Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
TarraTarra!
User Rank
Author
Power and frequency not scaling
TarraTarra!   9/10/2014 2:02:16 PM
NO RATINGS
What was interesting here was that the turbo feature has two frequencies - one with AVX instructions and the other without. When running AVX instructions the frequency drops to 1.9GHz. Without AVX instructions it is 2.3GHz. This goes to say how carefully Intel has had to pack these cores into that power budget. In certain applications the previous IvyBridge 10core and 12core parts have higher performances as they can clock higher.

 

This has been underwhelming to say the least.

TarraTarra!
User Rank
Author
Re: 18?
TarraTarra!   9/10/2014 1:54:37 PM
NO RATINGS
@colin is right. Intel went with a ring based interconnect from sandybridge and that makes it easier to come up with odd number of cores. I am sure 18 was as far as they could push the core count without blowng up the socket power budget. The part is rated at 145W but apparently burns close to 165W in reality.

krisi
User Rank
Author
Re: 18?
krisi   9/10/2014 1:21:33 PM
NO RATINGS
thank you Colin

R_Colin_Johnson
User Rank
Author
Re: 18?
R_Colin_Johnson   9/10/2014 1:18:25 PM
NO RATINGS
It seems that 18 was chosen because the layout allowed it. Here is what Intel's chief architect says: "The internal micro-architecture is not constrained to a power-of two. Implementing the layout as four columns (three with four cores and the fourth with six cores) allowed us to efficiently use the available silicon area and provide the maximum number of cores. "

krisi
User Rank
Author
18?
krisi   9/9/2014 2:59:17 PM
NO RATINGS
18 cores? such a strange number...I thought it should be multiple of 2, say 16...any explanation?



Radio
NEXT UPCOMING BROADCAST

Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.

Brought to you by

July 16, 1pm EDT Thursday
IoT Network Shoot Out
Top Comments of the Week
Flash Poll
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Special Video Section
LED lighting is an important feature in today’s and future ...
Active balancing of series connected battery stacks exists ...
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...