P-805 and expensive mobos?

[perdomot]

I like the article at Toms but find it baffling that they chose an expensive mobo when the main selling point of the 805 is how inexpensive it is. I went a different route getting an Asus 865PE mobo that only costs $80 and a XP-90 heatsink for $30. I had good pc3200 ram and a good agp vid card from my back up rig so I saved money there. Totaled up, I spent about $240 to make a dual core rig that runs smooth and cool at 3.5 Ghz. Now unless someone can point out what I'm missing by not getting an expensive mobo, vid card and ram, I think I'm doing pretty darn good. BTW, I'm not a gamer so I can see where the other components might benefit that but this rig is for video encoding and general web surfing/music so I took that into account.

 

[Duvie]

NOt another 805 thread!!!!

Your mising about 500mhz more of speed, more heat (even for the hsf you have), and more voltage..

I think if you have that thing in the high 50's to low 60's under full load then consider it a great buy.....


Are the 865pe mobos rumored to be possibly conroe ready?

 

[perdomot]

Hi Duvie. Under loads, the chip is running between the high 50's-low 60's and that's at 1.3 vcore. Considering the tremendous benefits I've seen so far in my encoding programs, I'm not gonna sweat the 500mhz especially since most folks cpus seem to be topping out at around 3.6 or so.

 

[AkumaX]

i didn't know P-D's could run on Canterwood/Springdale

 

[Faikius]

The more expensive boards, the P5WD2 for example, are simply better overclockers. They seem to be the only boards that let people consistently get 4Ghz+ out of their 800-900 series P4's IF you have the proper cooling.

THG was simply tyring to show how far the 805 could be pushed. Whether or not the total cost of running an 805 at that speed is worth it to you is something you have to decide for yourself.

 

[Absolute0]

OP i am 100% with you, you have proven that you don't NEED a 200$ motherboard like so many ignorant people claim. I am glad that you are happy with the purchase. It is unfortunate that people won't stop hating the 805D.

 

[TurtleBlue]

Thanks, Perdomot, for your post!

I also am considering an 805 setup with a sub $100 mobo (Asus or Gigabyte). I have not tried to O/C in the past but would like to try with this bad boy. Since I don't have a PCI vid card handy I am going for one of their video equipped mobo's. This will pay for the value ddr2 ram that will go with this setup.

Since I live in a co-op in NYC that the utilities are also included in the monthly maintenance I don't have to worry about blowing the monthly budget on the increased electrical usage resulting from o/c.

This setup will also be a non-gaming pc (my 3.06 ghz ati 850 tower takes care of that) used for business software, Distributed Computing & DVD burning.

 

[fire400]

I know for a fact, that if you put an 805 D with a $200 Asus LGA775 board, clocked at 4.1GHz with water cooling and Crossfire'd with 1900XTX cards with RAID 0 on NCQ drives and Corsair DDR2 XMS sticks, it will own your AMD fanboy RIGS. so hands down and take the pain.

 

[perdomot]

Unfortunately, proper cooling usually means water which is much more expensive than a good HSF like the XP-90 and that again defeats the purpose of getting a cheap chip and OCing it. Running a 3.5 Ghz dual core cpu that only cost $130 is unreal and the bottom line remains the money. All the fancy equipment negates the savings IMO.

 

[DrMrLordX]

Originally posted by: fire400
I know for a fact, that if you put an 805 D with a $200 Asus LGA775 board, clocked at 4.1GHz with water cooling and Crossfire'd with 1900XTX cards with RAID 0 on NCQ drives and Corsair DDR2 XMS sticks, it will own your AMD fanboy RIGS. so hands down and take the pain.

Whose AMD fanboy rigs are we talking about here? It won't beat the people with 2.8-3 ghz Opteron/X2 rigs with identical components.

 

[Absolute0]

Originally posted by: DrMrLordX

Originally posted by: fire400
I know for a fact, that if you put an 805 D with a $200 Asus LGA775 board, clocked at 4.1GHz with water cooling and Crossfire'd with 1900XTX cards with RAID 0 on NCQ drives and Corsair DDR2 XMS sticks, it will own your AMD fanboy RIGS. so hands down and take the pain.

Whose AMD fanboy rigs are we talking about here? It won't beat the people with 2.8-3 ghz Opteron/X2 rigs with identical components.

lol that's true, if you consider me an AMD fanboy, my 170 @ 3.15 Ghz will beat the crap out of any P4 at 4.1 Ghz.

 

[stevty2889]

Thats the only good thing about the 805, because of the 533mhz FSB, you don't need an expensive motherboard to get decent overclocks, just really good cooling and a hefty power supply. It's the 800mhz FSB chips that are getting stuck at around 225mhz FSB on the cheaper motherboards(ie 945 chipset), unless you OC the PCIe which makes the graphics card wack out. The only 2 boards I have seen getting an 800mhz FSB pentium-d get to 4ghz or higher is the P5WD2 premium and P5WD2-E premium.

