Buying CPUs, motherboards & memory gets confusing when a processor, two desktop-memory choices, and a SO-DIMM adapter appear side by side. The fastest way to narrow the field is to identify the component role first, then use the named socket, module format, or conversion purpose. That prevents buying memory when the project calls for a CPU, or choosing an adapter when the goal is a desktop memory module.
Quick take
These four choices are not direct substitutes. The Intel Core i7-8700 is a desktop processor, while the G.SKILL Ripjaws S5 and SK hynix Lenovo HMCG78AGBUA081N are desktop-memory entries. The DDR3/DDR4/DDR5 SO-DIMM-to-PC DIMM card serves a conversion role. Start with the part category you need, then use the more specific labels to make the final call. If your search began with a motherboard in mind, keep socket and board-model requirements separate from these processor, memory, and adapter decisions.
Listed-price comparison
| Listed item | Component role | Listed price | Price bar |
|---|---|---|---|
| G.SKILL Ripjaws S5 | Desktop memory | USD 379.00 | |
| DDR3/DDR4/DDR5 SO-DIMM-to-PC DIMM Adapter Card | Memory adapter card | USD 93.58 | |
| SK hynix Lenovo HMCG78AGBUA081N | Desktop memory | USD 234.99 | |
| Intel Core i7-8700 SR3QS | Desktop CPU | USD 64.00 |
Decision matrix
Use the first statement that fits the part you are actually trying to buy:
- A Core i7-8700 processor with SR3QS and LGA 1151 in its identification: choose the Intel Core i7-8700.
- One 32GB DDR5-6000 CL32 module with XMP 3.0 Intel wording: choose the G.SKILL Ripjaws S5.
- A 16GB PC5-5600B UDIMM identified as HMCG78AGBUA081N: choose the SK hynix Lenovo memory.
- A 10pcs DDR5 selection for SO-DIMM-to-PC DIMM conversion: choose the adapter-card lot.
Product notes
G.SKILL Ripjaws S5 DDR5 Memory
G.SKILL Ripjaws S5 is the direct match for a component list that names one 32GB DDR5 module, DDR5-6000, CL32, and XMP 3.0. Those details keep the decision focused on a particular desktop-memory specification rather than the conversion purpose of the adapter card or the processor role of the Core i7. Choose it when that combination is non-negotiable for your build plan. The tradeoff is straightforward: its USD 379 listed price is the group's highest, and the title specifies 1x32GB. Treat it as a one-module memory purchase rather than a way to cover several component roles at once.
DDR3/DDR4/DDR5 SO-DIMM-to-PC DIMM Adapter Card
The DDR3/DDR4/DDR5 SO-DIMM-to-PC DIMM Adapter Card is for a different job from the memory sticks: its title explicitly frames it as a laptop-to-desktop memory adapter card. Pick it when that conversion role is the item on your list, and its new condition may suit shoppers looking for that stated condition. Its important limitation is the selected configuration, 10pcs DDR5: this is a lot of adapter cards, not the single desktop DDR5 module named by the other memory choices. The plug-and-play wording describes the card's intended setup, but it does not make it a replacement for a CPU or a UDIMM.
SK hynix Lenovo DDR5 UDIMM RAM
SK hynix Lenovo DDR5 UDIMM RAM gives you a specific 16GB, PC5-5600B desktop-memory entry with UDIMM form factor and model HMCG78AGBUA081N. That makes it a focused choice when those exact identifiers match the memory you mean to select. It is also described as one stick, which distinguishes the purchase from a multi-piece adapter configuration. The limitation is condition: it is listed as open box. At USD 234.99, it falls between the adapter-card lot and the G.SKILL module in listed price, so its role and model should matter more than a simple lowest-price search.
Intel Core i7-8700 SR3QS Desktop CPU
The Intel Core i7-8700 SR3QS addresses processor-focused shopping, with 3.20GHz, six cores, and LGA 1151 stated in its identification. Choose it when the Core i7-8700 model, SR3QS code, and LGA 1151 designation are your target. Its USD 64.00 listed price is the group low, separating it clearly from the memory entries without making it a substitute for them. The limitation is equally concrete: it is used, and the sale is for the CPU only. Plan it as a processor purchase rather than a bundled motherboard or memory upgrade.
Final recommendation by use case
- Need a desktop processor: the Intel Core i7-8700 SR3QS is the relevant route.
- Need the named Ripjaws S5 memory specification: choose the G.SKILL module.
- Need the HMCG78AGBUA081N UDIMM: choose the SK hynix Lenovo memory.
- Need SO-DIMM-to-PC DIMM conversion cards: choose the DDR3/DDR4/DDR5 adapter lot.
- Need a motherboard: keep that search separate and begin with the socket and board model required for your build.
