#8GB VS 16GB RAM FOR THE FUTURE HOW TO#
#8GB VS 16GB RAM FOR THE FUTURE SOFTWARE#

The Z690 motherboard platform, the only one supporting Alder Lake so far, encompasses support for both DDR4 and DDR5 memory. Our test modules, along with the DDR5-capable Asrock Z690 Taichi All modules are organized as single (64-bit) rank, despite the way each DDR5 rank is divided. Crucial supplied us with a kit of the industry-standard DDR5-4800 for todayвЂ™s technology evaluation, and Mushkin stepped in with several of its XMP-enabled (overclockable) DDR4 kits to allow for testing across multiple data rates. Here is the component pick list we used.ДЄll of the DDR4 and DDR5 memory kits tested were 32GB kits, comprising two 16GB modules. The rest of the testbed components, apart from the motherboards and memory modules, were used in common. DDR5 below, DDR4 above: All the RAM we used in our tests.ДЇor our DDR5-versus-DDR4 faceoff, we configured two testbed PCs in sequence using the Intel Alder Lake Core i9-12900KF (the graphics-free version of the Core i9-12900K flagship Alder Lake CPU) on two different Z690 motherboards (one for DDR5 testing, one for DDR4 testing). (Again, check out that piece for a much more detailed background discussion of memory ranks.) With this many factors in play, we really didnвЂ™t know what to expect when we tossed several modules into our test systems for a modern-DDR throwdown. DDR4Д®ach 64-bit rank of DDR5 memory (a rank being a subset of memory chips on a memory module) is divided into two 32-bit ranks, with the latency benefits described in that same overview article being applied in a slightly different way.

But thereвЂ™s more to it than that! How We Tested: DDR5 vs. You'd think that JEDEC ( the industry group that standardizes DRAM) would have at least waited for its memory makers to get DDR5-4800 down to CAS 36 just to stay on track with its previous efforts. But that just means that DDR5-4800 CAS 40 can only be as quick as DDR4-2400 CAS 20, which would in turn still be laggier than the slowest DDR4-2400 at CAS 18.

#8GB VS 16GB RAM FOR THE FUTURE HOW TO#

Of course, the latency situation for DDR5 isnвЂ™t as dire as that big number appears at first blush: Latency is specified in clock cycles, so that anything that cycles twice as fast requires half as much time per clock cycle, as outlined in our overview of how to buy the right RAM. Lower numbers, all things being equal, are better when you're talking about latency figures for memory. (Higher-data-rate DDR5 RAM has been announced, but good luck finding any at this writing!) With DDR4 CAS latencies below 20 in high-performing DDR4 memory, that 'CAS 40' might sound concerning. Scalpers were even getting in on the proceedings.) And while we expect industry-standard DDR5 to eventually reach data rates as high as DDR5-6400, whatвЂ™s currently available is DDR5-4800, with a sluggish-sounding CAS latency rating of 40. (Indeed, DDR5 of any kind, period, was scarce at this writing in late November 2021. Why is that? For starters, hardly any high-end (overclocked), performance-grade DDR5 has come available yet.

#8GB VS 16GB RAM FOR THE FUTURE SOFTWARE#

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8gb vs 16gb ram for the future