OLOy 64GB (2x32GB) DDR4-2666 CL19 SODIMM (MD4S3226190IZ1DC)

OLOy's 64GB DDR4 SODIMM kit is a capacity monster for older Intel laptops, landing in the 90th percentile for memory size. The 2666 MT/s speed and CL19 latency are nothing special, but that's not the point. At around USD 400, it's a reasonable way to max out a DDR4 laptop without replacing it. If your machine takes DDR4 and you need 64GB, this is a solid buy with a lifetime warranty and strong user reviews.

Let's talk about what 2666 MT/s actually means in practice. For everyday tasks like web browsing, office work, and even light photo editing, you won't notice much difference between this and faster DDR4 kits. The CL19 latency translates to roughly 14.25 nanoseconds of first-word latency, which is adequate but not snappy. Where you'll feel it is in memory-bandwidth-sensitive workloads like video encoding or large dataset processing, where faster kits at 3200 MT/s or beyond would pull ahead.

The 1.2V operating voltage is standard for DDR4 and keeps thermals in check, which matters in cramped laptop chassis. The 19-19-19-43 timings are loose by today's standards, but they're typical for high-density 32GB modules. Denser sticks often sacrifice a bit of latency for stability, and that's the trade-off you're accepting here. OLOy does claim 100% burn-in testing and original chip sourcing, which should give some peace of mind for a brand that doesn't have the same track record as Corsair or Kingston.

The competitors listed in our database are mostly DDR5 desktop kits, which tells you something about where the market has moved. The Corsair Vengeance CMK64GX5M2B6000Z30 and G.Skill Trident Z5 Royal Neo are both 64GB DDR5 kits running at 6000 MT/s, which absolutely demolishes this OLOy kit in raw bandwidth. But those are desktop DIMMs, not SODIMMs, so they're not even an option for laptop users. The Kingston Fury Renegade and Crucial Pro Overclocking kits are also desktop-focused.

For laptop users specifically, the real comparison is against other DDR4 SODIMM kits from Crucial, Kingston, or Samsung. Those brands have more established reputations in the OEM space, and Crucial in particular tends to offer similar capacity at competitive prices. The trade-off is that OLOy's lifetime warranty and solid user ratings make it a legitimate alternative to the bigger names. If you're comfortable with a lesser-known brand, you might save a few bucks. If you want the safest possible choice, Crucial or Kingston are probably worth the small premium.

Pricing on this kit is a bit all over the map depending on where you live. We're seeing it listed at USD 400 in the US, CAD 602 in Canada, EUR 444 in France, and BRL 4,466 in Brazil. That's a lot of money for DDR4 in 2025, especially when you consider that DDR5 SODIMM kits with similar capacity are starting to come down in price. But here's the thing: if your laptop only takes DDR4, you don't have a choice. You either buy this or you buy a new laptop.

Compared to other 64GB DDR4 SODIMM options, the OLOy kit is actually competitive. The affordability percentile of 32 suggests it's not the cheapest option out there, but it's also not wildly overpriced for what you get. The lifetime warranty adds some value, and the 4.6-star rating from over 500 buyers suggests people aren't running into reliability issues. If you can find it on sale, it becomes a much easier recommendation.

OLOy isn't exactly a household name in memory, but this 64GB DDR4 SODIMM kit caught our eye because it fills a very specific niche. You've got an older Intel laptop with two SODIMM slots, you need a serious amount of RAM for virtual machines, heavy photo editing, or just keeping 200 browser tabs alive, and you don't want to pay a premium for flashy heat spreaders. That's exactly who this kit is for. It's a straightforward 2x32GB set running at 2666 MT/s with CL19 timings, and it's about as no-nonsense as RAM gets.

The capacity is the headline here. 64GB in a laptop form factor puts this kit in the 90th percentile for capacity in our database, which is genuinely impressive for DDR4 SODIMM. Most laptops from the DDR4 era shipped with 8GB or 16GB, and even enthusiast kits usually topped out at 32GB. If you're running memory-hungry workloads on a machine that can't take DDR5, this is one of the few ways to max things out without replacing the whole laptop.

But the speed story is a different one. 2666 MT/s was fine when DDR4 was current, but it's now middle-of-the-road at best. The speed percentile sits at 38, and latency at 36, so this isn't a kit for people chasing benchmark scores. It's a capacity play, pure and simple. And for the right buyer, that's perfectly fine.

If you're buying or building a new laptop, skip this. DDR5 is the current standard, and spending USD 400 on DDR4 for a new machine is throwing money at outdated tech. Look for a laptop with DDR5 SODIMM slots or soldered LPDDR5 instead. Similarly, if you only need 32GB or less, there are cheaper DDR4 SODIMM kits from Crucial and Kingston that will serve you just as well without paying for capacity you won't use.

Server and workstation users should also look elsewhere. The server score of 31.8 out of 100 in our database reflects the fact that this is unbuffered laptop memory, not ECC registered server RAM. If you're running a home lab or small server, you'll want ECC memory for data integrity, and this kit doesn't offer that. The workstation score of 59.8 is better, but still reflects the speed limitations for heavy professional workloads.

If you've got an older Intel laptop that supports DDR4 SODIMM and you need to max out the RAM, this OLOy kit is a solid choice. The 64GB capacity is the whole story here, and it delivers that without any fuss. The lifetime warranty and strong customer feedback help offset the fact that OLOy isn't a brand most people recognize. For virtual machines, heavy multitasking, or running memory-intensive applications on aging hardware, this kit will breathe new life into your machine.

But if you're building a new system or buying a new laptop, skip this entirely. DDR5 is the present and future, and spending USD 400 on DDR4 in a new build makes no sense. This kit is for people extending the life of existing hardware, not for anyone starting fresh. And if you only need 32GB, there are cheaper options that will serve you just as well.