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AMD 3800+ for server?

post #1 of 7
Thread Starter 
I am planning on building a server in the near future and I am wondering if I under clocked my AMD 3800+ 89W AM2 CPU from 2.0GHz to say 1.8GHz would I be able to notice the difference in power consumption?

Also if I underclocked it would the wattage get at or below 45W like the newer CPUs are set at?
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post #2 of 7
You might see a little difference. I don't think you'll see too much difference in the long run. I overclocked my x2 4200+ from 2.2 to 2.4 and I saw almost no difference.
post #3 of 7
You may even be able to under volt it and still get a good speed from it....
Try slowly dropping the vcore at stock speeds and see how far you can run stable
    
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post #4 of 7
A 45w 2GHz X2 will use around 45w under full load.
A 89w 2GHz X2 wll use around 89w under full load.

An undervoltage/clocked 89w is not the same as a 45w CPU. Also, newer X2 idle at less than 10w while your older X2 idles at around 15w.

What I recommend is set your CPU's voltage to .9-1v and see what clockspeed is stable. You can also just enable CoolNQuiet and that downclocks/downvoltage your CPU to 1v.
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post #5 of 7
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
A 45w 2GHz X2 will use around 45w under full load.
A 89w 2GHz X2 wll use around 89w under full load.

An undervoltage/clocked 89w is not the same as a 45w CPU. Also, newer X2 idle at less than 10w while your older X2 idles at around 15w.

What I recommend is set your CPU's voltage to .9-1v and see what clockspeed is stable. You can also just enable CoolNQuiet and that downclocks/downvoltage your CPU to 1v.
I will look into the CoolNQuiet feature, and changing the voltage on it. Thanks everyone for the quick responce! I just found out I still have this CPU laying around and I thought I might as well use it and save some money on my server.
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post #6 of 7
Quote:
Originally Posted by SeanEE89 View Post
if I under clocked my AMD 3800+ 89W AM2 CPU from 2.0GHz to say 1.8GHz would I be able to notice the difference in power consumption?
Sean, unless the voltages change I can't imagine a decrease in power consumption. Would dropping the voltages change power consumption? This is unclear to me. The best way to find out is to conduct these tests on your own and share the results with us

Good luck
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post #7 of 7
You would notice a very SLIGHT difference lol - but it would be more theorectical than real frankly lol.

If you really want to have a go at reducing your consumption - try (especially if your server doesnt need that extra crunching power ) underclocking the chip as the others said - along side under volting it.
Typically - the slower the frequecy the chip operates at - the less voltage (and current) it demands.


In addition - you should pay attention to the nature of your underclock;
clocks that are more MULTIPLIER dependent (eg - 15 x 135MHZ = 2000MHZ) are found to require more voltage. (the multi is the voltage nabber) as opposed to the same OC - at say (10 x 200MHZ = 2000MHZ).

The same applies with underclocking - so, that may be helpfull to bear in mind

good luck.

EDIT: that link in my sig about laptop battery life may have something usefull for your endevour.

Do tell how it works out ^_^
Edited by Grim - 6/16/08 at 10:10am
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