The Intel 12th Gen Core i9-12900K Review: Hybrid Performance Brings Hybrid Complexity
by Dr. Ian Cutress & Andrei Frumusanu on November 4, 2021 9:00 AM ESTCPU Benchmark Performance: DDR5 vs DDR4
Traditionally we test our memory settings at JEDEC specifications. JEDEC is the standards body that determines the requirements for each memory standard. In this case, the Core i9 supports the following aligning with those standards:
- DDR4-3200 CL22
- DDR5-4800B CL40*
There's an * next to the DDR5 for a couple of reasons. First, when asked, Intel stated that 4800A (CL34) was the official support, however since the technical documents have now been released, we've discovered that it is 4800B (CL40). Secondly, 4800B CL40 technically only applies to 1 module per 64-bit channel on the motherboard, and only when the motherboard has two 64-bit slots to begin with. We covered Intel's memory support variants in a previous article, and in this instance, we're using DDR5-4800B memory in our testing.
As explained in our SPEC section, DDR5 memory not only brings bandwidth improvements but also the increased number of channels (4x32-bit vs 2x64-bit) means that the memory can be better utilized as threads pile on the memory requests. So while we don't see much improvement in single threaded workloads, there are a number of multi-threaded workloads that would love the increased performance.
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5j3rul3 - Thursday, November 4, 2021 - link
Great step for intelBobbyjones - Thursday, November 4, 2021 - link
Indeed. Biggest improvements since sandybridge. If you look at the timeline, this wouldve been the first CPU designed since they saw Zen 1. This is their Zen 1 moment and they already took the performance crown back basically across the board and at a lower price. AMD is now on the back foot, and it will be another whole year before Zen 4, and the thing is, Zen 4 isnt even competing with Alder Lake, Raptor Lake is rumored to be out before Zen 4. AMD has really screwed up with their launch cycle and given Intel so much room that they not only caught back up but beat them. Intel is truly back.Netmsm - Thursday, November 4, 2021 - link
For now Threadripper has the performance crown.With this performance per watt, Intel can just win the market for PCs.
Enterprise will never accept this performance per watt! So, AMD wins the high profitable enterprise market.
12900k guzzles power up to 241! whereas 5950x consumes half!
Considering power consumption, it's like a Pyrrhic victory for Intel.
fazalmajid - Thursday, November 4, 2021 - link
The HEDT market in Enterprise is workstations, which run certified apps like AutoCAD and has a lot of inertia. The first real Zen workstation is the Lenovo P620 and it only recently came out, so AMD hasn't conquered that market yet. Most actual Enterprise desktops are compact models that typically run on laptop CPUs.DominionSeraph - Friday, November 5, 2021 - link
And Intel has AMD beat for miles in system validation.My 3950X on a x570 Phantom Gaming X has major issues with disk access across one NVMe, one SATA SSD, and two HDDs. Some things will start up fine, but some things will just HANG. Deus Ex loading screens take like 10 seconds. I just tried to play a video off my NVMe and it took ~15 seconds for it to launch MPC-HC. (further launches are fine.) MeGUI takes 15 seconds to launch.
This thing is just frustratingly slow in general desktop tasks compared to my old i7 4790.
Does it beat the pants off the 4790 in heavily multithreaded crunching? Yes. But iAMD does not put out a quality product.
Gothmoth - Friday, November 5, 2021 - link
anecdotal evidence? ....YOU have issues with your system.well we have 16 core ryzen and threadripper 32 & 64 core systems at work and we can´t complain.
it´s not as if intel is issue free (and i am not taking about security flaws).
when you have such grave issues.. YOUR system has issues.
probably a bad setup. i did not hear that starting MPC needs 15 seconds when i read abourt AMD systems.
dotjaz - Sunday, November 7, 2021 - link
What about USB issues that are publicly acknowledged AND multiple BIOSes claim to have fixed it, yet here we are.Netmsm - Friday, November 5, 2021 - link
It is your problem not AMD nor Intel!This is why we always refer to QVL of MB before buying RAM, SSD, etc. to avoid such problems. It is not AMD prerogative rather it is for all platforms.
For now you may better update MB bios as soon as it is released. To solve the problem completely you need to reassemble it according to the MB's QVL.
DominionSeraph - Friday, November 5, 2021 - link
It is an AMD issue. I've put together hundreds of Intel systems and none of them have any issues.Netmsm - Friday, November 5, 2021 - link
When you face abnormality just put your cards on the table and ask a pro.