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Very nice, but you can’t buy ddr5 right now so … enjoy that fancy processor? Edit: Holy cow, you can use ddr4!
by op00to 5y ago
Very nice, but you can’t buy ddr5 right now so … enjoy that fancy processor?
Edit: Holy cow, you can use ddr4!
- Shosty123 5y agoYou can get Z690 DDR4 boards. That's what I had to resort to so we could test our software on the i5-12600k. Getting a CPU cooler with an LGA 1700 compatible bracket was actually the hardest part.
- cyber_kinetist 5y agoOne downside of this current Alder Lake release might be the fact that the Z690 motherboards are much more expensive than the AMD's current mainstream motherboards. The CPU might be a tad cheaper but overall it might not be worth it (well, until more affordable motherboards appear).
- InvaderFizz 5y agoAlderlake supports DDR4 and the performance difference is minuscule. The downside of LGA 1700 is that budget boards don't exist right now. You can pick up a B550 board any day of the week for under $100, sales as low as $60. Z690 is all $200+. The Z690 is a nicer platform for sure, especially for peripheral connectivity.
- 5e92cb50239222b 5y ago> the performance difference is minuscule I thought DDR5 brought a 2× increase in throughput? It didn't help that much, it seems?
- InvaderFizz 5y agoThe timings on DDR5 are very loose right now. Don't expect much real gains for another year or two as it matures. If you have a specific task that is extremely memory bandwidth constrained, it's great. But then again, you are probably looking at something with 8 channels if it is that big of an issue to you.
- jquery 5y agoI'm using 8-channel DDR4-3200. Would I get any benefit from 4-channel DDR5-5xxx? Is 8-channel DDR4-3200 roughly equivalent to 4-channel DDR4-6400, or am I missing something?
- InvaderFizz 5y agoYou're not missing much. Alder Lake (2ch DDR5-4800) achieved pretty impressive memory bandwidth, but it is still eclipsed by 4ch DDR4-3200 on Threadripper. If you could get 2ch DDR5-6400, it would be the same bandwidth as the TR4. What I don't understand well enough to know the impacts, is how latency plays into specific workloads. 2ch Alder lake is about 70GB/s[0] 4ch Threadripper is about 85GB/s 8ch/64c Threadripper Pro/Epyc is about 140GB/s[1] 0: https://hothardware.com/reviews/intel-12th-gen-core-alder-lake-cpu-review?page=2 https://hothardware.com/reviews/intel-12th-gen-core-alder-la... 1: https://www.anandtech.com/show/16805/amd-threadripper-pro-review-an-upgrade-over-regular-threadripper/8 https://www.anandtech.com/show/16805/amd-threadripper-pro-re...
- kllrnohj 5y agoIt's less than 2x when you factor in the mature DDR4 that greatly exceeds jedec specs vs. the immature ddr5 that's sort of at bare minimum. Eventually ddr5 will outpace DDR4, but right now it's the awkward transition time. Not unlike early DDR4 vs. ddr3
- redisman 5y agoEventually yes but the kits available right now are not very impressive. Early adopter tax definitely. You’ll probably get at least 2x faster memory kits eventually, I’m not sure how high DDR5 can scale
- Dylan16807 5y agoMemory throughput doesn't have a huge impact on performance in most desktop scenarios, and right now DDR4 is easily 3600MHz while DDR5 is 4800/5200. 4800MHz DDR4 even seems to be cheaper than 4800MHz DDR5.
- op00to 5y agoWoah! I can use my existing ddr4 memory? I didn’t even research it after seeing ddr5 was unobtanium! Thank you!