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20th November 2008, 20:35 | #1 |
Madshrimp Join Date: May 2002 Location: 7090/Belgium
Posts: 79,024
| 6GHz Phenom II Overclock on LN2, 5Ghz on Dry Ice As we all know, the Phenom II will be AMD's second 45 nm part (the first is officially the Shanghai server part) that is scheduled to hit Q1 09. This heavily redesigned processor based on the Phenom architecture has already showed some significant per clock performance gains over the older Barcelona product, and AMD considers this to be their best design ever in terms of performance, functionality, and eventual clockspeed. The first desktop products are expected to hit 3 GHz at the top end, but AMD has been hinting that the Phenom IIs can do a lot more in the hands of an enthusiast. The first leaks were that the Phenom II could hit 4 GHz on air cooling alone, though we obviously wonder how extreme that air cooling is. Well today AMD had some actual demonstrations at their gathering, and the Phenom II was able to hit 5 GHz at 1.6v by using dry ice cooling. Dry ice is CO2, and it goes directly from solid to gas (sublimation) at a temperature of -109.3 F (-78.5C for the rest of the world) at 1 atmosphere. So with some pretty extreme cooling (non-LN) the Phenom II does show that it has some legs in the clockspeed department. http://www.pcper.com/comments.php?nid=6455
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20th November 2008, 22:21 | #2 |
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| Heavily redesigned? Ah, come on... This reminds me of the 3Ghz Phenom AMD showed some many months ago, unfortunately it got lost somewhere on the way. 4Ghz shouldn't be a problem for the second version, I guess. |
20th November 2008, 22:47 | #3 |
[M] Reviewer Join Date: Nov 2004 Location: Waregem
Posts: 6,466
| The biggest problem is not the actual frequency (which is quite unbelievable as well, seeing 4GHz is still nearly impossible), but the scaling with temperatures. AMD's production process makes it close to impossible to run your cpu close to -50°C, let alone -150°C. |
20th November 2008, 23:57 | #4 |
[M] Reviewer Join Date: Nov 2004
Posts: 4,127
| High-K, or what they don't have |
21st November 2008, 00:39 | #5 |
[M] Reviewer Join Date: Nov 2004 Location: Waregem
Posts: 6,466
| Amd uses SOI, Intel uses High-K. |
21st November 2008, 03:33 | #6 |
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21st November 2008, 04:20 | #7 |
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| I sure am glad that all of you people saying this didn't happen were there to see it and everything. |
21st November 2008, 09:12 | #8 |
[M] Reviewer Join Date: Nov 2004 Location: Waregem
Posts: 6,466
| Well, apparently it IS true. Tony confirms the speeds and apparently Macci was controling the setup to, indeed, -196°C ... no coldbug :-O. Apparently it's CPC as fast as the i7 as well AMD back in the game? |
21st November 2008, 15:14 | #9 |
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| "Cameras weren't allowed at the event, and so no clear pictures were taken..." Then I guess they could have taken it to 7Ghz s well... |
21st November 2008, 15:25 | #10 | |
Posts: n/a
| Quote:
Pure performance, no. Factoring in price, sure. It required 1.9v to reach ~6GHz. That's supposedly better than Nehalem, which is neat. But for the 99.9% of users that don't use LN2 or dry ice, I'm waiting to see what typical overclocks are. If 1.6V for 4GHz holds true then it is no better than Nehalem. AMD would still be playing the cost/performance game. | |
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