Why G.SKILL's "Fastest" DDR5 memory isn't their best

G.Skill's 6600 MT/s memory is better than their 6800 MT/s modules


There's more to memory speeds than clock speeds alone  

G.Skill has just revealed new DDR5 6800 MT/s memory kits, only a week after revealing the "world's fastest" DDR5 memory, which offered 6600 MT's speeds. 

What? Isn't 6800 MT/s faster than 6600 MT/s? Why didn't G.Skill reveal their 6800 MT/s last week with their "world's fastest" claim? The short answer is "It's complicated", and the long answer is that there's more to memory speeds than MT/s rates or clock speeds alone. 

Are G.Skill's 6600 MT/s modules faster? 

Yes, and no. In terms of clock speeds and MT/s rates, G.Skill's 6800 MT/s modules are "faster", but when DDR5 latencies are factored in, G.Skill's 6600 MT/s modules are "faster". 

G.Skill's Trident Z5 DDR5-6600 modules can offer users tight CL timings of 36-36-36-76, whereas G.Skill's Trident Z5 DDR5-6800 can ship with CL timings of  CL38-38-38-76 or CL42-42-42-76. The fastest DRAM modules offer tight timings and fast MT/s speeds, making G.Skill's 6800 MT/s memory more latent than G.Skill's latency optimised 6600 MT/s modules

CL timings are the time it takes for DRAM to respond to certain scenarios. Lower CL timings are better, but these timings are counted in terms of clock cycles, not real-world time. IE, a CL timing of 18 with 3200 MT/s DRAM is the same as a CL timing of 36 when 6400 MT/s memory is used. 

In latency-sensitive scenarios, G.Skill's CL36-36-36-76 6600 MT/s memory will be faster than G.Skill's DDR5-6800 modules. This can result in higher framerates in games, faster operations in workstation applications and an overall faster PC experience. While DRAM with higher clock speeds (or MT/s rates) are preferred, lower latency memory is what will deliver the highest performance levels in many scenarios. 

Below is G.Skill's Press Release about their new DDR5-6800 Trident Z5 memory modules. 


PR - G.SKILL Reaches New Extreme Speed at DDR5-6800 with Trident Z5

G.SKILL International Enterprise Co., Ltd., the world’s leading manufacturer of extreme performance memory and gaming peripherals, is delighted to announce yet another extreme speed DDR5 memory kit at DDR5-6800 32GB (2x16GB), designed for the latest 12th Gen Intel® Core™ desktop processors and Intel® Z690 chipset motherboards. Thus far, this is the world’s fastest DDR5 memory kit to reach such a high frequency speed and raise DDR5-enabled system performance to new heights.

Raising the Memory Performance on 12th Gen Intel® Core™ Desktop Processors & Intel® Z690 Chipset

“Intel worked closely with G.SKILL on the development and enablement of the DDR5 overclocking ecosystem to deliver high performance computing experiences to PC users,” said Mandy Mock, Vice President and General Manager of Desktop, Workstation and Channel Group, Intel. “It’s exciting to see G.SKILL’s new lineup of high frequency memory that takes advantage of the innovation and performance we’re delivering with the new 12th Gen Intel Core desktop processors and Intel Z690 chipset.”

“G.SKILL is dedicated to develop ever-faster overclocking memory on each new generation of Intel platform. And we are very excited to have worked with Intel to develop extreme performance DDR5 memory for the latest Intel Z690 platform,” says Tequila Huang, Corporate Vice President of G.SKILL International. “With G.SKILL extreme memory kits, we hope to tap into the performance potential of DDR5, and in conjunction with the latest Intel platform offering, to bring a whole new level of system performance to worldwide gamers, overclockers, and enthusiasts.”


Low Latency on Extreme Speed DDR5-6800

In the never-ending quest for memory performance, G.SKILL is excited to reveal the latest additions of ultra-high frequency DDR5 memory to the flagship Trident Z5 family. Reaching an astonishing memory frequency of DDR5-6800, these two upper echelon memory specifications are the ultimate memory choice for gamers, enthusiast, and overclockers.

The screenshot above shows the extreme memory kit running at DDR5-6800 with an ultra-low latency of CL38-38-38-76.

The next screenshot shows a second memory kit running at DDR5-6800 CL42-42-42-76.

Why G.SKILL's   

Supports Intel XMP 3.0 Extreme Memory Profile

Just set and go. The latest G.SKILL overclocking DDR5 memory kits are programmed with the latest Intel XMP 3.0 profiles, the only thing between you and extreme memory performance is a simple setting. Additionally, XMP 3.0 enables two customizable user-defined profiles to be saved in the memory module via BIOS on supported motherboards, so your fine-tuned memory settings go wherever the modules go.

You can join the discussion on G.Skill's 6800 MT/s DDR5 memory modules on the OC3D Forums

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Most Recent Comments

28-10-2021, 21:51:05

"ultra-low latency of CL38-38-38-76"

That's nightmare fuel, I hope the optimisations have a significant effect. Otherwise it's getting spanked by mid tier DDR4 in terms of latency.Quote

29-10-2021, 02:07:19

Originally Posted by looz View Post
"ultra-low latency of CL38-38-38-76"

That's nightmare fuel, I hope the optimisations have a significant effect. Otherwise it's getting spanked by mid tier DDR4 in terms of latency.
Not always true. Every generation of DDR has increased the CL timings yet latency has been reduced or maintained parity. CL timings are not the end all be all there's more to memory than just timings.


Here you can see equal latencies with equal CL timings yet double the bandwidth at virtually every increase between ddr4 and ddr5. Even the worst DDR5-6400 timing set at 56-56-56 is only a few nanoseconds slower than DDR4-3200 at the fastest possible A standard. Moving that DDR5-6400 timing set to A standard is only a .63 nanoseconds increase over the 3200kit but at double the bandwidth so if you have a kit that's not lower than 22 timings it's actually slower or on par if you follow the jedec standard.

Mid tier ddr4 is higher latency than that best case scenario kit, as is ddr5 but that's a normal trend. Overall in consumer applications raw bandwidth per clock is more beneficial. Only in certain scenarios would latency by be super important. But the people buying for that market no far better than we do why they need ultra low latency over raw bandwidth.Quote

29-10-2021, 04:26:41

I don't consider 3200 CL22 mid tier at this point, that's fairly slow. 3200 CL17 is available for cheap, seems that DDR5 only brings a bandwidth advantage at a price premium initially. Current XMP to XMP is IMO the most realistic comparison - not initial JEDEC standards.

Also, I've found latency to be a significant factor when chasing best frame time percentiles, which is the most important metric for smooth gameplay. Especially for single core bound Dx9 games which tend to choke with lots of action (cough CSGO).Quote

29-10-2021, 05:13:40

Never said it was mid tier.

Also your point proves itself wrong over time, it's slow in your opinion now. It wasn't at launch. Which is what we must compare it to because that's all ddr5 has. Once ddr5 matures it'll be much faster with tighter timings bringing us back in line with a late generation ddr4 vs ddr5 latency comparison. The fact it's already not far off while giving us all the benefits it brings to the table is impressive they maintained the normal parity of latency between generations (given it's the biggest leap in decades).Quote

29-10-2021, 05:20:06

I am definitely not claiming that DDR5 won't catch up - but it's likely a poor value proposition for 12th gen. And they haven't maintained the parity.Quote

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