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Sabrent Rocket 64GB (4x16GB) 4800MHz DDR5 Memory Kit Review

Memory by stefan @ 2022-07-12

While operating with two Rocket DDR5 modules of 16GB each, each running overclocked at 6000MHz it was quite an easy and straightforward task, we cannot say the same when all four slots are populated. In compatibility mode, as Intel recommends on the Z690 platform, 4000MHz is guaranteed and this is the speed the 64GB kit operates with in automatic mode. For running at 4800MHz, we needed a bit of extra voltage tweaking concerning VSA, VDDQ and VDD2 but in the end we could validate stability with TM5 and all benchmarks we ran afterwards have completed without any errors.

Test Setup and Test Results Part I

Test Setup

CPU: Intel i7-12700K @ Stock

CPU Cooler: be quiet! Pure Loop 240mm AIO

Motherboard: EVGA Z690 CLASSIFIED

RAM: currently tested kit

Video: XFX Radeon RX 5700XT Ultra THICC III

Power Supply: Cooler Master 850W

SSD: Silicon Power US70 1TB PCIe 4.0

Case: Cooler Master ATCS 840

The pre-programmed timings and frequencies can be also found by using AIDA64; the DRAM IC manufacturer is listed as SK hynix:

As you have probably noted from the first screenshot, these modules do not come with a pre-loaded XMP profile, so the motherboard will automatically go for the most compatible timing set after the first boot-up. With four modules installed, our Z690 CLASSIFIED board has loaded the RAM at 4000MHz and not 4800 as we have had hoped. In order to boot at 4800MHz, we have had to set VSA at 1.1V, VDDQ at 1.25V and VDD2 at 1.25V, otherwise the board did remain stuck in a continuous training loop. Here is the validation:

We tried to also boot at 5200MHz but unfortunately after working for several hours doing tweaks, the system did remain stuck in training mode.

Test Results

SuperPI XS 1.5 2MB

GeekBench 4

Blender Ryzen Rendering

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