Pentium D 915

[Golgatha]

Originally posted by: Cheex
Interesting...

I'm buying a Freezer 7 Pro along with it. The Asrock only allows stock cpu voltage remember (this is the key here).
How high at stock voltage with that kind of cooling ?

Provided the motherboard can handle the FSB, I'd say 3.73Ghz is very easily attained on stock voltage. 4.0Ghz isn't really out of the ballpark on stock voltage either though. However, 3.73Ghz is a nice number to have for a 1066FSB.

 

[Golgatha]

Originally posted by: t3h l337 n3wb
I still don't understand why you're even considering a Pentium D in the first place when the E6300 and 3800+ are much better choices.

He obviously wants a Conroe at some point, so why even suggest the 3800+? The E6300 will be $50-$100 more than a 915 and that money can go towards a video card, RAM, etc. now; which will give him an overall better computing experience.

 

[Golgatha]

Originally posted by: stevty2889
Don't expect to get much past ~220mhz FSB on that board, especialy with no vcore options. The 805 is a flamethrower, but the 800mhz FSB pentium-d's all tend to get stuck around 220mhz FSB on lower end motherboards.

If the FSB won't go past 220mhz, then the board should be returned for a refund. The chipset is rated for 266Mhz (1066FSB/4)?

 

[Cheex]

The board itself can get the FSB to about 340 but...no cpu voltage adjustments...so...
the cpu oc is limited to how far the FSB can take it on stock voltage.

Stock: 200 * 14 = 2.8GHz
Desired: 250 * 14 = 3.5GHz

I'd just love a 25% OC...is that possible on this board with stock voltage ?

 

[Cheex]

Since the 915's i take it aren't that popular...could you base the OC on that of the 920?
from what i understand...the 915 is the same chip as the 920 but they disabled the VT on it and repackaged them as 915. Am I correct?...and if so...base the OC ability on that and tell me what you come up with.

 

[stevty2889]

Originally posted by: Golgatha

Originally posted by: stevty2889
Don't expect to get much past ~220mhz FSB on that board, especialy with no vcore options. The 805 is a flamethrower, but the 800mhz FSB pentium-d's all tend to get stuck around 220mhz FSB on lower end motherboards.

If the FSB won't go past 220mhz, then the board should be returned for a refund. The chipset is rated for 266Mhz (1066FSB/4)?

It seems to be a bug that occurs when using an 800mhz FSB pentium-D. It's not the chip itself, and it's not the motherboard, it's a combination of the board with the chip. My 920's and 820 all got stuck around 220mhz FSB on my NF4 board, and 3 differant 945 chipset boards, including 2 that support 1066mhz FSB. All of them made it to at least 245mhz FSB using a single core, but with a pentium-d they wouldn't post past ~220mhz FSB. Meanwhile the same chips made it to 3.7ghz on a differant board, and my 805 runs at 3.7ghz on NF4 board that wouldn't post past 224mhz with the 920's.

 

[Cheex]

ouch...so isn't there anything you can do to "free it up" ?
like a BIOS update or something?

were you referring to the ASRock i'm talking about?

 

[stevty2889]

Originally posted by: Cheex
ouch...so isn't there anything you can do to "free it up" ?
like a BIOS update or something?

were you referring to the ASRock i'm talking about?

On one board I got around it by increasing the PCIe frequency, but that ended up giving me artifacts on the graphics card. Actualy, on my asrock board(not the same one as yours) increasing the FSB actualy decreased the CPU speed.

 

[Cheex]

Originally posted by: stevty2889

Originally posted by: Cheex
ouch...so isn't there anything you can do to "free it up" ?
like a BIOS update or something?

were you referring to the ASRock i'm talking about?

On one board I got around it by increasing the PCIe frequency, but that ended up giving me artifacts on the graphics card. Actualy, on my asrock board(not the same one as yours) increasing the FSB actualy decreased the CPU speed.

rofl...that is truly wierd...(didn't mean to laugh)...but it is kinda funny.
so...do you know anything about my board?.......anyone?

 

[Golgatha]

Hmm, my 920 runs 14x287Mhz for 4.018Ghz on an ASUS P5WD2 Premium board. Don't really know how well Via or nVidia chipsets overclock, but this one is rock solid stable at 1:1 memory timings. I can easily hit 3.73Ghz without a voltage increase and 4.018Ghz didn't really require an increase either. I suppose I left the voltage bumped up a little over stock "just in case" and because the thermals were pretty much the same when at full load.

Edit: This is just purely speculation, but I think the overclockability of the ASUS boards has a lot to do with the 8phase power distribution. Very few boards have this feature and IMO it is worth the slight price premium to have it.

 

[Cheex]

that sounds encouraging for my D915 BUT...no one is mentioning an approximate overclock on my ASRock.

 

[ste216]

I'm in exactly the same situation... was on the verge of buying Conroe but am now thinking a Pentium D to save money... then upgrading to Conroe if or when I need to. Let us know how you get on with your build!

 

[Cheex]

Is there anyone out there with this configuration or knows how well it works?