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AMD officially confirms fresh next-gen Zen 6 CPU details
- magicalhippo 10mo agoWill be interesting to see how long this RAM insanity will last. If it doesn't calm down before Zen 6 releases, people like me on older platforms might just have to skip Zen 6 entirely and wait for the AM6 platform.
- Pet_Ant 10mo agoHigher DRAM prices might mean that there is less demand from new system builders mean depressed prices so it might be more tempting to upgrade your existing AM5 CPU to Zen 6
- Ritewut 10mo agoI would figure the opposite. There are plenty of people like me staying on AM4 because of the RAM price increases. I will probably skip AM5 entirely.
- 0cf8612b2e1e 10mo agoI am a hypocrite, but there is really not that much need to upgrade CPUs anymore. Even a ten year old chip seems completely adequate for day to day use. I played with a N100 recently and those things are incredibly capable. (Ignore my AM5 workstation with 192GB RAM in the corner)
- imtringued 10mo agoYou say that, but DDR6 will double the memory bandwidth over DDR5. This means modern systems will go beyond 200GB/s memory bandwidth just for the CPU alone.
- 0cf8612b2e1e 10mo agoAnd? What real world impact will that have for people typing up an email and browsing the web?
- glitchc 10mo agoIt majes a huge difference for local AI models.
- kvemkon 10mo ago> DDR6 will double the memory bandwidth over DDR5 Considering PC desktops. DDR4 is 3200 MT/s max JEDEC. DDR5 is available on AMD since 3 years and is 5600. DDR6 specification is almost finished. It looks like DDR5 will double performance just right before new DDR6 DIMMs appear. Thus I'd expect DDR6 to double the bandwidth just as late when the new memory standard arrives.
- yetihehe 10mo ago> DDR5 is available on AMD since 3 years and is 5600 Strange, I bought 64GB DDR5 6400MHz last year and apparently my motherboard can handle up to 7200MHz (or more with overclocking).
- kvemkon 10mo agoThough clarified at the start about Desktop, but missed JEDEC applying, of course, generally for the whole post.
- wtallis 10mo agoAMD's CPUs don't support more than 5600 MT/s without overclocking; they're still using the same IO die from Zen 4, so their memory controller is pretty outdated. Zen 6 should introduce a new IO die with a better memory controller, but for now 6000 MT/s is the fastest reasonable memory overclock for AMD desktops. Intel's desktop CPUs from last year support up to 5600 MT/s with regular DDR5 DIMMs, or 6400 MT/s for CUDIMMs. Speeds higher than this are achievable, but are overclocking. If your memory modules are rated for 6400 MT/s, they are most likely advertising the speed when using an Intel XMP or AMD EXPO profile to overclock the memory (and the CPU's memory controller). The JEDEC standard profile likely is no faster than 5600 MT/s. It's also possible that you bought last year a kit of CUDIMMs rated for 6400 MT/s without overclocking, brand new to the market at that time, and of no help whatsoever with any CPU that isn't an Intel Arrow Lake.
- bikelang 10mo agoI rocked my Haswell i5 until last year when I built a brand new machine around the 9800x3d. Along the way I upgraded it from 8gb of ram to 32gb, got a gen 1 pcie3 NVME, and went through successive hand-me-down GPUs starting from a GeForce 770 to the RTX 2070 it has now. In fact my wife is still rocking that machine - although her gaming needs are much less equipment intense than mine. After a small refurb I gave it (new case, new air cooler, new PSU) - I expect it to last another 5 years for her.
- ocdtrekkie 10mo agoI rode out an i7-4790K until this year... replaced solely because of Windows 10 support ending. But it's a solid chip. My new one is a 9700X. Didn't feel the need to spring for higher power budget for a marginal gaming performance bump. But I suppose that also means it's much more practical for me to jump to a newer CPU later.
- snvzz 10mo agoSimilarly, went from i7-4790K with 32GB RAM to 9800x3d with 96GB ECC RAM. It's faster than the prior machine, but it sure does not feel like it does things the previous one didn't
- ocdtrekkie 10mo agoHeh I also only sprung for 32 GB of RAM this time, which is still double my 4790K's 16 GB. But I don't use Chrome so RAM doesn't get used that heavily. ;) I think it's very telling so many people upgrading now are coming from Haswell chips, they are a legendary chip generation, and arguably the last time anyone needed a CPU upgrade short of operating system support or warranty concerns.
