GW Instek GPP-4323
#4 in Multi-outputFull review
A four-channel programmable supply for labs that need many precise rails and automated tests in one unit.
Amazon $897.86$897.86
The GW Instek GPP-4323 is the better bench power supply overall, rated 3.5 to 2.4. The GW Instek GPP-4323 leads on resolution, PC control and protection & features. The GW Instek GPD-3303D costs $178.86 less ($719 vs $897.86).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
GW Instek GPD-3303D
#8 in Multi-outputFull review
A triple-output linear supply from a lab brand, outclassed here on price and setting resolution.
Amazon $719$719
Which should you buy?
- Choose the GW Instek GPP-4323 for resolution (1 mV / 0.1 mA setting resolution vs 100 mV / 10 mA setting resolution), PC control (USB, RS232, LAN with SCPI vs USB) and protection & features (over-voltage protection, over-current protection, stored setups vs stored setups).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every multi-output bench power supply; a clear win is highlighted. How we rank explains each one.
| Factor weight | GW Instek GPP-4323 | GW Instek GPD-3303D |
|---|---|---|
| Overall rating | 3.5/5 | 2.4/5 |
| Value 25% | 5 $4.24 per watt ($897.86, 212 W from the channel ratings) | 9 $3.69 per watt ($719, 195 W rated) |
| Output quality 20% | 96 0.3 mVrms ripple and noise | 71 1 mVrms ripple and noise |
| Resolution 15% | 100 1 mV / 0.1 mA setting resolution | 0 100 mV / 10 mA setting resolution |
| PC control 15% | 100 USB, RS232, LAN with SCPI | 50 USB |
| Protection & features 10% | 80 over-voltage protection, over-current protection, stored setups | 20 stored setups |
| Warranty 15% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| GW Instek GPP-4323 | GW Instek GPD-3303D | |
|---|---|---|
| Output | ||
| Type | Power supply | Power supply |
| Regulation | - | Linear |
| Channels | 4 | 3 |
| Channel ratings | 32 V/3 A, 32 V/3 A, 5 V/1 A, 15 V/1 A | 30 V/3 A, 30 V/3 A, 2.5/3.3/5 V/3 A |
| Max voltage | 32 V | 30 V |
| Max current | 3 A | 3 A |
| Rated power | 212 W (channels added) | 195 W |
| Ripple and noise | 0.3 mVrms | 1 mVrms |
| Precision | ||
| Setting resolution | 1 mV / 0.1 mA | 100 mV / 10 mA |
| Readback resolution | 0.1 mV / 0.1 mA | 100 mV / 10 mA |
| Control | ||
| PC interfaces | USB, RS232, LAN | USB |
| SCPI | Yes | - |
| Stored setups | 10 | 4 |
| Over-voltage protection | Yes | - |
| Over-current protection | Yes | - |
| Build | ||
| Weight | 16.5 lb | 15.4 lb |