Timings Comparison
Timings for methanol
Single point Energy calculations
Typical GAUSSIAN input:
%mem=24000000
#HF/6-31G* scf=tight
test of times on various machines
0 1
C
O 1 rco
H 2 roh 1 aoh
H 1 rh1 2 ach1 3 180.0
H 1 rh2 2 ach2 4 d2
H 1 rh2 2 ach2 4 -d2
rco 1.4
roh 0.95
rh1 1.081
rh2 1.087
aoh 109.5
ach1 107.2
ach2 112.1
d2 120.0
Times are wall-clock seconds for job to run.
Gaussian 98 (IBM-RS6000-G98RevA.4) was used
on a dedicated IBM RS6000/397 (AIX Version 4.2.1)
with 1GB memory.
Level |
6-31G* |
6-311+G** |
cc-pVDZ |
aug-cc-pVDZ |
cc-pVTZ |
aug-cc-pVTZ |
HF |
12 |
16 |
14 |
26 |
277 |
1335 |
BLYP |
26 |
55 |
36 |
82 |
283 |
1189 |
B3LYP |
27 |
54 |
35 |
83 |
325 |
1402 |
B3PW91 |
28 |
55 |
36 |
86 |
316 |
1404 |
MP2FC |
14 |
23 |
19 |
42 |
340 |
1717 |
MP2FU |
14 |
23 |
18 |
43 |
346 |
1750 |
MP4FC |
23 |
104 |
41 |
209 |
946 |
5278 |
CID |
15 |
49 |
24 |
101 |
843 |
6222 |
CISD |
17 |
57 |
27 |
119 |
876 |
6458 |
CCD |
18 |
60 |
28 |
118 |
871 |
2816 |
QCISD |
23 |
82 |
38 |
153 |
1130 |
12087 |
CCSD |
29 |
113 |
47 |
221 |
1298 |
13147 |
QCISD(T) |
31 |
158 |
57 |
307 |
1653 |
15168 |
CCSD(T) |
36 |
191 |
67 |
380 |
1912 |
16073 |
basis functions |
38 |
68 |
48 |
82 |
116 |
184 |
For a graph of part of the table above click here
Times for methods in which the basis set is defined as part of the method.
Level |
Time |
AM1 | 3 |
PM3 | 6 |
G2 | 840 |
Geometry optimization calculations
Typical GAUSSIAN input :
%mem=24000000
#HF/6-31G* opt=z-matrix optcyc=1 scf=tight
test of times on various machines
0 1
C
O 1 rco
H 2 roh 1 aoh
H 1 rh1 2 ach1 3 180.0
H 1 rh2 2 ach2 4 d2
H 1 rh2 2 ach2 4 -d2
rco 1.4
roh 0.95
rh1 1.081
rh2 1.087
aoh 109.5
ach1 107.2
ach2 112.1
d2 120.0
Times are wall-clock seconds for job to run.
Gaussian 98 (IBM-RS6000-G98RevA.4) was used
on a dedicated IBM RS6000/397 (AIX Version 4.2.1)
with 1GB memory.
Level |
6-31G* |
6-311+G** |
cc-pVDZ |
aug-cc-pVDZ |
cc-pVTZ |
aug-cc-pVTZ |
HF | 19 | 29 | 25 | 52 | 364 | 1810 |
BLYP | 38 | 75 | 51 | 119 | 387 | 1689 |
B3LYP | 39 | 74 | 51 | 122 | 433 | 1924 |
B3PW91 | 39 | 76 | 51 | 124 | 422 | 1921 |
MP2FC | 27 | 54 | 42 | 122 | 865 | 4749 |
MP2FU | 27 | 57 | 43 | 124 | 877 | |
MP4FC | 491 | 2850 | 1008 | 5871 | 23757 | |
CID | 34 | 158 | 64 | 385 | 2667 | |
CISD | 38 | 181 | 72 | 440 | 2933 | |
CCD | 44 | 215 | 82 | 476 | 2983 | |
QCISD | 56 | 290 | 107 | 671 | 2011 | |
CCSD | 654 | 3037 | 1183 | 6362 | 34224 | |
QCISD(T) | 723 | 4258 | 1444 | 8715 | 44820 | |
CCSD(T) | 880 | 5188 | 1750 | 10810 | 50390 | |
basis functions | 38 | 68 | 48 | 82 | 116 | 184 |
For a graph of this table click here
Times for methods in which the basis set is defined as part of the method.
Level |
Time |
AM1 | 5 |
PM3 | 6 |
G2 | 840 |