24GB per module, that's quite an uncommon spec.
We've seen a lot of capacity specs like 2G, 4G, 8G, 16G, and 32G, mostly a product that's multiplied by 2 the number of times as the exponent. But not the case if it's 24.
So this time I picked a pair of 24GB modules from KingBank to try out how they're doing in overclocking.
Overview >>>
Packed in a red-and-black color box, these modules feature a same design as the previous heatsink modules with a red Chinese character meaning BLADE in the center by the brand name KingBank. This stylish matte-white metallic heat spreader topped with RGB lamps works to cool down modules amid its high-speed operation. Install them on the motherboard and check out the lighting. With 16 ARGB LED lamp beads per module, the lighting runs even and smooth. You can adjust the lighting to a still or running effect.Testing >>>
Configuration
Below is the PC config I used for the testing:
Motherboard: Gigabyte Z790 AORUS ELITE X WIFI7Cooler: Thermaltake Toughliquid Ultra 360Memory: KingBank Heatsink RGB DDR5 6800MHz 48G PSU: Thermaltake Toughpower 1000WMemory Testing
First let's check out the memory modules. In Thaiphoon Burner, we can see these modules use Hynix M dies, 8 chips with each at a capacity of 3Gb, but no specific IC model is displayed. If not for extreme overclocking capability, the M-die chipset is more than enough for a boost-up profile over 7800MHz with this Gigabyte motherboard. But we need to save the test result as txt form in CPU-Z so as to check out the SPD of these 24Gb memory modules. Open the TXT test report and we can see the SPD in binary. Then copy without the first line. Open Thaiphoon, choose File, and Import from Clipboard to check out the SPD. 6800 XMP Testing >>>
Turn to BIOS and enable XMP 1, and we have the benchmarking stays at 102.30 GB/s and 89.84 GB/s for reading and writing performance at a 67.2ns latency. For a more stable daily use, we can actually keep the frequency between 6800-7600MHz.The pre-set XMP 6800 registers 34-45-45-108 timings at 1.4V.
The Gigabyte motherboard has specially pre-set the XMP for memory modules with M-Die chips. This 24Gb spec is granted timings of 40-48-48-128 at 1.4V. We can still boot the PC with dual 24Gb modules stuck up but pressure test is out of the question because the timings and other spec settings are not improved. Not much progress has been seen in rreading, writing and latency.Turn on the High Bandwidth Low Latency mode and add up the voltage on the XMP profile. The modules are seeing quite a breakthrough in speed performance, with reading going up to 121.92GB/s, writing to 121.38GB/s at a latency of 60.6ns. Then I dive into manual twisting of the settings to overclock the modules at 8000MHz with the major timings staying at 40-48-48-68. With tREFI=65535, I turned on theHigh Bandwidth Low Latency mode and let it automatically optimize the more minor settings. Then AIDA64 saw an improvement to 124.28 GB/s and 122.64 GB/s in reading and writing respectively with the latency down to 57.8ns. But without further pushing the timings, this latency can't go parallel with that under extreme tuning utility.
Unlike A-Die modules that need a high voltage to support the booting, these M-Die RAMs of 3G spec are easier on voltage settings. a 1.45V goes enough in use around a frequency of 7800-8000MHz, which on the contrary, leaves the timings on loose. Unable to push for a lower latency, these M-Die RAMs are dwarfted by modules with A-Die chips of a higher quality and more stability.
With rather loose major timings and a high tREFI setting, the memory modules require more adding on the voltage value. DDR5 RAM with PMIC goes more friendly in temperature control. These M-Die modules generate less heat than the A-Die ones. No extra cooling devices is acceptable for use at a frequency lower than 8000MHz.
After three days of OC testing, we've managed to keep KingBank Heatsink RGB DDR5 6800 Memory Modules with M-Die chips at 8000MHz at CL 36-48-48-58, with AIDA64 marking a reading at 124.80 GB/s, writing at 120.92 GB/s and a latency at 56.4ns. Quite some progress!
I set a rather high voltage value to pass TM5 1us tests. More passive cooling devices would be needed for a high voltage use. I set a 1.45V at 8000MHz and both the booting and AIDA64 testing went smooth, but pressure tests failed nor a better timing setting was valid for a four-slot motherboard. So I made it with 1.55V to achieve a steady 8000MHz use.The above screenshots could be some references on voltage and timing settings, like setting VDD and VDDQ at 1.56V, VPP at 1.9V, VDDQ, VDD2 at 1.39V and 1.47V, SA of Auto, major timings at 36-48-48-58.
Conslusion >>>
This KingBank Heatsink RGB DDR5 48G 6800 DRAM goes a lot above our expectations on overclocking experience. M-Die modules are easier in overclocking, and our try went even up to 8266MHz still shocked us. A lower voltage setting comes with less heat generated, so this spec of DDR5 gaming memory can see a relaxed OC use with a more mainstream motherboards as a budget choice.
The article was originally posted on the WeChat Official Account of KingBank in Chinese; the English version was excerpted.
Original article link: https://mp.weixin.qq.com/s/R-RveJ1t_BhgQsR6EOjSrQ
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