G.Skill Ripjaws SO-DIMM 64GB (2x32GB) DDR5-4800 CL40 SODIMM Black

64GB of DDR5 SODIMM at 4800 MT/s with CL40 timings. Capacity is top-tier at the 90th percentile, but latency is rough at the 18th percentile. The big caveat: you need XMP support or this kit won't boot. Owners rate it 4.7/5, but compatibility complaints are the recurring theme.

Let's talk numbers. This kit runs at 4800 MT/s, which puts it in the 68th percentile for speed. Not the fastest DDR5 SODIMM out there, but solid. The real story is the capacity. 64GB puts it in the 90th percentile, and for laptops that's a huge deal. You're doubling or quadrupling what most gaming laptops ship with. The timings are CL40-39-39-76 at 1.10V, which is efficient but not tight. That 18th percentile latency ranking tells you everything: this is a capacity play, not a speed demon.

One owner reported getting 4800 MT/s at CL36 on a Zephyrus Duo 16, which is better than the stock CL40. So there's some headroom if your BIOS lets you tweak. But the recurring theme in reviews is that XMP is mandatory. Without XMP support, you're stuck at JEDEC speeds or worse, no boot at all.

Against the Kingston FURY Beast KF564C32BWEAK2-64, this G.Skill kit is slower. The Kingston runs at 6400 MT/s with CL32, which is a whole tier above in both speed and latency. The Corsair VENGEANCE RGB CMH64GX5M2Y6400C32 also hits 6400 MT/s and adds RGB if you care about that. The Crucial Pro Overclocking CP2K16G64C32U5B is interesting because it's a 64GB kit with overclocking headroom and likely better plug-and-play compatibility. The KLEVV CRAS V RGB and Team Group T-CREATE EXPERT both run at 6400 MT/s too. So this G.Skill kit is the slowest of the bunch at 4800 MT/s. What it has going for it is the Ripjaws reputation and that 4.7/5 rating. But if your laptop supports faster DDR5, you're leaving performance on the table here.

The value story here is complicated. Affordability sits in the 12th percentile, which means this is one of the pricier SODIMM kits in our database. In the US, prices range from USD 850 to USD 1,182 across 3 listings. That's a USD 332 spread, which is wild. If you're buying in the US, shop around. Newegg and Best Buy both carry it, and the price difference between vendors is enough to buy a decent SSD. In Canada, the spread is even worse: CAD 1,370 to CAD 2,142 across 2 listings. That's a CAD 772 gap. Do not pay the high end of that range. For the capacity you're getting, it's not a bad deal at the low end, but this is not budget RAM by any stretch.

64GB of DDR5 in a laptop is no joke, and this G.Skill Ripjaws kit lands in the 90th percentile for capacity in our database. That's the headline. You're getting 2 x 32GB sticks running at 4800 MT/s with CL40 timings at a modest 1.10V. For anyone doing heavy multitasking, video editing, or running VMs on a laptop, this is a serious upgrade from the 16GB or 32GB most machines ship with.

But here's the catch: the latency sits in the 18th percentile, and the user sentiment score is only in the 36th percentile. That's a weird combo. Owners love the speed and reliability, but the XMP requirement has burned at least a few people. If your laptop doesn't support XMP, this kit may not boot at all. More on that below.

If your laptop doesn't support XMP, skip this kit entirely. The Dell XPS 15 9520 is a confirmed no-go, and any laptop with locked BIOS memory settings will likely have the same problem. Also skip it if you're on a budget. Affordability is in the 12th percentile, and with US prices ranging from USD 850 to USD 1,182, you're paying a premium for the capacity. If you don't need 64GB, there are cheaper 32GB kits that will serve you just as well. And if your laptop supports faster DDR5, look at the Kingston FURY Beast or Corsair Vengeance kits running at 6400 MT/s instead. This G.Skill kit is a capacity play, not a speed play.

The 4.7/5 rating from 101 reviews tells you most buyers are happy. The 64GB capacity is the real selling point, and for laptops that support XMP, this kit delivers. But the compatibility issues are real. One verified buyer couldn't get it to boot on a Dell XPS 15 9520 because the laptop doesn't support XMP. That's a dealbreaker if you own that machine or anything similar. Check your laptop's BIOS before buying. If XMP is supported, this is a solid upgrade. If not, look elsewhere. The 36th percentile user sentiment score is a warning sign, not a dealbreaker, but it's there for a reason.