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AMD Phenom hits 7GHz

AMD Phenom hits 7GHz

The team took an AMD Phenom II X4 975 processor and got it running at over 7GHz, thanks to liquid nitrogen.

An overclocking event in Brazil has achieved remarkable results, with an AMD Phenom II X4 975 CPU coaxed to speeds of over 7GHz.

The quad-core chip, which ordinarily runs at a frequency of 3.6GHz with an 18x clock multiplier, was pushed to an overall speed of 7.134GHz by using a HTT frequency of 226.49MHz and a CPU multiplier 31.5x - an impressive feat.

The team, from the XtremeSystems Forums, used an Asus Crosshair IV motherboard featuring an AMD 890FX chipset and a seriously powerful liquid nitrogen-based cooling system to achieve their overclock, which proved slightly unstable during extended benchmarking. A change to a bus frequency of 220.4MHz, however, netted a rock-solid 6.944GHz overclock.

The world-record attempt wasn't without its casualties, however: a modified Nvidia GTX 580 1.5GB shorted out during the overclocking and was consigned to scrap, replaced for the official attempt by an apparently more durable - although significantly slower - ATI Radeon HD 4890 card.

It's an impressive feat, and a considerable win for the team behind it - but says little about the Deneb-based processor under general usage. Overclocking contests that use liquid nitrogen for a coolant are impressive and result in very high figures, but are somewhat impractical for day-to-day use compared to an air- or water-based cooling system.

Are you impressed that the team were able to get the AMD Phenom II to over 7GHz, or just saddened that an Nvidia GTX 580 had to sacrifice its life in the attempt? Share your thoughts over in the forums.

26 Comments

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mrbens 29th November 2010, 17:11 Quote
Awww the poor 580 :)

Impressive overclock but obviously no chance of us getting speeds like that at home!
WarrenJ 29th November 2010, 17:15 Quote
Poor 580, RIP.

And before anyone says anything Its a Modified 580.
sixfootsideburns 29th November 2010, 17:16 Quote
Quote:
Originally Posted by mrbens
Impressive overclock but obviously no chance of us getting speeds like that at home!

Pshhh, what are you talking about I run Crysis at those clocks on a regular basis! No problem there duuddeeee
frontline 29th November 2010, 17:33 Quote
Wonder if 7GHz fixes the stuttering in COD Black Ops...
thehippoz 29th November 2010, 18:41 Quote
of course fermi blew up.. that was expected!
Centy-face 29th November 2010, 19:25 Quote
Quote:
Originally Posted by frontline
Wonder if 7GHz fixes the stuttering in COD Black Ops...

Ha genius! Love it.
HourBeforeDawn 29th November 2010, 19:56 Quote
wow awesome
CAPSLOCK 29th November 2010, 19:58 Quote
Nice, but can it play Metro 2033?
cgthomas 29th November 2010, 20:19 Quote
Quote:
Originally Posted by sixfootsideburns

Pshhh, what are you talking about I run Crysis at those clocks on a regular basis! No problem there duuddeeee

I'm running that too at the moment - only getting 43 fps at the moment. How much are you getting
leexgx 29th November 2010, 20:29 Quote
91fps in an gtx480 16x aa, no lag

i7 3.8 ht off last time testing (test with it back on see if any stuttering still the game does support muticore and ht as well)
dactone 29th November 2010, 21:40 Quote
could someone work out how fast 7ghz is in mph?
Showerhead 29th November 2010, 22:20 Quote
7x10E9 x 45 x10E-9 = 315 m/s
(315 *602) = 1134000 m/h
1134000 / 1000 = 1134 km/h
(1134 / 8) * 5 = 708.75 MPH
roughly as conversion to mph isn't exact.

Not that there is any scientific basis for the above i just made it up.
salesman 29th November 2010, 22:22 Quote
Yes 7GHz is fast, but can it make the Kessel Run in less than twelve parsecs?
Altron 29th November 2010, 22:36 Quote
Quote:
Originally Posted by salesman
Yes 7GHz is fast, but can it make the Kessel Run in less than twelve parsecs?

