I've been doing some tests with a Pentium 4 3.0Ghz, an Atom N270 and an Atom A330.
Originally, I thought the Atom A330 would be about equal to the Pentium 4 because it has two cores which are about half as fast each.. but it turns out that things aren't that simple..
Pentium 4 3.0Ghz:
1 Core / 2 Thread - 0.50 (Cinebench 11.5)
Atom N270 1.6Ghz:
1 Core / 2 Threads - 0.25 (Cinebench 11.5)
140 seconds (wPrime 32M)
Atom A330 1.6Ghz:
2 Core / 2 Thread - 0.25 (Cinebench 11.5)
104 seconds (wPrime 32M)
2 Core / 4 Thread - 0.50 (Cinebench 11.5)
70 seconds (wPrime 32M)
Now the P4 vs N270 makes perfect sense to me. Twice the speed, twice the points.
But the A330.. totally hairy.
From the wPrime 32M results, we can determine that a thread is 40-50% as powerful as a real core, in HyperThreading.
(70 is ~43% less than 104, 104 is ~47% less than 140).
So, if you bear with me..
Atom N270:
A. 1 (0.125) + 2 (0.0625) = 0.25
Atom A330:
B. 2 (0.125) + 2 (0.0625) = 0.31
C. 2 (0.125) + 4 (0.0625) = 0.43
So, why do I get 0.25 for 'B' and 0.50 for 'C'?
Totally odd.
Originally, I thought the Atom A330 would be about equal to the Pentium 4 because it has two cores which are about half as fast each.. but it turns out that things aren't that simple..
Pentium 4 3.0Ghz:
1 Core / 2 Thread - 0.50 (Cinebench 11.5)
Atom N270 1.6Ghz:
1 Core / 2 Threads - 0.25 (Cinebench 11.5)
140 seconds (wPrime 32M)
Atom A330 1.6Ghz:
2 Core / 2 Thread - 0.25 (Cinebench 11.5)
104 seconds (wPrime 32M)
2 Core / 4 Thread - 0.50 (Cinebench 11.5)
70 seconds (wPrime 32M)
Now the P4 vs N270 makes perfect sense to me. Twice the speed, twice the points.
But the A330.. totally hairy.
From the wPrime 32M results, we can determine that a thread is 40-50% as powerful as a real core, in HyperThreading.
(70 is ~43% less than 104, 104 is ~47% less than 140).
So, if you bear with me..
Atom N270:
A. 1 (0.125) + 2 (0.0625) = 0.25
Atom A330:
B. 2 (0.125) + 2 (0.0625) = 0.31
C. 2 (0.125) + 4 (0.0625) = 0.43
So, why do I get 0.25 for 'B' and 0.50 for 'C'?
Totally odd.