NT1XP YH9D7 255W Power Supply for Dell Optiplex 3020 7020 9020 Precision T1700 Small Form Factor (SFF) Systems R7PPW 3XRJ0 V9MVK FP16X T4GWM M9GW7 FN3MN H255ES-00 D255AS-00 D255E001L F255ES-00
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AI Verdict
This is a direct, no-nonsense 255W replacement power supply that perfectly fits Dell Optiplex SFF cases, saving you from buying a whole new PC when your original unit dies.
This is a highly specialized replacement part that only makes sense if you own a specific generation of Dell Small Form Factor PCs. It perfectly matches the proprietary 8-pin motherboard layout and 2.4 x 9.4 x 2.8-inch dimensions of the Optiplex 3020/7020/9020 SFF, but is completely useless for standard ATX builds or other Dell case sizes.
If you want to add a low-profile gaming GPU, look for the Dell 315W OEM upgrade (part 4FCWX) instead of this 255W unit.
Regret Score™
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Issues discovered after purchase
Critically weak dimension
Amazon rating vs actual quality
Chance this product isn't for you
Pros
- Exact physical match for Dell SFF cases (2.4 x 9.4 x 2.8 inches), sliding right into the original mounting bracket
- Includes the proprietary Dell 8-pin and 4-pin motherboard connectors, bypassing the need for a 24-pin adapter
- Delivers 255W max power, matching the OEM Dell wattage to safely run standard office configurations
- Installation takes under 10 minutes since the screw holes align perfectly with the factory chassis
Cons
- Outputs only 255W, lacking the wattage to support dedicated graphics cards that require external PCIe power cables
- The cooling fan runs noticeably louder and hotter than the original Dell OEM unit under heavy loads
- Cables are cut exactly to length for specific Dell SFF cases, leaving zero slack for custom routing
- Does not include a replacement AC power cord in the box
Dimension Scores
Outputs a basic 255W to match OEM specs, but lacks 80 Plus certification for high efficiency.
The cooling fan is functional but tends to run louder than the original factory Dell unit.
Standard aftermarket metal housing that aligns perfectly with Dell's proprietary screw holes.
Cables are pre-measured for the exact SFF case layout, eliminating excess wire clutter.
Best For
- Reviving a dead Dell Optiplex 3020, 7020, or 9020 Small Form Factor office PC
- IT admins needing a cheap, drop-in replacement for aging Precision T1700 SFF workstations
- Users who want a plug-and-play fix without messing with 24-pin to 8-pin motherboard adapters
Not Recommended For
- Upgrading an Optiplex to a gaming PC with a dedicated GPU like a GTX 1650
- Dell Mini Tower (MT) or Micro (MFF) cases — this only fits the Small Form Factor (SFF) chassis
Watch Out For
- Form factor confusion — this will absolutely not fit Dell Mini Tower (MT) cases, which require a standard ATX size or different proprietary shape.
- No PCIe power cables — if you are trying to add a graphics card that needs a 6-pin or 8-pin power connector, this PSU lacks the necessary cables.
- Missing power cord — you have to reuse the AC cable from your dead power supply because this unit ships bare.
- Thermal output — some users report this aftermarket unit runs slightly hotter than the original Dell power supply, requiring clear case exhaust vents.
Full Specifications
| ASIN | B07CHCNBM8 |
| Brand | POINWER |
| Wattage | 255 watts |
| Model Name | AC255AS-00 |
| Form Factor | ATX |
| Item Weight | 2.16 pounds |
| Manufacturer | POINWER |
| Connector Type | 8-pin,atx |
| Cooling Method | Air |
| Current Rating | 5 Amps |
| Output Wattage | 265 Watts |
| Item model number | AC255AS-00 AC255ES-00 DPS-255LB |
| Compatible Devices | Desktop Computer |
| Package Dimensions | 10.87 x 4.25 x 3.5 inches |
| Maximum Input Voltage | 240 Volts |
| Is Discontinued By Manufacturer | No |
What Buyers Say
The most consistent feedback is sheer relief that this aftermarket unit actually fits the weird proprietary Dell SFF chassis perfectly. Buyers love that it has the exact 8-pin and 4-pin connectors required, meaning no sketchy adapter cables are needed to get the motherboard powered. A recurring note is that the fan can be a bit whinier than the original Dell unit when the system is under load. It is strictly a repair part, not an upgrade, as the 255W limit strictly caps what you can add to the system.
“My 9020 SFF died completely, popped this in and it booted right up without needing any weird 24-pin adapters, though the fan is a little louder than the old one.”
Common Praise
- Screw holes align perfectly with the Dell SFF chassis locking mechanism
- Includes the proprietary 8-pin motherboard connector natively
- Brings dead office PCs back to life for under $50
- Installation takes less than 10 minutes with just a Phillips screwdriver
Common Complaints
- Fan noise is noticeably louder than the original Dell power supply
- Unit runs slightly warmer than the OEM version
- Does not include a replacement AC power cord
- Zero headroom for adding power-hungry dedicated graphics cards
Ownership Tips
- The fan curve seems more aggressive, spinning up faster during basic tasks like Windows updates.
- Cables are stiff out of the box and require firm bending to route around the hard drive caddy.
- Dust buildup happens quickly due to the small 80mm exhaust fan, requiring more frequent compressed air cleanings.
Frequently Asked Questions
Will this fit my Dell Optiplex 9020 Mini Tower?
No. This is exclusively for the Small Form Factor (SFF) case. The Mini Tower uses a completely different physical size and mounting mechanism.
Do I need a 24-pin to 8-pin adapter cable to use this?
No adapter is needed. This power supply already has the proprietary Dell 8-pin and 4-pin connectors built right in.
Can I run a GTX 1050 Ti or GTX 1650 with this power supply?
Yes, but only low-profile models that draw all their power (under 75W) directly from the PCIe slot. This PSU does not have extra 6-pin or 8-pin PCIe power cables.
Does it come with the mounting screws and power cord?
No. It is a bare replacement drive, so you must reuse the three mounting screws and the AC power cable from your old power supply.
Is this an official Dell OEM part?
No, this is an aftermarket replacement made by POINWER, designed to match the specs and fit of Dell part numbers like YH9D7 and NT1XP.
Buying Guide
When buying a replacement power supply for a Dell Optiplex, you have to ignore standard PC building rules. Dell uses proprietary motherboard connectors and weird case shapes, so a standard ATX power supply simply will not fit or plug in. You need to verify two things: your exact case size (Small Form Factor vs Mini Tower) and your original power supply's part number. This unit is a direct clone of the factory SFF power supply, meaning it is a pure replacement part, not an upgrade for gaming.
Form Factor (SFF vs MT)
Dell makes the same computer in different sizes. SFF (Small Form Factor) is the slim desktop size, while MT (Mini Tower) is the thicker, traditional PC shape. This PSU only fits the slim ones.
8-Pin Motherboard Connector
Standard PCs use a massive 24-pin plug for the motherboard. Dell uses a custom 8-pin plug. This PSU has the 8-pin built in, saving you from buying a messy adapter cable.
255W Max Power
This is the total electrical budget for your PC. 255W is plenty for office work and web browsing, but it acts like a 4-cylinder engine—it will not support heavy-duty gaming graphics cards.
Alternatives
If you are trying to turn your Optiplex into a gaming PC and need more power, search for the Dell 315W OEM power supply (part number 4FCWX) or look into standard ATX power supplies paired with a 24-pin to 8-pin adapter if you have the larger Mini Tower case.
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