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Old 2006-05-28, 07:53   #1
drew
 
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Default Intel Core Duo processor

I'm getting a new computer at work...it's a laptop and it's going to have a 2.0 GHz Intel Core Duo processor, and I'm looking forward to seeing how it performs with Prime95.

I'm wondering one thing, though. I visited Intel's site to see a bit more about it, and it mentions the following:

"And thanks to the innovative energy efficient technologies built-in, the Intel® Core™ Duo processor is able to transfer power only to those areas of the processor that need it, thereby enabling laptops to save power and desktops to have thinner, sleeker designs."

I'm wondering what that will mean for Prime95. Is it so well optimized that it will use a large percentage of the cores capability, or should this technology allow the computer to run much cooler. My fear is that the laptop's cooling system is sized for inefficient processor utilization. Any opinions?

Thanks,
Drew
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Old 2006-05-28, 14:40   #2
Prime95
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That CPU isn't very good, see http://mersenne.org/bench.htm

I think the innovative features you read about are for the upcoming Conroe processor - Core 2 Duo (or is it Core Duo 2).
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Old 2006-05-28, 15:58   #3
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Core Duo
32 bit codenamed Yonah used in intel Apple notebooks.

Core 2 Duo
64 and 32 bit codenamed Conroe (desktop), Merom (notebook)
to be released this summer, many improvements over the previous
generation Core, added: 64 bit, virtualization, improved floating and integer units,
4 issue versus 3, L1 caches transfer data,bigger L2 cache,
higher FSB, higher performance.

The Core Duo is a follow up to the Pentium M, in retrospect the Pentium M
could be viewed as Core 0, the Yonah as Core 1, and the upcoming processors as Core 2.

The Duo (and Solo) refer to the number of CPU cores in the chip, Duo = 2
Solo = 1 (and perhaps Quad or Quadro or Quattro for 4 early next year).
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Old 2006-05-28, 16:52   #4
drew
 
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Quote:
Originally Posted by Prime95
That CPU isn't very good, see http://mersenne.org/bench.htm

I think the innovative features you read about are for the upcoming Conroe processor - Core 2 Duo (or is it Core Duo 2).
Oh wow! I didn't know there were more Intel chips at the bottom of that list. It appears the Duo still does better than the Pentium M, clock for clock. I'm running a Pentium M right now, so that should definitely be an improvement.

Am I right to assume I can also get nearly twice the throughput by utilizing both cores (unlike the multithreaded machine which only improves by about 4 or 5%)?
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Old 2006-05-28, 18:06   #5
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Running two instances of Prime95, each working on a different number
will give nearly twice the throughput of a single one.

The main issue is memory access/bandwidth with both cores there is some
contention for memory which is why it isn't just twice the throughput.

Each core is a full CPU, not just duplicated registers and some
extra circuitry as in the HyperThreaded CPUs.
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Old 2006-05-29, 07:00   #6
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I am using the Core Duo for trial factoring where it seems to perform better than at DC/LL
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