- snvzz 10mo ago>short of operating system support Notably, Haswell makes the cut for Win11. Not that I'd use that over Linux. (I run Arch, btw)
- Sohcahtoa82 10mo agoDepends wildly on what you're doing. I'm a gamer, often playing games that need a BEEFY CPU, like MS Flight Simulator. My upgrade from an i9-9900K to a Ryzen 9800X3D was noticeable.
- johnbellone 10mo agoI really wish I would've bought 192G when it was less than a few thousand dollars!
- 0cf8612b2e1e 10mo agoHeh. It was a luxury purchase at the start of the year when I was only worried about tariffs. Wanted to lock in a new build good for years. Every once in a while I have a machine learning project that needs over 100GB and so it is nice not to have to overthink things. Honestly, I’m kicking myself I did not go all the way with 256GB.
- ciupicri 10mo agoI assume you're using 4 modules of memory, so the while the capacity is high, the bandwidth is low.
- nopesayer 10mo agoLow being relative. 6000 C28 at 256GB using 4x64 is not at all on the bandwidth high end these days, but it's way more than DDR4 could provide. Most boards support 4x64 at 5600+ now, some go to 6400 with it if you tune voltages and terminations. .
- pjjpo 10mo agoHad been running a coffee lake refresh 4 core for several years and as interested as I was in new platforms, especially AM5, the work of replacing motherboard never felt worth it. Now with the ram wars heating up, I just committed to that by picking up a used top-end 8 core coffee lake for $50 to cut a few seconds off my vulkan shader compiles with minimal replacement effort.
- Pet_Ant 10mo agoBut they are still gonna fab the Zen 6 chips. So for people already with AM5 motherboards populated with RAM but rocking a Zen 4 CPU this could be a good time to upgrade that CPU with your existing setup. You passing this generation just means less competition for those CPUs which should make them even cheaper.
- Macha 10mo agoMy understanding is they’re using the same process time for cpus and gpus so they may just be able to reallocate it for datacenter gpus. Sure they’re behind but some of the AI companies have already made deals with them as they just want compute, any compute. So I think the effect might be less than some hope for
- PunchyHamster 10mo agoand do what, buy now-hideously expensive DDR6?
- Ritewut 10mo agoA socket change does not correspond with a RAM change. Intel has had like 10 sockets in DDR4 including their newest socket.
- parineum 10mo ago> less demand from new system builders mean depressed prices Only if they overestimate demand and overproduce CPUs. Otherwise it will lead to higher prices because there's less economy of scale.
- FootballMuse 10mo agoReportedly, Zen 7 will also be on AM5. https://overclock3d.net/news/cpu_mainboard/amd-extends-am5-lifespan-with-zen-7-ryzen-support-rumour/ https://overclock3d.net/news/cpu_mainboard/amd-extends-am5-l...
- rafaelmn 10mo agoCan they double the memory lanes without switching socket ? If not I feel like PC is going to fall behind even further compared to Apple chips. Having ram on chip sucks for repairability but 500gb/s main ram bandwidth is insane. They stumbled into the right direction with strix halo but I have a feeling they won't recognize the win/follow up.
- dogma1138 10mo agoNot easily, and you will need a new motherboard anyhow because each of the 2 slots you can have per lane are wired in tandem.
- Numerlor 10mo agoThe socket io locks in the amount of memory channels. Some pins could be repurposed but that's pretty much a new socket anyway. They could in theory do on package dram as faster first level memory, but I doubt we'll see that anytime soon on desktop and it probably wouldn't fit under the heat spreader
- dogma1138 10mo agoThey already do the latter with X3D. You won’t be able to add RAM to the die itself there no room on the interposer really.
- zamadatix 10mo agoThe "insane" RAM bandwidth makes sense with Apple M chips and Strix Halo because it's actually "crap" VRAM bandwidth for the GPU. What makes those nice is the quantity of memory the GPU has (even though its slow), not that the CPU has tons of RAM bandwidth. When you go to the desktop it becomes harder to justify including beefed up memory controllers just for the CPU vs putting that towards beefing some other part of the CPU up that has more of an impact in cost or performance.
- XCSme 10mo agoI hope they'll release a new AM4 CPU Something like 5900x on 2nm or 4nm
- burnt_toast 10mo agoHopefully it settles down soon. DDR4 prices are climbing now as well since more people are sticking with it. I'd love to build a new desktop soon but I couldn't justify the cost and am instead building out a used desktop that's still on ddr4 / lga1151.
