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D915 Overclocking

L

Linden

[H]ard|Gawd
Joined
Sep 8, 2005
Messages
1,199
Considering buying a D915. Anyone here have experience overclocking them? I would mate it with an Asus P5WD2 in a well ventilated case cooled with Big Typhoon. I've got three systems like that now running, but with D820s all overclocked to 3.7GHz each. Electricity bill is swollen and my home office gets...rrrealy warrrm.

Sure, I'd love to replace the guts on those three machines for a nice OC'able mobo and a Conroe, but then the upgrade cost would be three or four times what I would spend on D915's.

I'd really appreciate your comments on D915 versus D820 - power consumption, heat output, overclockability...and if I'm a fool to 'upgrade' from 820 to 915.
 
Its wouldt be 'foolish' to do the upgrade. 65nm vs 90nm isnt a big difference either, but the power consumption difference is huge between smithfield and uhh...whatever the 900 series is, i forgot the core name. The overclock will be much better too, probably about 4-4.2ghz.
 
Hey, thanks. The power consumption and heat are two big issues. Economic logic - buy three 915's online or eBay $135-140 each, sell my old 820s at approx $75 each = still probably lose money considering I'll probably only run the 915s for a year or less -- 12 months @ 25% power savings times three CPUs). But then, my home office will be a lot more comfortable....

And the overclocking would be FUN. :D And Folding@Home production would definitely go up. :D

OK, maybe I've convinced myself...but the wife unit?

Please keep any comments coming. First...or second or third hand information about overclocking the D 915 would be welcomed.
ut the power consumption difference is huge between smithfield and uhh...whatever the 900 series is, i forgot the core name
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That would be Pressler for the 9XX series.
 
I just got a 915, haven't had a chance to overclock it yet, but I plan to work on it this weekend. I'll let you know how it goes.
 
Linden said:
Please keep any comments coming. First...or second or third hand information about overclocking the D 915 would be welcomed.
That would be Pressler for the 9XX series.
Click to expand...
I have overclocked 4 805 and 2 930d.

Thet both have something in common and that is the rate they overclcock , which you already know. Unlike other cpu's you dont need good ram to overclock an extra 1ghz but that said good ram does give you performance and if you could buy the good ram cos there is no point having a fast cpu when your ram falls behind , it all has to be balanced like eclipse allways says.

Also the temperatures with the 930 is better cos its binned higher than the 805. They are great cpu's after the 3.6ghz mark . Before that its ok .

Whats the ram you are going to use?
 
I'll sell you my 920 $120 shipped, Asus P5WD2-E (975) motherboard for $180, both $300

It does 3.73Ghz on stock voltage and should run much cooler than an 805.
 
It'll be a huge improvement if you get the new C1 stepping as it also reduced power consumption from the older steppings. I have only hear of people getting the C1 stepping with 915s and 930s so far not sure about the rest but that's also something to look for when buying.
 
Well I say why not. Most of these new C1's are hitting 4GHZ on really low voltage. Should give you a nice boost for FAH.
 
Linden said:
Hey, thanks. The power consumption and heat are two big issues. Economic logic - buy three 915's online or eBay $135-140 each, sell my old 820s at approx $75 each = still probably lose money considering I'll probably only run the 915s for a year or less -- 12 months @ 25% power savings times three CPUs). But then, my home office will be a lot more comfortable....
Click to expand...
You're failing to factor AC into your power bill. Less heat output means you have to run the AC less.
 
You're failing to factor AC into your power bill. Less heat output means you have to run the AC less.
Click to expand...
Ah, that was an easy variable to factor - 0. I live in Eagle River Alaska. We have no air conditioning. The warmest summer days here are mid-seventies F. My home office is on the third floor, so I get a lot of residual heat from the other two floors moving upwards, but still, I can open the window and turn on a fan to exhaust the heat.

Concerning power consumption: Since I was able to clock this 915 400MHz (effective 800MHz) higher than the 820 it replaced, the power usage delta is zero. At 4.1GHz this computer is is consuming exactly the same power as the 820 was at 3.7. Oh well....
 
In that case, a pretty good solution to keep the place cool could be a pair of fans, one intake, one exhaust ;) works wonders for circulating air through a room/house, even if they're placed on opposite ends of the house.
 
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