Cheapest 64 GB DDR4 desktop RAM (DIMM)
64 GB DDR4 desktop RAM is a memory module for a desktop computer. It slides into a DIMM slot on your motherboard and gives your system room for demanding applications, large files, and many programs at once. Before you buy, check the form factor (DIMM for desktops, not the shorter SO-DIMM used in laptops), the DDR generation and speed your board supports, and the compatibility list for your exact model. Size matters: DDR4 and DDR5 modules look alike but don't fit the same slots.
- Lowest new $500.00
- Lowest per GB $7.81
- Compared 1 product
| $/GB | Price | Capacity | Product | Condition | Store | Link |
|---|---|---|---|---|---|---|
| $7.81 | $500.00 | 2 × 32 GB | G.Skill Ripjaws V 64GB Kit (2 × 32GB) DDR4-3600 CL18 DDR4-3600 CL18 DIMM | New | eBay US | View deal |
Fits these devices
- ASUS PRIME B550-PLUS
- Dell OptiPlex 7010 Small Form Factor
- Dell OptiPlex 3000 Small Form Factor
- ASUS ROG STRIX B550-F GAMING WIFI II
- ASRock B550M Pro4
- Dell OptiPlex 3080 Small Form Factor
- ASUS TUF GAMING B550-PLUS WIFI II
- Dell OptiPlex 5070 Small Form Factor
- Dell PowerEdge R240
- Dell OptiPlex 5050 Small Form Factor
- Dell PowerEdge R340
- MSI MAG X570S TOMAHAWK MAX WIFI
34 devices in our catalog take this part. Search yours on the home page.
Before you buy
- Know your slot before you shop. Desktop boards take full-size DIMMs; laptops take SO-DIMMs, which are much shorter. The DDR generation also matters — DDR3, DDR4, and DDR5 use different key notch positions, so a module from the wrong generation won't seat in the slot. Match the generation, the length, and the type (unbuffered versus ECC/registered) to what your machine needs.
- Match speed to what your system actually supports. Modules run at the fastest speed your board and processor allow, so headroom above that does you no good. If you mix modules of different speeds, the slower one typically sets the pace. DDR4 speeds are often labeled like DDR4-3200 (3200 MT/s), so compare that number against your board's supported list rather than assuming higher is better.
- Check how much your board can really hold. Every board has a maximum total capacity and a maximum per slot, so confirm that 64 GB is supported overall — often as two 32 GB modules or four 16 GB modules. Most desktop boards pair their slots to run in dual channel, which is why matched pairs are common practice. Our catalog lists 33 devices that accept 64 GB DDR4 DIMMs, so check your model there first.
Questions
Will a 64 GB DDR4 DIMM fit and work in my computer?
It fits if your machine uses DDR4 desktop DIMM slots and supports that capacity. Start by confirming three things: the module is a full-size DIMM (not a laptop SO-DIMM), it's DDR4 (not DDR3 or DDR5), and your board's supported memory list includes 64 GB total. Then check the buffer type. Desktop boards usually want unbuffered memory, while some servers and workstations need ECC or registered modules. Our compatibility list covers 33 devices in our catalog, including models like the ASUS PRIME B550-PLUS, Dell OptiPlex 7010 Small Form Factor, Dell OptiPlex 3000 Small Form Factor, ASUS ROG STRIX B550-F GAMING WIFI II, ASRock B550M Pro4, Dell OptiPlex 3080 Small Form Factor, ASUS TUF GAMING B550-PLUS WIFI II, Dell OptiPlex 5070 Small Form Factor, Dell PowerEdge R240, and Dell OptiPlex 5050 Small Form Factor. If your device isn't listed, check its manual or supported-memory documentation.
What DDR4 speed should I buy, and does faster RAM make my computer faster?
Buy the fastest speed your board and processor officially support, and no faster. Memory runs at the speed your system allows, so a module rated above that will simply run at the supported rate. If you install modules with different ratings, the slower rating usually sets the pace for the whole set. DDR4 speeds are commonly labeled as DDR4-2133, DDR4-2400, DDR4-2666, DDR4-3000, or DDR4-3200, with the number referring to transfer rate in MT/s. Your board's supported-memory list is the most reliable source for which of these work.
How much RAM do I actually need — is 64 GB enough?
64 GB is a large amount for most desktop work and suits memory-heavy tasks such as video editing, large simulations, compiling big projects, running multiple virtual machines, or keeping many demanding applications open at once. If your work is mainly browsing, documents, and everyday apps, 64 GB is more than you need. Sizes compared on PartsPrices are 8 GB, 16 GB, 32 GB, and 64 GB, so you can weigh capacity against your own workload before deciding. Remember that the useful amount is also capped by what your board supports.
Is it safe to buy used or refurbished RAM, and what should I check first?
Used and refurbished memory can work well, but a few checks help you avoid trouble. Confirm the module matches your requirements exactly: DDR generation, DIMM form factor, speed, and buffer type (unbuffered versus ECC/registered). Check the seller's return policy and warranty terms, and confirm how the condition is described. Memory that fails testing is worth returning rather than troubleshooting. Once installed, it's worth running a memory test to verify stability. Whether new or used, the same compatibility rules apply — the module must be one your board officially supports.