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Faster CPU - Old or New?

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Last response: in Components
October 2, 2011 12:00:46 AM

Hi there

I have a choice of machines (again) 2002 vs NEW:

4 X Northwood XEON 3.0GHZ HT with 4MB L3 cache per CPU
So 8 threads at 3GHZ....
and fast 10K RPM Disks and 8GB


A cheap 4GB 2.0GHZ Dual Core (not sure of model) Workstation ($150 used)

I am doing FFT math (very numerically intensive) multi-threaded in gcc

Which one would be faster?? Size is not an issue nor noise or power here. The old Server consumes around 240W and is quiet...

Many thanks.

More about : faster cpu

a c 257 à CPUs
October 2, 2011 12:07:39 AM

Definitely find out what model the dual core in the workstation is, if it is a much newer chip it may be much faster than a quad core northwood would be. If its only a core 2 duo is going to be less impressive than an i3 2100 would be.

I would also suggest finding out how many threads the app you are using can run, if it is only running 2 or 3 then the hyperthreading on the Xeon isnt going to help at all.
October 2, 2011 12:46:34 AM

Well normally quad is better then dual like 4 is better then 2 right? common scene.

But like Hunter said check it out because some times the smaller one is the better one like the hair and the turtle and plus 90% of newer cpu's are a lot faster then the older generation :) 

October 2, 2011 12:58:57 AM

Many thanks.

I'll look into the Newer Dual Core and report back.

But the older system has *8* of these reported from x86info (4 Physical CPU in machine):

Family: 15 Model: 2 Stepping: 6 Type: 0 Brand: 12
CPU Model: Pentium 4 (Northwood) [C0] Original OEM
Processor name string: Intel(R) Xeon(TM) MP CPU 3.00GHz

Feature flags:
fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflsh ds acpi mmx fxsr sse sse2 ss ht tm pbe cntx-id xTPR
Extended feature flags:

Cache info
Instruction trace cache: 12K uOps, 8-way associative.
L1 Data cache: 8KB, sectored, 4-way associative. 64 byte line size.
L2 unified cache: 512KB, sectored, 8-way associative. 64 byte line size.
L3 unified cache: 4MB, 8-way associative. 64 byte line size.
TLB info
Instruction TLB: 4K, 2MB or 4MB pages, fully associative, 64 entries.
Data TLB: 4KB or 4MB pages, fully associative, 64 entries.
The physical package supports 2 logical processors

Thanks guys!