Penryns 1333mHz Bus limits overclocking?

Typhoon · 2 Dec 2007 at 18:22

Wondering what peoples thoughts are on Penryns running 333FSB as standard. This means that comparing to a Conroe (266mHZ) clocked at the same speed, they have lower mulitpliers. Unless your running an Extreme model with unlocked mulitplier, isn't that going to limit your overclock? So the cheapest quad Penryn the Q9300 runs at 2.5Ghz stock with a 7.5 multi and the Q6660 runs at 2.4Ghz but with a 9 multi. So if you have a WCing and a suitable MB, A 400FSB will get the Q6660 to 3.6GHz, but the Q9300 will need all of 480FSb on the MB to get to the same clock. Sure its going to run cooler, but I guess not many people will have MB and ram capable of running a 480FSB stabley long term. If your on air cooling then the Penryns may be a better bet, but if your have WC I wonder if the higher multi Conroes would OC higher?

weescott · 2 Dec 2007 at 18:37

A lot of ES Penryns have an FSB wall at 470mhz. Mine is stable right upto 454FSB without much effort, totally hit and miss to get it higher.

Penryns will be fantastic straight out of the box. Watercooling will be just for silence. With the execption of the QX chip.

Edit: highest clock I have managed to capture:

http://valid.x86-secret.com/show_oc.php?id=274661

XeNoN89 · 2 Dec 2007 at 21:12

weescott said:
A lot of ES Penryns have an FSB wall at 470mhz. Mine is stable right upto 454FSB without much effort, totally hit and miss to get it higher.

Penryns will be fantastic straight out of the box. Watercooling will be just for silence. With the execption of the QX chip.

Edit: highest clock I have managed to capture:

http://valid.x86-secret.com/show_oc.php?id=274661

What motherboard was that on?

Arcane · 2 Dec 2007 at 21:15

It says on the link, an Asus Maximus Formula.

Typhoon · 2 Dec 2007 at 21:51

So its looks like those Penryns are for cool running rather than Max overclock.

matt100 · 2 Dec 2007 at 23:56

Typhoon said:
So its looks like those Penryns are for cool running rather than Max overclock.

I dunno, that screenshot from weescott although not necessarily stable is a 1.1ghz OC... not to be sniffed at.

Blackout · 3 Dec 2007 at 00:01

Whooa I missed a trick I think. Is the 9550 CPU out yet or are you just a luck so-and-so weescott? I had thought they were due early next year?

If they are out to buy now that could solve my dilema over my next upgrade!

Typhoon · 3 Dec 2007 at 00:18

matt100 said:
I dunno, that screenshot from weescott although not necessarily stable is a 1.1ghz OC... not to be sniffed at.

True, but the Q9550 is going to be a £300 and up chip when released. Plenty of cheap Q6600's are doing that clock. The Penryns with high multi have shown to get well over 4Ghz on air, but its the cheaper low multi quads I'd be interested in. If it looks like the cheaper Penryns wont clock especially well, I might just plump for a Q6600.

matt100 · 3 Dec 2007 at 01:11

Typhoon said:
True, but the Q9550 is going to be a £300 and up chip when released. Plenty of cheap Q6600's are doing that clock. The Penryns with high multi have shown to get well over 4Ghz on air, but its the cheaper low multi quads I'd be interested in. If it looks like the cheaper Penryns wont clock especially well, I might just plump for a Q6600.

you need to look at the bench results too, clock for clock the penryn seems to hammer the kentsfield. For example a mid 3ghz penryn pulling sub 10s 1mb super iirc. Either way it was doing times that would have needed 6-800mhz more on a kentsfield.

dbmzk1 · 3 Dec 2007 at 01:35

matt100 said:
you need to look at the bench results too, clock for clock the penryn seems to hammer the kentsfield. For example a mid 3ghz penryn pulling sub 10s 1mb super iirc. Either way it was doing times that would have needed 6-800mhz more on a kentsfield.

Kentsfield IS penryn.

weescott · 3 Dec 2007 at 01:38

Sorry Matt but thats just wrong! It takes a mid 4Ghz Yorkfield to do under 10 second Super PI. And roughly 500mhz less than Kentsfield.

On the whole Yorfield is 200 to 500mhz faster clock for clock than Kentsfield depending on the application.

weescott · 3 Dec 2007 at 01:50

Blackout said:
Whooa I missed a trick I think. Is the 9550 CPU out yet or are you just a luck so-and-so weescott? I had thought they were due early next year?

If they are out to buy now that could solve my dilema over my next upgrade!

It's an ES chip. These wont be out till next year.

matt100 · 3 Dec 2007 at 08:11

weescott said:
Sorry Matt but thats just wrong! It takes a mid 4Ghz Yorkfield to do under 10 second Super PI. And roughly 500mhz less than Kentsfield.

On the whole Yorfield is 200 to 500mhz faster clock for clock than Kentsfield depending on the application.

ok fair enough on the specifics I really don't have the attention span to keep up with the names etc, my point was how much faster that chip you have seemed clock for clock than say a Q6600.

I recall seeing a sub 10s superpi? or was I drunk (again)?

gurusan · 3 Dec 2007 at 08:24

my money is on the booze

mattyrigby00 · 3 Dec 2007 at 08:26

dbmzk1 said:
Kentsfield IS penryn.

kentsfield = 65nm quad core
yorkfield = "penryn" 45nm quad core

gurusan · 3 Dec 2007 at 08:35

Yeah i didn't understand that statement. Kentsfield does not = Penryn....

matt100 · 3 Dec 2007 at 08:48

gurusan said:
my money is on the booze

lol! cheers mate

Blackout · 3 Dec 2007 at 11:07

weescott said:
It's an ES chip. These wont be out till next year.

Youre a 'Lucky so and so' then!

Cheers for the info weescott!

weescott · 3 Dec 2007 at 20:10

matt100 said:
I recall seeing a sub 10s superpi? or was I drunk (again)?

Drunk? Allmost Scottish m8

There are loads of QX9650's doing sub 10 second 1mb SuperPi runs (at about 4.6Ghz), its actually kina boring now! Just over 10s on Air too.

Wolfdale CPU's are what I am waiting for.