iMac Revision B. speedtests

Trout74 said:

anyone done them yet? How do they compare to the old Rev A. iMac's and the 2.0GHZ powermacs?

I checked barefeats already

trout

Click to expand...

What utilities are used? I'll bench mine tonight and post the results.

Adam

monty77 said:

What utilities are used? I'll bench mine tonight and post the results.

Adam

Click to expand...

Not sure but maybe Cinebench

The Xbench website has some of the new iMacs.

http://ladd.dyndns.org/xbench/ -> iMac (Flat Panel)
click on the Processor column header to get the new 2GHz machines at the top.

One thing I've noticed is that all but one of the 2GHz iMacs has significantly slower memory transfer speeds than all of the rev a iMacs that I checked. The one faster one was Necessary's iMac G5 20". Could be 1x1GB ram vs. 2x512MB ram.

Just ran XBench on mine:

http://ladd.dyndns.org/xbench/merge.xhtml?doc1=111149&unsetCookie=true

Adam

monty77 said:

Just ran XBench on mine:

http://ladd.dyndns.org/xbench/merge.xhtml?doc1=111149&unsetCookie=true

Adam

Click to expand...

Nice. More evidence that having matched dimms has a measurable increase in performance. Whether or not it's noticable is up for debate, though.

Some nice improvements over my Rev A iMac 20", getting the Rev B next week . Especially on the Open Gl stats
Results 157.21
System Info
Xbench Version 1.1.3
System Version 10.4 (8A428)
Physical RAM 1024 MB
Model PowerMac8,1
Processor PowerPC G5 @ 1.80 GHz
L1 Cache 64K (instruction), 32K (data)
L2 Cache 512K @ 1.15 GHz
Bus Frequency 600 MHz
Video Card GeForce FX 5200
Drive Type ST3160023AS


CPU Test 169.32
GCD Loop 102.29 3.99 Mops/sec
Floating Point Basic 284.12 1.03 Gflop/sec
AltiVec Basic 121.81 3.54 Gflop/sec
vecLib FFT 195.96 3.04 Gflop/sec
Floating Point Library 342.39 13.70 Mops/sec

Thread Test 98.92
Computation 68.17 920.32 Kops/sec, 4 threads
Lock Contention 180.20 2.26 Mlocks/sec, 4 threads

Memory Test 242.91
System 289.02
Allocate 527.54 344.11 Kalloc/sec
Fill 374.88 2984.08 MB/sec
Copy 171.92 859.60 MB/sec
Stream 209.48
Copy 184.82 1351.01 MB/sec [G5]
Scale 182.05 1343.52 MB/sec [G5]
Add 237.51 1520.09 MB/sec [G5]
Triad 251.22 1534.96 MB/sec [G5]

Quartz Graphics Test 206.75
Line 176.28 4.49 Klines/sec [50% alpha]
Rectangle 162.24 11.41 Krects/sec [50% alpha]
Circle 187.59 4.32 Kcircles/sec [50% alpha]
Bezier 192.81 2.10 Kbeziers/sec [50% alpha]
Text 546.53 8.91 Kchars/sec

OpenGL Graphics Test 174.64
Spinning Squares 174.64 122.21 frames/sec
User Interface Test 309.84
Elements 309.84 99.66 refresh/sec

Disk Test 94.29
Sequential 87.54
Uncached Write 87.27 36.38 MB/sec [4K blocks]
Uncached Write 64.69 26.49 MB/sec [256K blocks]
Uncached Read 90.95 14.40 MB/sec [4K blocks]
Uncached Read 128.51 51.92 MB/sec [256K blocks]
Random 102.17
Uncached Write 96.12 1.44 MB/sec [4K blocks]
Uncached Write 102.36 23.09 MB/sec [256K blocks]
Uncached Read 95.98 0.63 MB/sec [4K blocks]
Uncached Read 116.83 24.04 MB/sec [256K blocks]

Quartz 2D Extreme Rocks!

Obviously, the Rev. B iMac 2.0 GHz test I looked over didn't have Quartz 2D Extreme enabled. My Rev. A 1.8 GHz iMac performed MUCH better on the Quartz test (and has a much weaker graphics card).

I truly didn't realize how big of a difference Quartz 2D Extreme made until now. Impressive. I'm also impressed that a 200 MHz (66 MHz FSB) higher clock speed would make such a marked improvement in CPU scores.

The Rev. B appears to be a real winner. It's kind of sad knowing that my Rev. A isn't the fastest on the block anymore, but I don't feel compelled in any way to go out and purchase the latest and greatest. My G5 is no slower today than it was before the Rev. B's came out. It's a G5...it's still blazing fast!