NEC rolled out two new lines in the Parallel ACOS series — the PX7800SV and the PX7600SV — in April 1998. The PX7800SV line in particular ran on the newly developed NOAH-4, a CMOS processor, and set the world speed record with the 32 NOAH-4 processor model. The PX7800SV line consisted of 17 models with twice the speed on a standalone basis of previous models. The PX7600SV line consisted of nine models with 1.6 times the speed on a standalone basis of previous models. Together the two lines offered a 250-fold performance range. All models ran the ACOS-4/NPX operating system.
NEC developed the NOAH-4 CMOS processor using a 0.25 micron semiconductor process. The 32-processor model reached world-record speeds. The NOAH-4 processor had the same standalone performance as the bipolar processor used with the ACOS system 3800 but gave five to nine times the cost effectiveness, required only one-fifth the mounting space, and consumed only 1/35 the power.
| Model | 313 SV |
314 SV |
321 SV |
322 SV |
323 SV |
324 SV |
326 SV |
328 SV |
334 SV |
|---|---|---|---|---|---|---|---|---|---|
| No. of processors | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 4 | 6 |
| Main memory capacity | 256 - 2，048ＭＢ | ||||||||
| Expanded memory capacity | 256 - 32，768ＭＢ | ||||||||
| Max. number of channels | Electric/optical: 1,024; high-speed optical: 256; high-speed optical loop: 256 | ||||||||
| File-sharing parallel system | 16 CPUs max. | ||||||||
| Operating system | ACOS-4/ＮPX | ||||||||
| Model | 338 SV |
344 SV |
348 SV |
358 SV |
368 SV |
378 SV |
388 SV |
398 SV |
|---|---|---|---|---|---|---|---|---|
| No. of processors | 8 | 10 | 12 | 16 | 20 | 24 | 28 | 32 |
| Main memory capacity | 256 - 2，048ＭＢ | 512 - 2，048ＭＢ | ||||||
| Expanded memory capacity | 256 - 32，768ＭＢ | |||||||
| Max. number of channels | Electric/optical: 1,024; high-speed optical: 256; high-speed optical loop: 256 | |||||||
| File-sharing parallel system | 16 CPUs max. | |||||||
| Operating system | ACOS-4/ＮPX | |||||||
