/The NX range → Generation 5 → Extended
NX5/X
4,096-entry fold table, the widest we ship. Twenty-four physical blocks presenting as 41.3, the full ninety-second eviction predictor, and 41 dB(A) of fan under sustained load.
NX5/X · folded steel, no window312 × 208 × 74 mm3.1 kg2 × duplex link, 1 × service bus
01What it is
What the /X adds
The /X is the top trim of the NX5. It has twenty-four physical blocks, the same count the NX4 shipped with and four more than the /T. Its fold table runs to 4,096 entries against the /T’s 1,024, and its eviction predictor keeps ninety seconds of history against thirty.
The gap between 24 and 41.3 is the fold engine finding pages that two residents were both carrying and keeping one copy.
What it is bad at
It is loud. 41 dB(A) at one metre under sustained load, and the fan curve steps audibly at 71 °C instead of ramping (issue NS-2029-051, open; the safe fix is louder still). The Mk V is 21 dB(A) doing similar work. If you share a room, buy the /T.
It thrashes past twenty-two residents. A wide fold table costs lookup time, and beyond roughly twenty-two concurrent residents the Mk V’s flatter design overtakes us. The crossover is charted below.
Twelve months of warranty. Cybrscape gives thirty-six on the Mk V.
Against the /T
- Credits
- 11,200 vs 7,400
- Physical blocks
- 24 vs 20
- Effective blocks
- 41.3 vs 32.4
- Sustained MB/s
- 1,180 vs 690
- Noise dB(A)
- 41 vs 31
- Draw W
- 118 vs 72
The /X costs 51% more credits for 71% more throughput and ten more decibels. For most buyers the /T is the better deck.
The NX5/T02Benchmarks
Where it wins and where it stops
- NX5/X
- Mk V
Both curves are ours, run on the same day with the same profile. We lead by 310 MB/s at a typical set and we lose the lead at 22 residents. If your working set is routinely wider than that, the Mk V is the better deck.
Figures
| Resident | NX5/X (MB/s) | Mk V (MB/s) |
|---|---|---|
| 2 | 1,180 | 870 |
| 6 | 1,176 | 868 |
| 10 | 1,168 | 862 |
| 14 | 1,140 | 848 |
| 18 | 1,010 | 812 |
| 22 | 720 | 744 |
| 26 | 430 | 640 |
| 30 | 250 | 505 |
- Nitrosoft, generation 5
- Cybrscape, measured by us
- Nitrosoft, generation 4
Cybrscape units measured 14 June 2029: two retail Mk V, two retail Mk IV, unmodified firmware. These are our measurements, not their specification.
Figures
| Unit | MB/s |
|---|---|
| NX5/X | 1,180 |
| Mk V | 870 |
| NX5/T | 690 |
| NX4/T | 520 |
| Mk IV | 430 |
| NX5/S | 410 |
- Physical blocks
- Effective blocks, folded
G4 to G5 added no memory. The fold ratio went from 1.46× to 1.72×.
Figures
| Unit | Physical | Effective | Ratio |
|---|---|---|---|
| G1 NX1 | 12 | 13.4 | 1.12x |
| G2 NX2 | 16 | 19.0 | 1.19x |
| G3 NX3 | 20 | 26.6 | 1.33x |
| G4 NX4 | 24 | 35.0 | 1.46x |
| G5 NX5 | 24 | 41.3 | 1.72x |
03Specification
Everything we measure
| Physical blocks | 24 |
|---|---|
| Effective blocks, mixed set | 41.3 |
| Fold ratio, measured | 1.72× |
| Fold table width | 4,096 entries |
| Page granularity | 64 B |
| Residents, typical mixed set | 19 |
| Residents, hard ceiling | 26 |
| Eviction predictor history | 90 s rolling |
| Sustained cache throughput | 1,180 MB/s |
|---|---|
| Peak burst, under 2 s | 1,760 MB/s |
| Sustained at 22 residents | 720 MB/s |
| Sustained at 30 residents | 250 MB/s |
| Cold jack to first resident | 2.1 s |
| Warm re-jack | 0.4 s |
| ICE traversal, median, Barrier class | 14 ms |
|---|---|
| ICE traversal, 99th percentile | 63 ms |
| Trace floor at idle | 1.6 counts/min |
| Trace floor, full resident set | 9.8 counts/min |
| Link interfaces | 2 × duplex link, 1 × service bus |
| Draw, sustained load | 118 W |
|---|---|
| Draw, idle | 19 W |
| Noise at one metre, sustained load | 41 dB(A) |
| Noise at idle | 24 dB(A) |
| Thermal ceiling before throttle | 84 °C |
| Mass | 3.1 kg |
| Enclosure | 312 × 208 × 74 mm, folded steel, no window |
| Mounting | desk, or two-unit rack tray (sold separately) |
| Deck code | NX5-X |
|---|---|
| Credits | 11,200 cr |
| Credits per 100 MB/s sustained | 949 cr |
| Warranty | 12 months, parts and labour |
| Firmware support to | April 2034 |
| Runtime | Hotfloor 4.1 |
In the box: the deck, a service bus cable, a fold-table reference card, and the twelve-month warranty statement. Link cables are not included. Runtime is Hotfloor 4.1, updated over the service bus, changelog published the day it ships.
04Ordering