With Beamsync enabled I had a result of 75

With Beamsync disabled much better:

Results 98.58
System Info
Xbench Version 1.2
System Version 10.4.6 (8I1119)
Physical RAM 1024 MB
Model ADP2,1
Drive Type Maxtor 6L250R0
CPU Test 60.99
GCD Loop 81.30 4.29 Mops/sec
Floating Point Basic 69.93 1.66 Gflop/sec
vecLib FFT 45.90 1.51 Gflop/sec
Floating Point Library 58.16 10.13 Mops/sec
Thread Test 149.45
Computation 136.28 2.76 Mops/sec, 4 threads
Lock Contention 165.42 7.12 Mlocks/sec, 4 threads
Memory Test 84.15
System 72.69
Allocate 61.17 224.64 Kalloc/sec
Fill 91.10 4429.27 MB/sec
Copy 71.71 1481.19 MB/sec
Stream 99.91
Copy 98.38 2032.00 MB/sec
Scale 98.45 2033.94 MB/sec
Add 102.00 2172.82 MB/sec
Triad 100.89 2158.28 MB/sec
Quartz Graphics Test 89.26
Line 89.57 5.96 Klines/sec [50% alpha]
Rectangle 83.99 25.08 Krects/sec [50% alpha]
Circle 83.97 6.84 Kcircles/sec [50% alpha]
Bezier 90.34 2.28 Kbeziers/sec [50% alpha]
Text 100.29 6.27 Kchars/sec
OpenGL Graphics Test 177.18
Spinning Squares 177.18 224.76 frames/sec
User Interface Test 139.16
Elements 139.16 638.65 refresh/sec
Disk Test 83.30
Sequential 75.21
Uncached Write 39.85 24.47 MB/sec [4K blocks]
Uncached Write 116.86 66.12 MB/sec [256K blocks]
Uncached Read 92.53 27.08 MB/sec [4K blocks]
Uncached Read 114.67 57.63 MB/sec [256K blocks]
Random 93.33
Uncached Write 72.96 7.72 MB/sec [4K blocks]
Uncached Write 98.66 31.58 MB/sec [256K blocks]
Uncached Read 95.76 0.68 MB/sec [4K blocks]
Uncached Read 116.64 21.64 MB/sec [256K blocks]