)
 
Many serious gamers and certainly those who oc alot with automatically go for a large 3rd party cooler like the Zalman or Artic Cooling models. A good working stock hsf will get you by for years running a stock build. Here I already planned out a new build including the Zalman 9700 for an AM2 model board.

The 9500 is in use on the 939 model in use at the moment. The actual normal temp range would be in the low 40s upto the low 50s with a good load. Without any ocing you should get by until you decide which will work for you there.
 
I'm unable to OC at the moment, so the after-market cooling system wouldn't be of much use.

I'll invest in one when I order my new mobo :)
 
A good stock hsf will work if your case has good air flow seen. That is the more critical component. When seeing the Zalman 9500 on this system before buying the current case the Zalman saw no real difference over stock. The lack of cooler air saw the board temps climb over the cpu then.

With a stock hsf expect the temps to normally run warmer then one of the good coolers out however. But those should remain within the normal temp range unless a problem is seen. Both Intel and AMD have to provide an adequate hsf for their products or they simply wouldn't remain in business too long agreed? :P
 
I pulled apart my Socket 478 HSF, the fan is identical in size, except thickness, as the Socket AM2 X2 stock heat sink's fan, so I fitted it to the AM2 X2 stock heat sink using longer screws and it's currently running at just under 1800RPM, which is what the 3500+ HSF ran at.

I fitted the fan that came stock with the AM2 X2 HSF to the socket 478 heat sink and it runs at (about) 1300RPM on that board :confused:, it wouldn't go passed 890RPM on the AM2 board.

In any event, I've solved this issue with a little elbow grease.. this computer (AM2 X2 3800+) is now running at 29c, goes from 25-31c idle, cuts off at (so far) 39c under heavy load.

I don't have a huge case, it's the standard Acer T180 mid-case, 2x 5.25", 2x3.5", 4xHDD bays.

I also unhooked the intake fan, it sounded like a 747 trying to land on my desk! .. I also removed the exhaust fan, so now I've only got the cpu fan going, and it seems like it's enough.. it keeps my dual core nice and cool :D

Anyways, thanks for the help and I'll end up getting a better cooling solution later on, when I upgrade the cpu again.. I just wish AMD didn't stick a 4 pin PWM fan on the HSF combo.

I should also note that I don't have an aftermarket video card or a whole lot that would heat the case up, and my cpu is a 65w version of the 3800+.. so results probably aren't typical.
 
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The lower output on that model over the 89w seen on the other version, one being a single not dual core cpu, is one reason for seeing a lower temp as well as the board you are running. Even with a Zalman CNPS 9500 on the 3500+ here temps will climb at times with a good load to 43C. On the other hand the cpu temp after a full day and night of running along with some gaming saw a low 28C temp! The main reason for low temps in warmer weather? :confused: "Air Conditioing"! :D
 
There are 3x 3800+ models,

3800+ Lima (Single Core)
3800+ Windsor (65w Dual Core)
3800+ Windsor (89w Dual Core)

I may have misunderstood your response, but it sounded like you thought I had the single core version.

Also, I do have Air Conditioning :D

I don't have the air on today, though.. and the CPU Temp is currently at 32*c.. however, it sat on all night unused and this is the first time I've gotten to it since last night.. so it's probably because it sat around not used but on.
 
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