Linked by Thom Holwerda on Thu 27th Oct 2005 10:56 UTC, submitted by Matty
Apple There appears to be no performance penalty for using dual-core processors instead of two single-core processors with the same clock speed, Macworld Lab has concluded after preliminary testing of the dual-core Power Mac G5s released by Apple a week ago.
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spin?
by nimble on Thu 27th Oct 2005 14:52 UTC
nimble
Member since:
2005-07-06

Pointless headline.

Equal performance compared to two equally-clocked single cores is the least one would expect from a proper dual-core. If anything it should perform better due to shared cache and faster communication between the two cores.

Reply Score: 1

v RE: spin?
by Tom K on Thu 27th Oct 2005 15:49 UTC in reply to "spin?"
v RE: spin?
by Tom K on Fri 28th Oct 2005 03:16 UTC in reply to "spin?"
Okay Article
by Anonymous on Thu 27th Oct 2005 14:58 UTC
Anonymous
Member since:
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Unless the processors share the same memory buss. Then on some tests it should (or could) run slower. Granted it is not the perfect article, but it does at least show that the Apple architechure is sound.

Reply Score: 0

I want to see this in a iMac
by Anonymous on Thu 27th Oct 2005 16:21 UTC
Anonymous
Member since:
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I want a duel core iMac.

Question, are these new powermacs still water cooled?

thank, ken

Reply Score: 0

RE: I want to see this in a iMac
by Jody on Thu 27th Oct 2005 17:20 UTC in reply to "I want to see this in a iMac"
Jody Member since:
2005-06-30

I want a duel core iMac

Isn't that a little bit overkill for a monitor with a built in computer?

[/sarcasm]

Reply Score: 1

Only the Quad is water-cooled
by Anonymous on Thu 27th Oct 2005 16:26 UTC
Anonymous
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The 2.0GHz and 2.3GHz dual are air cooled, the Quad 2.5GHz is still water-cooled. I don't expect they'll ever be a dual-core G5 iMac. iMac will go dual core when it moves to Intel some time in 2006.

Reply Score: 0

RE[2]: I want to see this in a iMac
by Thom_Holwerda on Thu 27th Oct 2005 17:22 UTC
Thom_Holwerda
Member since:
2005-06-29

I want a duel core iMac

Okay, can't resist, you are warned: I'd much prefer a du<u>a</u>l core iMac.

Reply Score: 5

Johan Member since:
2005-06-30

and i'd much prefer people preview their posts to check their tags, but we can't all have what we prefer can we ?:-)

Reply Score: 3

QuadMacMan
by Anonymous on Thu 27th Oct 2005 17:55 UTC
Anonymous
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Some tests done using Luxolgy's Moto

We had the opportunity to try one of the new quad G5s with modo 201 and I must say I was impressed with its speed. As an example, it rendered the global illumination test image shown above in 17 seconds flat. The scene includes 244,000 polygons with 8 sample antialiasing and 200 indirect rays. Brad's dual 2.5 G5 takes 38 seconds to render the same scene, so it looks like the new machines can render over twice as fast.

I just tried this scene on my home Dell 530 workstation, and I'm afraid it was beaten by both Macs. Here are the results so far:

dual 2.8 Xeon: 49 seconds
dual 2.5 G5: 38 seconds
quad 2.5 G5: 17 seconds

Admittedly my PC is getting old, but still I don't know if we have anything that can beat the quad G5. Obviously it has more improvements than just the number of cores since the speedup is greater than a factor of two.


http://forums.luxology.com/discussion/topic.aspx?id=3717

Reply Score: 1

RE: QuadMacMan
by Anonymous on Thu 27th Oct 2005 20:01 UTC in reply to "QuadMacMan"
Anonymous Member since:
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I bet a top of the line quad Opteron would be pretty close. Probably more expensive though.

Reply Score: 0

RE[2]: QuadMacMan
by Anonymous on Thu 27th Oct 2005 22:50 UTC in reply to "RE: QuadMacMan"
Anonymous Member since:
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one don't need quad AMD, Dual Opteron destroyed latest MAC.
and here why BOXX is more expensive:
http://www.digitalvideoediting.com/articles/viewarticle.jsp?id=3295...

in most benchmarks dual Opteron is 60-100% faster than Power Mac G5 dual 2.75
Opteron aslo is faster in Night Flight that favors some options in MAC

Reply Score: 0

RE[3]: QuadMacMan
by smitty on Thu 27th Oct 2005 23:02 UTC in reply to "RE[2]: QuadMacMan"
smitty Member since:
2005-10-13

I'm thinking a quad mac would still beat out a dual opteron in most highly threaded tests. But you're right, it probably would be close. I missed out on how slow that Xeon was (only 2.8GHz)

Reply Score: 1

RE[3]: QuadMacMan
by Anonymous on Fri 28th Oct 2005 00:04 UTC in reply to "RE[2]: QuadMacMan"
Anonymous Member since:
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OMG it totally destroyed the MAC!!! ON PC OPTIMIZED APPLICATIONS!!


