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PentiumD 915 or C2D E6600 underclocked

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April 18, 2007 5:48:24 PM

I was wondering if anyone would know what would be faster. My home theater Pc is a Pentium D 915 OC to 3.2ghz, now the board i have it on only allows C2D with 800fsb. If i put my e6600 in it, it will turn it down to 1.8ghz@800fsb (according to gigabytes website). Will the C2D sitll be faster underclocked or will the PD thats overclocked and running at full strength? By the way, I am going to eventually change it out, I recently upgraded my gaming computer to a EE and not using the e6600 at the moment, so I dont need the "who cares buy another motherboard comments." :D 
April 18, 2007 5:49:55 PM

Quote:
I was wondering if anyone would know what would be faster. My home theater Pc is a Pentium D 915 OC to 3.2ghz, now the board i have it on only allows C2D with 800fsb. If i put my e6600 in it, it will turn it down to 1.8ghz@800fsb (according to gigabytes website). Will the C2D sitll be faster underclocked or will the PD thats overclocked and running at full strength? By the way, I am going to eventually change it out, I recently upgraded my gaming computer to a EE and not using the e6600 at the moment, so I dont need the "who cares buy another motherboard comments." :D 


The C2D would still be faster. Are you sure your board supports C2D, though? You could also just overclock the C2D if you felt it wasn't living up to your expectations.
April 18, 2007 5:56:07 PM

If your motherboard only supports Core 2 Duos running with an 800 mhz front side bus, save yourself (for right now), the $150 and get an E4300. With your motherboard you might be able to do a modification to the chip itself (inexpesive, hard to mess up), and bring it up to 2.4 gigahertz. Benchmarks I've seen for this peg it at a level of an AMD 5200+ dual core. So either spend $150 for an E4300 or bump up your Pentium 4 to 5.2 gigahertz to see an equivalent performance level.

And to answer your question, I do not believe that Conroe core Core 2 Duos will work with your motherboard.
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April 18, 2007 5:56:32 PM

I have a Gigabyte 945pl-s3 and according to the website it will run it but at the lower speeds.
April 18, 2007 5:59:30 PM

Quote:
If your motherboard only supports Core 2 Duos running with an 800 mhz front side bus, save yourself (for right now), the $150 and get an E4300. With your motherboard you might be able to do a modification to the chip itself (inexpesive, hard to mess up), and bring it up to 2.4 gigahertz. Benchmarks I've seen for this peg it at a level of an AMD 5200+ dual core. So either spend $150 for an E4300 or bump up your Pentium 4 to 5.2 gigahertz to see an equivalent performance level.

And to answer your question, I do not believe that Conroe core Core 2 Duos will work with your motherboard.


That mod only works on motherboards that support the 1066Mhz FSB.
April 18, 2007 5:59:57 PM

But see the whole thing to that is that I already own a e6600, its been sitting for about 3 weeks since I got a x6800 for my main computer. Just wondering if it would be worth to just throw in my other one if better the the PD at 800Fsb.
April 18, 2007 6:05:17 PM

Quote:
If your motherboard only supports Core 2 Duos running with an 800 mhz front side bus, save yourself (for right now), the $150 and get an E4300. With your motherboard you might be able to do a modification to the chip itself (inexpesive, hard to mess up), and bring it up to 2.4 gigahertz.


If you're talking about the 266FSB pin mod, that entirely defeats the purpose of getting a 200FSB e4300 because the point is he can only use 200FSB.

Quote:

So either spend $150 for an E4300 or bump up your Pentium 4 to 5.2 gigahertz to see an equivalent performance level.


He clearly stated he already owns a e6600.

Quote:

And to answer your question, I do not believe that Conroe core Core 2 Duos will work with your motherboard.


He says the website clearly states it will work.


Is anyone actually reading the OP?

To answer the original question, yes a 1.8GHz e6600 will still be faster than a 3.2GHz PD. As a general rule, Core 2s have twice the per-clock performance of Pentiums 4s.

Also, when you say you upgraded to an EE, that does mean a x6800 or qx6700 right?
April 18, 2007 6:27:24 PM

Sell your E6600 now and buy an E4400 on 23rd this month.
April 18, 2007 6:52:52 PM

well what would be the difference then if the e6600 is turned down to 1.8ghz@800fsb is that the same specs as the e4300? With just 4mb of cache instead of 2mb? Wouldnt it bench the same then?
April 18, 2007 6:54:59 PM

Settle down guy. :p 

"He clearly stated he already owns a e6600."

Missed that. Read "my e6600" as "a e6600" in his post. The rest of the post followed from that misreading.


Edit: Even at 1.8 ghz the processor will likely be faster then the Pentium, but not by much.
April 18, 2007 9:18:25 PM

Thanks for tips. I just wanted to check to see if it was worth it. Ill give it a shot and see it goes.
April 19, 2007 7:01:38 PM

it will run faster.

It will also offer you an even greater benefit

COOL!

the C2D running underclocked like that SHOULD in thoery run MUCH cooler than the Pentiums which run at a much higher thermal ouput.

With the lower thermal output of the C2D, you could put a nice small, slow cooler on it that would be extremely quiet. Which offers a lot more benefit to HTPC than an extremely fast core IMHO
April 19, 2007 8:26:00 PM

sell the Pd with mobo and get a good mobo back for the money.... problem solved. :roll:

otherwise de e6600 isn`t much faster since it looses 600mhz clockspeed and 266mhz fsb. at 1.8 it equals the 3.2ghz i guess.
April 19, 2007 8:42:04 PM

what mpasternak said is right.
you mentioned that it is a htpc.
therefore, if you are using a stock hsf or using any heatsink with a fan, switch it out to get a passive heatsink.
underclocking it should lower the overall temp by a few degrees. if you get a passive heatsink, that's less ambient noise for you while watching your movies. [assuming you're using a hsf]
:]
April 20, 2007 2:24:52 AM

Well I switched it out, and let me tell you at the lower speeds it does feel snappier then the pd. I am actually using a coolermaster aquagate mini to cool the cpu and its running at about 26c, which is actually nice and quiet.

I tried the overclocking suggestion and I can "overclock" the cpu to stock 2.4, but then the temps shoot up to 40c at idle cause I have to crank the volts up to about 1.4 to achieve it, but its not needed. I will leave it at 1.8 cause for a htpc it runs perfect. Thanks for the suggestions everyone. :) 
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