Overclocking
Stable DDR5-7000 operation is easy for the modules, as long as the motherboard and CPU play along. In fact, much higher clock rates can be booted, but the stability then differs from training to training and is thus no longer suitable for a real daily/gaming setup. The overclocking set here uses 1.55 V VDD and VDDQ with a 120 mm fan on the modules. 1.55 V is also present at CPU VDDQ (IVR TX VDDQ), 1.45 V at VDD2 (IMC VDD) and 1.425 V at SA (IVR VCCSA).
Particularly impressive values in the timings that the kit manages with this are a maximized tREFI, tRRD_S 3 with tFAW 12 and a tCWL of a fabulous 14. While all of the kits we’ve tested so far have been able to stably run a CAS Write Latency of a minimum of 4 under the CAS Latency, the timing on the Trident Z5 modules seems completely independent, with a minimum bootable 10 and an even stable 14. The displayed tWTR timings are then correspondingly high, since these are effectively only calculated from tCWL and tWRRD. However, these are only theoretical values, which are actually not technically available in the memory controllers of Intel Alder Lake CPUs.
Without active cooling, 1.45 V VDD and VDDQ can still be applied, which means that DDR5-6800 can also be operated stably at tCL 32 and tRCD/tRP 41. tREFI must then be lowered accordingly to 65000 to compensate for the higher operating temperature of the modules of just under 75 °C. The bottom line is that the overclocking potential of the Trident Z5 RGB 6400c32 modules is extremely impressive and the highest we have been able to test in DDR5 so far.
Test systems
A pre-selected Asus Maximus Z690 Apex is used as the motherboard and an i9-12900K with the best out of over 60 binned i9 CPUs serves as the CPU. And although such a high overclocking is almost the absolute limit of what is possible for daily use with current motherboards and CPUs, this should change with coming generations and also become possible with common underpinnings. The G.Skill Tritdent Z5 RGB modules already have the OC potential, you just have to be able to coax it out of them.
As always, the rest of the test hardware is available as an overview:
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For better clarity, the following abbreviations are used in the diagrams:
- 12900K: Intel Core i9-12900K CPU
- 51/0/49: Multipliers for P-cores x51, E-cores 0 (deactivated), cache x49 at BCLK 100 MHz
- TZ5: Trident Z5 module from G.Skill
- XPGL: XPG LANCER RGB DDR5 modules from ADATA
- DPR: Dominator Platinum RGB DDR5 modules from Corsair
- FB: Fury Beast DDR5 modules from Kingston
- DR: Dual-Rank, if not specified Single-Rank
- 3600c14: configuration with 3600 Mbps and tCL timing 14, see screenshots for all timings
- 1T, 2T: Command rate 1T or 2T
- *: completely manually set subtimings, see screenshots
- G1, G2: Gear 1, Gear2 – ratio between IMC clock and RAM clock, Gear 1 = 1:1, Gear 2 = 1:2
- H16M: SK Hynix 16 Gbit M-Die memory chips
- S16B: Samsung 16 Gbit B-Die Memory Chips
- ❄: active cooling with a 120 mm 2000 rpm fan
Timings of the DDR4 comparison config:
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