DDR4 Samsung 8 Gbit B Die (4S8B_DR)
For DDR4, we naturally reach for the probably best-known RAM IC of the entire generation, Samsung’s 8 Gbit B-Die. The MSI PRO Z690-A WIFI DDR4 is used as the base unit. With its good OC potential and relatively low price, this board has already established itself as an insider tip among enthusiasts for the LGA1700 platform since Alder Lake. Especially for Gear 1 operation with 1:1 clock coupling between the CPU’s memory controller and RAM, this board is very well suited even at relatively high clock rates. And precisely this Gear 1 operation is one of the decisive reasons why DDR4 is still superior to the newer DDR5 standard in some applications, as we will also see in the benchmarks.
A Trident Z Neo kit from G.Skill is used as a reference, which is already equipped with an aggressive XMP profile of DDR4-3800 at timings 14-16-16-36 with 1.5 V ex-works. In addition, the 16 GB modules are equipped on both sides, which results in a dual-rank topology. Due to the lower number of bank groups compared to DDR5, DDR4 has a disadvantage here, which can be compensated with several ranks. Dual-Rank is the performance sweet spot and thus this kit should represent DDR4 in the best light. By the way, the relatively fast and tight XMP profile is completely “plug and play” in the latest BIOS 1A0, even when you additionally enable the Gear 1 mode. The kit is also sent into the race with this config.
When manually overclocking, the kit still manages DDR4-4300 in Gear 1, but only with Command Rate 2T. 1T no longer seems to work in the current BIOS or with RPL CPUs, as it still does with Alder Lake, but the influence on the latency should be relatively low. 1.4 V System Agent and 1.325 CPU VDDQ have to be used, which is still absolutely within limits for daily use.
Incidentally, the error devil seems to have crept in at Intel or MSI with the DR and DD timings, because DR (different rank) timings can be completely set to 0 at runtime, while the DD (different dimm) actually control the delay to the other rank here. However, setting the DR timings in the BIOS to 0 or 4 prevents successful training. Therefore, both timings are set synchronously here, although actually only one should be needed at a time – at least according to my knowledge.
You can read more details about the kit in our dedicated review:
- 1 - Introduction and concept
- 2 - DDR4 Samsung 8 Gbit B Die (4S8B)
- 3 - DDR5 SK Hynix 16 Gbit A Die (5H16A)
- 4 - DDR5 SK Hynix 16 Gbit M Die (5H16M)
- 5 - DDR5 Samsung 16 Gbit B Die (5S16B)
- 6 - DDR5 Micron 16 Gbit Rev A (5M16A)
- 7 - Synthetics (1/2) – PyPrime 2.0 2b, y-cruncher 2.5b
- 8 - Synthetics (2/2) – Geekbench 3, AIDA64
- 9 - Gaming (1/3) – Assetto Corsa Competizione, Marvel's Spider-Man Remastered
- 10 - Gaming (2/3) – Dead Space (2023), Cyberpunk 2077
- 11 - Gaming (3/3) – Shadow of the Tomb Raider
- 12 - Summary and conclusion
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