Does Leopard really support dual core?

[yaleyu]

Model: Dell 640m

CPU: Pentium Dual Core T2080

Memory: 2G DDR 667

HDD: 80G SATA

OS: Leopard 9A581

 

I never thought it's slow even it's slower than XP on same machine, but today I compared it with my colleague's 2 years old Mac G4, I feel it's so slow. Apart from difference between Power PC and PC, it still surprised me, I googled something, noticed somewhere mentioned single core and dual core, then I disabled 1 core in BIOS, speed is increased dramatically!!!

 

Does Leopard really support dual core CPU? Anyone try this and feedback here is appreciated.

[Purple Puppy]

In my Leopard (ToH), one of the cores of my Intel Core 2 Duo is disabled... still haven't found out why.

[e-rick]

It is supported. brazilmac gm.

Tested with cinebench.. it does the same test using one core and using both cores.. test results differed by a factor 1.8..

[yaleyu]

It is supported. brazilmac gm.

Tested with cinebench.. it does the same test using one core and using both cores.. test results differed by a factor 1.8..

 

I'm using BrazilMac, I didn't use such professional benchmark test software, just tried some simple action, like typing in terminal, sliding picture in finder. The difference is big.

 

Do you mean single core:dual core=1:1.8 with cinebench?

[yaleyu]

Update:

 

1. Put idlehalt=0 in boot.plist, enable dual core in BIOS=slow, disable dual core in BIOS=normal

2. Put idlehalt=0 cpus=1 in boot.plist, enable dual core in BIOS=normal but in System Profiler CPU=0, CORE=1

[NeSuKuN]

Take into account that leox86 kernels aren't as tested and polished as tiger's, a performance issues in such specific circumstances is expectable. I mean, if you can't make it work well today, have patience, maybe when a new leo kernel appears you'll obtain the performance you want.

[yaleyu]

Take into account that leox86 kernels aren't as tested and polished as tiger's, a performance issues in such specific circumstances is expectable. I mean, if you can't make it work well today, have patience, maybe when a new leo kernel appears you'll obtain the performance you want.

 

Great! Thanks, I'll wait. I saw in another thread that Dell laptop always has some problem.

[e-rick]

Yes i meant a 1:1.8 performance difference between single and dual.

Which kernel are you using by the way?

[yaleyu]

Yes i meant a 1:1.8 performance difference between single and dual.

Which kernel are you using by the way?

 

Kernel is 10.5 9A581 from BrazilMac, I'm not sure will ToH version be better?