Linked by David Adams on Wed 4th Aug 2010 18:28 UTC, submitted by estherschindler
Hardware, Embedded Systems Anyone contemplating a new computer purchase (for personal use or business) is confronted with new (and confusing) hardware choices. Intel and AMD have done their best to differentiate the x86 architecture as much as possible while retaining compatibility between the two CPUs, but the differences between the two are growing. One key differentiator is hyperthreading; Intel does it, AMD does not. This article explains what that really means, with particular attention to the way different server OSes take advantage (or don't). Plenty of meaty tech stuff.
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Two dual core vs one quad core?
by Kebabbert on Thu 5th Aug 2010 11:19 UTC
Kebabbert
Member since:
2007-07-27

So, what are the disadvantages of
A) two dual core cpus
B) one quad core cpu?

(I use OpenSolaris which handles threads and many cores extremely well. I do not game on this computer.)

Reply Score: 2

Brendan Member since:
2005-11-16

Hi,

So, what are the disadvantages of
A) two dual core cpus
B) one quad core cpu?


Which CPUs? How much heat do they generate? Which caches are shared between cores? Would "two dual core CPUs" be ccNUMA (e.g. Opteron)? If it is ccNUMA does that mean you get 2 memory controllers and twice as much RAM bandwidth? What software would it run - is the software effected by caching and/or memory bandwidth (or just raw processing speed)? Does the software optimise memory allocation for ccNUMA?

What about prices (dual-socket motherboards are typically more expensive)?

-Brendan

Reply Parent Score: 3

Kivada Member since:
2010-07-07

Latency, with 2 CPU sockets sharing info from socket to socket the data must be transmitted over the FSB. The same thing happens with the Intel Core 2 Quads as there are 2 dual core CPUs set in the same CPU die, giving you a dual socket solution in a single socket.

Now all AMD quads and the Intel i series quads are real quads, the cores are able to talk to one another directly without having to transmit the data over the FSB.

Reply Parent Score: 1