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Tested: DDR4 vs DDR5 for Alder Lake

Bond007

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A bit more complete testing of DDR4 vs DDR5 for Alder Lake (compared to some others out there). The only thing I wish it had was DDR5 tested at a more mainstream freq.

https://www.techpowerup.com/review/intel-core-i9-12900k-alder-lake-ddr4-vs-ddr5/

"Intel memory controllers aren't very picky about dual-rank modules, at least while you stay in Gear 1. In our performance results, Dual-Rank DDR4 Gear 1 at DDR4-3200/3600 is able to stay ahead of their DDR4-4000/4400 single-rank Gear 2 counterparts. In conclusion, you could avoid paying the hefty DDR5 early-adopter tax if you're willing to live with a single-digit percentage performance hit in applications, and a negligible hit in gaming performance. On the other hand, if you want the absolute highest performance, DDR5 is what you want, but be ready to pay for it."

You can read through for specific application or game (at various resolutions) performance, but here are a couple as a summary (all scores with just the RAM speed listed are with the 12900K):

relative-performance-cpu.png


relative-performance-games-2560-1440.png
 

r0k0

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what is gear 1 and gear 2 ?

i am looking for ram currently since i manage to pick up a 12900kf and z690 hero board... just no ram yet :(
 

Bond007

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Jun 24, 2009
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what is gear 1 and gear 2 ?

i am looking for ram currently since i manage to pick up a 12900kf and z690 hero board... just no ram yet :(
Memory controller speed. Gear one is 1:1 (same as ram freq), gear two is 2:1 (memory controller at half the speed of ram freq). I think anything above 3600 requires gear 2. So you are better off with tight timing 3600mhz ddr4, then faster ddr4. DDR5 all runs gear 2.
 

r0k0

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Folding Team
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Mar 10, 2007
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Gatineau, Quebec
ah gotcha, well i cant do ddr4 on the board i got, its only ddr5. where do we find ram ? Canada computers doesnt have ddr5 listed lol
 

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