 

[DrMrLordX]

Originally posted by: perdomot
Unfortunately, proper cooling usually means water which is much more expensive than a good HSF like the XP-90 and that again defeats the purpose of getting a cheap chip and OCing it. Running a 3.5 Ghz dual core cpu that only cost $130 is unreal and the bottom line remains the money. All the fancy equipment negates the savings IMO.

You are correct sir.

 

[Amaroque]

Originally posted by: fire400
I know for a fact, that if you put an 805 D with a $200 Asus LGA775 board, clocked at 4.1GHz with water cooling and Crossfire'd with 1900XTX cards with RAID 0 on NCQ drives and Corsair DDR2 XMS sticks, it will own your AMD fanboy RIGS. so hands down and take the pain.

Wow! You're very naive. Oh well, ignorance is bliss.

 

[stevty2889]

Originally posted by: fire400
I know for a fact, that if you put an 805 D with a $200 Asus LGA775 board, clocked at 4.1GHz with water cooling and Crossfire'd with 1900XTX cards with RAID 0 on NCQ drives and Corsair DDR2 XMS sticks, it will own your AMD fanboy RIGS. so hands down and take the pain.

If you believe that, I've got some ocean front property for you in Nevada.

 

[Aenslead]

Well, I'd like to impress you all.

I am currently runing a Pentium D 805 at 3.33Ghz on an ASROCK 775i65GV, which, as name implies, uses a mere 865GV Intel chipset... which costs less than 50usd; I increased the FSB to 166Mhz with no ptoblem at all... procesor even gets detected as Pentium 5 .

Combo costs a grand total of... 180Usd.

Sure... its noisier than my Athlon 64... but hey, dual core on the cheap. Fast. Good deal.

 

[Markfw]

Well, my 805 is on an ECS RC410L, the combo was $139 at Fry's. Only thing is, it would not run over 3 ghz without shutting down on the stock HSF(running 70c). So I got a Big Typhoon, and now it runs 3.5 ghz at 1.2 vcore and 43c max both cores loaded. Not bad for $190, but it really heats up the computer room.

 

[Absolute0]

Can't heat up the computer room that much if it's loading at 43c on air, my 170 on air with its IHS on would be loading around 58c with the voltage i'm currently at

 

[Zap]

Originally posted by: Absolute0
Can't heat up the computer room that much if it's loading at 43c on air

Oh yes it can! He's got a Big Typhoon so he's transferring a LOT of that heat into air. That's sauna temperatures right there.

 

[Absolute0]

I'm saying I think my 170 @ 3.15 Ghz with 1.53v puts out more energy

If you guys get me the stock Wattage on the 170 and 805D i'll tell ja which of these two puts out more energy

 

[Markfw]

Originally posted by: Absolute0
Can't heat up the computer room that much if it's loading at 43c on air, my 170 on air with its IHS on would be loading around 58c with the voltage i'm currently at

I good radiator (which is what an HSF does) the better it is, the more heat it transfers, thus the target is cooler. Remember, it was 70c on the stock one. So this transfers heat very well, hence the room being hot. I also have an 820 in that room, which by itself puts out a lot of heat, but adding the 805 was the last straw !

 

[Absolute0]

Yeah, the P4s are inefficient little focks, i'm calculating my 170 vs. an 805D @ 3.5

 

[Absolute0]

Well from what i've read, the Opteron 170 is 110w and stock voltage is 1.325. Therefore by me running it at 3.15 Ghz with 1.53v, power consumption is
110(3150/2000)(1.53/1.325)^2 = 231 watts

And the 805D was reported as 95watts with a default voltage of 1.3, by mark running at 3.5 Ghz with 1.2v his consumption is
95(3500/2660)(1.2/1.3)^2 = 107 watts

This has got to be off somewhere but as you can see the difference is partially because my 170 is insanely overclocked, and i'm heftily overvolting whereas mark isn't.
As i said, if i ran this speed on air it would probably reach or exceed 58c. I know it loaded at 49c with 1.48v in a cool room.

I think the stock power consumption on the 805D exceeds 95, but 95w is the only figure i could find.

Anyway, my 170 doesn't put out THAT much heat, it heats the room but i open a window. I don't think you can really say an undervolted 805D is heating up the room so much.

From my searching the internet for power consumption specs, i repeatedly came across THG findings of 4.1 Ghz and 260watts. People HAVE to keep in mind, THG overvolted their CPU very heavily. Whereas stock volts are 1.3, they were using 1.67v, so much that the motherboard warned of overvolting. Needless to say i would NOT run 1.67v on an Opteron and these have higher default volts. Power consumption is related to the square of the voltage so it is quite clear that THG's ridiculously high wattage findings are due hugely because of their unsafe use of voltage.

 

[Markfw]

I saw at tom's they said an 805@4.1=150+ watts, so my 3.5 would be somewhere around 130-140 I think. So 110 watts is not even close. Not to mention it will blow the pants off an 805@3.5

 

[Absolute0]

The only reason THG got a big # at 4.1 Ghz is because they were using 1.67 volts, you on the other hand are using 1.20.