It's so powerful that it makes units of distance become units of time.
bobwya 29th November 2010, 23:01 Quote
6.944GHz is not 7GHz. The sorry should be entitled 'AMD Phenom nearly hits 7GHz but fails'...
Dr. Strangelove 29th November 2010, 23:46 Quote
Quote:
Originally Posted by bobwya
6.944GHz is not 7GHz. The sorry should be entitled 'AMD Phenom nearly hits 7GHz but fails'...

Or... 'AMD Phenom hits 7,1GHz, although slightly unstable '

But I guess that might depend on which side of the fence you sit on ;-)
schmidtbag 30th November 2010, 02:43 Quote
what i don't get is how the 2nd highest overclock was another phenom II x4 at 6.5ghz, but why is it that i rarely hear about the chips reaching 4ghz on water cooling? and if i7 can reach 4.1ghz on air, then shouldn't it theoretically pass 7ghz when cooled with liquid nitrogen?
Vigilante 30th November 2010, 02:59 Quote
Quote:
Originally Posted by schmidtbag
what i don't get is how the 2nd highest overclock was another phenom II x4 at 6.5ghz, but why is it that i rarely hear about the chips reaching 4ghz on water cooling? and if i7 can reach 4.1ghz on air, then shouldn't it theoretically pass 7ghz when cooled with liquid nitrogen?

Intel's chips no longer have high clock speed ceilings, mainly due to their architecture. Intel learned its lesson with Netburst (which I believe they predicted would scale to 12ghz, and was therefore designed with low ipc but high clock speed in mind), whereas i7 and core based chips simply can't handle those speeds.

However, considering the current state of affairs, it's reasonable to presume that an i7 would not need to reach as high a speed to be competitive in terms of performance, so in reality it works itself out.
greigaitken 30th November 2010, 05:00 Quote
showerhead, never would have guessed 7ghz is almost speed of sound
Cthippo 30th November 2010, 07:21 Quote
"Slightly unstable"

That's better than most of the women I've dated. Too bad it has a heard of LN2.
dicobalt 30th November 2010, 10:44 Quote
It's nice to see an article acknowledge the fact that liquid nitrogen is impractical. If an overclock isn't capable of working 24/7 then it is meaningless to real users.

At any rate the importance of the Phenom II is at the end of the line. Bulldozer will determine the future. If Bulldozer overclocks to 5GHz on air and has a similar IPC to the i5/i7 then AMD will be back in the game.
Jipa 30th November 2010, 10:46 Quote
Quote:
Originally Posted by schmidtbag
what i don't get is how the 2nd highest overclock was another phenom II x4 at 6.5ghz, but why is it that i rarely hear about the chips reaching 4ghz on water cooling? and if i7 can reach 4.1ghz on air, then shouldn't it theoretically pass 7ghz when cooled with liquid nitrogen?

I've been running stable at 4 GHz on air coolers (with 965 and 970), so indeed I don't know why you haven't heard of 4 GHz on water..

Back to the topic: I hate when they run these records on processors that aren't even launched yet. For all I know there won't be AMD-launches this year, so they are atleast a month too early with the 975...
[USRF]Obiwan 30th November 2010, 13:56 Quote
Last night I put my watercooled amd on my balcony (its -3 outside). Normaly it idles around 21c inside. But after about 15minutes it was idling around 5c. Did not want to let it sit there to long I am afraid of condensation...
Hakuren 30th November 2010, 15:18 Quote
And the point of this supposedly great feat is?

LN2 cooling is as useful as snooze button on a smoke alarm.

I still don't get it why some people are so excited about few random numbers, when such "achievement" is purely academical and doomed to failure after test is over.
Vigilante 30th November 2010, 17:44 Quote
Quote:
Originally Posted by Hakuren
And the point of this supposedly great feat is?

LN2 cooling is as useful as snooze button on a smoke alarm.

I still don't get it why some people are so excited about few random numbers, when such "achievement" is purely academical and doomed to failure after test is over.

It is a testament to the architecture that it could actually scale to this speeds - though both impractical and in reality, not very useful. If AMD pull some insane IPC improvements out with Bulldozer (which, lets face it, they should be since its nearly 3 years overdue), and maintains this same level of clock speed scaling, we may actually have a few reasons to pick up an amd processor next year - other than the price, of course.
dactone 1st December 2010, 00:29 Quote
thanks for the math! 7ghz pretty fast then.
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