Thursday, November 20th 2008

Phenom II X4 Overclocks to 6.00 GHz on LN2

During an event by AMD held at its facility in Austin, Texas, the engineers took an engineering sample of the unreleased Deneb core based Phenom II X4, installed a copper-pot for liquid nitrogen cooling, and dropped the operational temperature to -185 °C. They then jacked up the vCore to 1.90V, to facilitate a clock speed of over 6.00 GHz!

At this point the exact frequency isn't known. Cameras weren't allowed at the event, and so no clear pictures were taken. Earlier the company had released slides to its channel contacts, telling that Phenom II would overclock very well, and 24x7 overclocks beyond 3.60 GHz on air didn't sound unreal. At the same event, AMD showcased Deneb chips doing 4.00 GHz with air-cooling (with vCore set at 1.6V).


Sources: NordicHardware, Legit Reviews
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111 Comments on Phenom II X4 Overclocks to 6.00 GHz on LN2

#1
a_ump
same here, though i don't plan to upgrade my CPU till probly next xmas, q6600 is only at 3ghz but hopefully with p45 will be 3.2-3.4, and that should hold me over this coming year till xmas.
IF amd do put out processors superior to penryn and great price/performance then they will have my money :D
Posted on Reply
#2
Bluesman
Update

The site I posted, markbench.blogspot.com, has now been discredited. See comments on their site as well as xtremesystems news section. All graphs are fake.

However, we now have some "legitimate" news on Deneb overclocking. See HERE. Many thanks to Informal, at xtremesystems, for this site reference.
We are not allowed to give specifics on speeds at this time, but as a generalization one can expect the following stable performance without too much tweaking effort:

* Air: Around 4GHz is a safe area to target with decent aftermarket cooling & mild voltage increase. When I say "around" that means above and below, so don't gripe at me if your CPU won't hit 4GHz, there is no guarantee with overclocking. Also there aren't exactly huge amounts of CPUs out in the wild yet, so observations are somewhat limited.
* LN2: If you were thinking 5GHz, guess again (and guess higher)... It was like the Energizer Bunny commercials... they just keep going, and going, and going. To say in excess of 5GHz is an understatement, but that's about as detailed as I'm allowed. There was another large leap too between what was "stable" and what you could get a CPU-Z screenshot of, so that shows even more promise in the long term as yields will undoubtedly improve.
* Water & Phase Change: Obviously somewhere between Air & LN2. This is really going to vary based on what you are using and your temps

While I can't give exact numbers in terms of GHz, I can give you some of the voltages and temps seen while running the Crysis demo. Keep in mind these temps are not anywhere near 100% CPU usage, but they aren't exactly idle either.

* Air: Cooler Master Hyper Z600 - Around 1.5-1.55V / 33C
* Water/Tec: CoolIT Freezone Elite - Around 1.6V / 38C
* Phase Change: VapoChill - 1.7V / Below 0C (software / MB wouldn't report negative numbers)
* LN2: 1.75V (at least during the Crysis demo... :eek:)
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#3
DaC
by: Bluesman
The site I posted, markbench.blogspot.com, has now been discredited. See comments on their site as well as xtremesystems news section. All graphs are fake.

However, we now have some "legitimate" news on Deneb overclocking. See HERE. Many thanks to Informal, at xtremesystems, for this site reference.
33C on 4ghz @ 1.55v on air wow!!!!

Much better then my lapped Q6600 72C on 3.6ghz @ 1.45v with xigmatek S1283 and MX2 on full....... idle about 45C
Posted on Reply
#4
Urbklr
If this overclock info is true...I will be buying as soon as they come out, I already have the mobo picked out:D
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#5
DrPepper
The Doctor is in the house
by: DaC
33C on 4ghz @ 1.55v on air wow!!!!

Much better then my lapped Q6600 72C on 3.6ghz @ 1.45v with xigmatek S1283 and MX2 on full....... idle about 45C
I was wondering why you had such high temps then realised you live in Brasil.
Posted on Reply
#6
DaC
by: DrPepper
I was wondering why you had such high temps then realised you live in Brasil.
Well actually when I put my fan on the side of the open pc it drops to about 67C on a ambient temp. of about 28C
Posted on Reply
#7
DrPepper
The Doctor is in the house
by: DaC
Well actually when I put my fan on the side of the open pc it drops to about 67C on a ambient temp. of about 28C
ahhh :p
Posted on Reply
#8
jbunch07
Not sure if it has been said, but does anyone know if this overclock was done on am2+ or am3 platform?
Posted on Reply
#9
btarunr
Editor & Senior Moderator
by: jbunch07
Not sure if it has been said, but does anyone know if this overclock was done on am2+ or am3 platform?
AM2+, some say on a Gigabyte GA-MA790GP-DS4H.
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#10
jbunch07
ok thanks that's what I was thinking...I wonder if there will be any noticeable performance gain going from am2 to am3...amusing that memory is the only thing being changed.
Posted on Reply
#11
ShadowFold
by: jbunch07
ok thanks that's what I was thinking...I wonder if there will be any noticeable performance gain going from am3 to am2...amusing that memory is the only thing being changed.
I think its got higher hyper transport along with DDR3 but not 100% sure.
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