BUT, BUTT NIGHT FLIGHT FAVORS MAC!


The only problem dumbass is that Mac users don't use After Affects for content creation. It's a joke like Adobe. That sh*t isn't even close to being optimized on the Apple platform as it is for WinTel. So all these test prove jack spit. Lets test this suck out with Final Cut Pro Motion.....OOOooppsss

Reply Score: 0

RE[3]: QuadMacMan
by rayiner on Fri 28th Oct 2005 01:28 UTC in reply to "RE[2]: QuadMacMan"
rayiner Member since:
2005-07-06

Did you even read the article before posting? The BOXX is a dual Opteron 275. The Opteron 275 is a fricking dual-core CPU. You've basically posted a benchmark showing that a quad core Opteron is 60-100% faster than a dual CPU G5. Well *duh*! Indeed, the benchmarks suggest that a quad G5 would hang quite well with the quad Opteron, given apps that demonstrated 60%+ SMP scaling with twice the cores!

Reply Score: 2

RE[3]: QuadMacMan
by JLF65 on Fri 28th Oct 2005 01:34 UTC in reply to "RE[2]: QuadMacMan"
JLF65 Member since:
2005-07-06

You're an idiot. You're looking at a benchmark comparing dual dual-core Opterons to plain dual G5 Macs. How about comparing to dual dual-core G5? Maybe then it would be a fair comparison. As it is, it's comparing apples and oranges.

Reply Score: 1

RE[4]: QuadMacMan
by Anonymous on Fri 28th Oct 2005 11:25 UTC in reply to "RE[3]: QuadMacMan"
Anonymous Member since:
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first post about QuadMacMan provided link
have you read it?
I bet you havent. So read it. this is the excerpt from third page:
"Excuse me, but the new Mac is not "pricey". I did some research and this deserves a look:

I did some workstation pricing comparisons. For a "comparable" system to the Mac Quad with FX 4500 I got these approximate prices all configured with Dual AMD 280 (2.4Ghz, Dual Core) cpus, minimum system Ram (400Mhz DDR2 SDRAM), a 250GB SATA-150 system drive, a PC-style "Superdrive", no wireless, no optical audio.

HP xW 9300 w/2GB ECC DDR-400 Ram $9249

BOXX 7400 w/1GB ECC DDR-400 Ram $6869

Alienware 7550a w/1GB ECC DDR-400 Ram $6420

Apple Quad w/1GB non-ECC DDR2-533 $5148 including shipping"

So "idiot" was some MAC user comparing machines and prices.

I only explained (providing link to the benchmark page)
That BOXX7400 is more expensive, but weay faster (including test Apple was using to show how dual core beats crap out single 3.6 intel (and this was obviously o.k.)

Reply Score: 0

RE[5]: QuadMacMan
by rayiner on Fri 28th Oct 2005 22:16 UTC in reply to "RE[4]: QuadMacMan"
rayiner Member since:
2005-07-06

That BOXX7400 is more expensive, but weay faster

That benchmark wasn't comparing the BOXX7400 to a Mac Quad. It was comparing it to a dual-processor Mac.

Reply Score: 1

RE[6]: QuadMacMan
by Anonymous on Sat 29th Oct 2005 17:58 UTC in reply to "RE[5]: QuadMacMan"
Anonymous Member since:
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And according to this:
http://www.macworld.com/news/2005/10/25/dualcorebenchmarks/index.ph...
there is not much difference between dual-core and dual-procesor. Or Is it?
They are actually happy that dua-core perform as well as dual-processor.
Dual-core or dual-processor, G5 is still slower than Boxx7400

By the way MacWorld is using adobe products for testing too.

Reply Score: 0

dual-core
by Anonymous on Thu 27th Oct 2005 18:03 UTC
Anonymous
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According to the benchmark the 2.3GHz outperforms the 2.5GHz in almost every test,so why should one buy a dual core 2.5GHZ instead off a dual core 2.3GHZ one might ask?

Evenso the 2.7GHz outperforms both the two dual cores,so what's the benefit of the two?

Reply Score: 0

RE: dual-core
by Ralf. on Thu 27th Oct 2005 18:12 UTC in reply to "dual-core"
Ralf. Member since:
2005-08-13

Please tell me where a 2.5GHz dual core is mentioned in the test. The don't exist - so read carefully before you write.

Reply Score: 1

RE: I want to see this in a iMac
by godawful on Thu 27th Oct 2005 19:30 UTC
godawful
Member since:
2005-06-29

only the dual dual-core is

Reply Score: 1

Macs moving to intel !!
by Anonymous on Fri 28th Oct 2005 18:46 UTC
Anonymous
Member since:
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What the hell are you talking about? Apple will never switch to Intel.

They are much slower than the G4s & G5s.

Reply Score: 0