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AMD to allow per-core overclocking for Phenom?
AMD to allow per-core overclocking for Phenom? - The Tech Report
"There will be a twist, though: a screenshot posted by the site suggests the new Overdrive will enable discrete overclocking for each of a Phenom X4 processor's four cores. In the screenshot, a chip is running with multipliers of 11X, 12X, 12.5X, and 11.5X for its four cores, achieving respective speeds of 2.93GHz, 3.2GHz, 3.33GHz, and 3.07GHz." http://techreport.com/discussions.x/13511 |
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AMD to allow per-core overclocking for Phenom?
On Thu, 01 Nov 2007 09:26:59 -0700, YKhan wrote:
AMD to allow per-core overclocking for Phenom? - The Tech Report "There will be a twist, though: a screenshot posted by the site suggests the new Overdrive will enable discrete overclocking for each of a Phenom X4 processor's four cores. In the screenshot, a chip is running with multipliers of 11X, 12X, 12.5X, and 11.5X for its four cores, achieving respective speeds of 2.93GHz, 3.2GHz, 3.33GHz, and 3.07GHz." http://techreport.com/discussions.x/13511 What would be the L3 speed then? I'm assuming it runs at full CPU clock under normal conditions, but if the cores run each at its own clock speed, there would be no such thing as "CPU clock", unless we take the average. I'm afraid the average is not much more meaningful than average patient temperature in a hospital - go average infectious ward with the morgue, and the result may just be close to the norm :-) Does it synchronize then to the fastest, or the slowest, or just runs at stock speed? Can it run asynchronously from the cores? If yes, wouldn't there be a performance hit that takes away all the advantages of overclocking each core to its limits and then some? Too many questions, and not that much in terms of possible advantages. All this is aside from the usual official stance of chip makers that does not condone running the chip outside of the spec - unless there was a change of heart that I didn't notice. As for the photo...well, Photoshop can produce amazing results in skilled hands. NNN |
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AMD to allow per-core overclocking for Phenom?
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AMD to allow per-core overclocking for Phenom?
In comp.sys.intel krw wrote:
As long as the manufacturer does it, it's not "over clocking". ;-) This allows them to run each core at its maximum, rather than that of the slowest. I'm sure the CPU schedulers would _love_ that rick jones -- a wide gulf separates "what if" from "if only" these opinions are mine, all mine; HP might not want them anyway... feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH... |
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AMD to allow per-core overclocking for Phenom?
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AMD to allow per-core overclocking for Phenom?
YKhan wrote:
AMD to allow per-core overclocking for Phenom? - The Tech Report "There will be a twist, though: a screenshot posted by the site suggests the new Overdrive will enable discrete overclocking for each of a Phenom X4 processor's four cores. In the screenshot, a chip is running with multipliers of 11X, 12X, 12.5X, and 11.5X for its four cores, achieving respective speeds of 2.93GHz, 3.2GHz, 3.33GHz, and 3.07GHz." http://techreport.com/discussions.x/13511 Not really new, Intel Core2 allows the cores to run at different speeds AFAIK, the /proc/cupinfo shows varying speeds under light load, moving all to full speed under heavy load. The newest Intel CPUs, Penryn tech, seem to have the ability to o/c a single core under light load, on the theory that overall power use will stay within design limits, and single thread performance will be better. Since I've only seen this mentioned for the "extreme" CPU, I can't guess if it will also be on something the average person might buy. -- Bill Davidsen He was a full-time professional cat, not some moonlighting ferret or weasel. He knew about these things. |
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