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Green circuit board with gold contacts and black memory chips

OWC

OWC 4GB DDR3 1333 PC3-10600 CL9 1Rx8 240-pin 1.5V UDIMM memory upgrade for Dell OptiPlex 790

SKU CH-046V-4DEWF

4GB DDR3-1333 UDIMM upgrade for Dell OptiPlex 790 desktop, SFF, Tower and USFF systems

  • Total capacity4 GB
  • Rated speedDDR3 1333 (PC3 10600)
  • CAS latencyCL9
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8
  • 4GB capacity adds multitasking headroom for everyday workloads
  • DDR3 1333 PC3-10600 CL9 matches Dell OptiPlex 790 specifications
  • 240-pin UDIMM form factor fits Desktop SFF Tower USFF models
  • 5V non-ECC unbuffered design ensures stable operation
  • JEDEC and RoHS compliant for warranty-safe upgrade

OWC 4GB DDR3 1333 UDIMM for OptiPlex 790

This single 4GB DDR3 module runs at 1333MHz with CL9 latency and 1.5V operation. It uses a 240-pin unbuffered non-ECC design built to JEDEC standards. The upgrade targets Dell OptiPlex 790 Desktop, SFF, Tower and USFF owners who need a straightforward capacity increase.

Suits owners of listed OptiPlex 790 models adding

The module fits only systems that accept DDR3 240-pin UDIMMs at this speed and voltage. Buyers whose motherboards require registered or ECC memory cannot use it. Those needing more than 4GB per slot should look at higher-density modules.

240-pin DDR3 1333 non-ECC unbuffered UDIMM

This form factor and signalling standard is the sole determinant of mechanical and electrical compatibility. Verify the host system supports PC3-10600 unbuffered memory before purchase.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 93% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $4.25 per GB
Cheaper than about 83% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number1U3D31R804 GB
Total capacity4 GB
Product type240-Pin DDR3 Non-ECC UDIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Memory
CAS latencyCL9
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsDell OptiPlex 790 Desktop
Dell OptiPlex 790 SFF
Dell OptiPlex 790 Tower
Dell OptiPlex 790 USFF

Other versions of this model

5 more in the same range

Questions about this item

Will the 1.5V DDR3 1333 CL9 module hit a thermal limit first during sustained all-day workloads?

This 4GB DDR3 1333 PC3-10600 CL9 UDIMM runs at standard JEDEC 1.5V without a heat spreader; the first sustained-use limit is the memory controller's maximum supported frequency and total capacity for the OptiPlex 790 platform.

How much heat or noise does the 240-pin unbuffered DIMM add when the system runs continuously?

The module has no heat spreader and no active cooling; it adds negligible heat and zero noise, with power draw governed by the 1.5V DDR3 1333 specification under load.

What must the Dell OptiPlex 790 already have — free 240-pin slots and BIOS support — for this 4GB 1Rx8 upgrade to work?

A compatible OptiPlex 790 Desktop, SFF, Tower or USFF with an available 240-pin DDR3 slot and BIOS that recognises 4GB 1Rx8 PC3-10600 CL9 modules at 1.5V.

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