- nottorp 10mo agoHoly ram prices man! I just checked how much the 64 Gb ddr4 in my desktop would cost now... it starts at 2.5 times what i paid in 2022. Sorry AMD, I would maybe like a new desktop but not now.
- TwoNineA 10mo agoI hope for a little more PCIe lanes so I can run 2 gaming VMs on these and upgrade my old Threadripper.
- dogma1138 10mo agoThere is fuck all difference between x8 and x16 for gaming. Heck with PCIe5 even dropping to x4 is borderline noticeable outside of benchmarks.
- Sohcahtoa82 10mo ago100% this The PCI-Express bus is actually rather slow. Only ~63 GB/s, even with PCIe 5 x16! PCIe is simply not a bottleneck for gaming. All the textures and models are loaded into the GPU once, when the game loads, then re-used from VRAM for every frame. Otherwise, a scene with a lowly 2 GB of assets would cap out at only ~30 fps. Which is funny to think about historically. I remember when AGP first came out, and it was advertised as making it so GPUs wouldn't need tons of memory, only enough for the frame buffers, and that they would stream texture data across AGP. Well, the demands for bandwidth couldn't keep up. And now, even if the port itself was fast enough, the system RAM wouldn't be. DDR5-6400 running in dual-channel mode is only ~102 GB/s. On the flip side the RTX 5050, a current-gen budget card, has over 3x that at 320 GB/s, and on the top end, the RTX 5090 is 1.8 TB/s.
- rowanG077 10mo agoYou are correct that games generally are not PCIe limited. But you are incorrect that games just upload everything ones and be done. Most modern engines are most certainly streaming in and out assets all the time.
- deleted 10mo ago[deleted]
- nineteen999 10mo ago> All the textures and models are loaded into the GPU once, when the game loads, then re-used from VRAM for every frame. Otherwise, a scene with a lowly 2 GB of assets would cap out at only ~30 fps. Ah, not really these days, textures are loaded in/out on demand, at multiple different mipmap levels, same with model geometry and LOD's. There is texture and mesh data frequently being cached in and out during gameplay. Not arguing with your points around bus speeds, and I suspect you knew the above and were simplyifing anyway.
- pmontra 10mo ago"7 GHz clock speed" When did the GHz race start again?
- muro 10mo agoRumors = the author just made something up
- ziml77 10mo agoSimilarly: Leaks = the author just made something up, but now it ranks extra highly when someone searches for "[upcoming thing] leaks"
- Sohcahtoa82 10mo agoI hate the term "leak". It used to have meaning. Now, it's either a fancy term for "announcement", or people use it synonymously with "rumor".
- bikelang 10mo agoI remain quite skeptical of that. Maybe on a purpose built overclocking rig :^)
- kvemkon 10mo agoYeah, first of all we need to get 6 GHz with Zen 6.
- phire 10mo agoIt never stopped. Just takes backwards steps from time to time with major architectural innovations that deliver better performance at significantly lower clock speeds. Intel's last backwards step was from Pentium 4 to Core all the way back in ~2005. AMD's last backwards step was from Bulldozer (and friends) to Zen in 2017. 7GHz is ridiculous and probably just a false rumour, but IMO; Intel and AMD are probably due for another backwards step, they are exceeding the peek speeds from the P4/Bulldozer eras. And Apple has proved that you can get better performance at lower clock speeds.
- bikelang 10mo agoI’m sure there are a plethora of technical reasons it’s impractical - but my dream is a big, unified L3 cache across their CCD chiplets. Maybe 256mb in size for the x950 x3d chips.
- hedgehog 10mo agoThere are challenges with really big monolithic caches. IBM does something sort of like your idea in their Power and Telum chips, with different approaches. Power has a non-uniform cache within each die, Telum has a way to stitch together cache even across sockets (!). https://chipsandcheese.com/p/telum-ii-at-hot-chips-2024-mainframe-with-a-unique-caching-strategy https://chipsandcheese.com/p/telum-ii-at-hot-chips-2024-main... https://www.eecg.utoronto.ca/~moshovos/ACA07/projectsuggestions/ieee_micro04_nuca.pdf https://www.eecg.utoronto.ca/~moshovos/ACA07/projectsuggesti... (if you do ML things you might recognize Doug Burger's name on the authors line of the second one)
- wmf 10mo agoThey could bond multiple CCDs on top of a single large unified L3 die (similar to MI300C) if they wanted to. I've seen no rumors about that though.
- guywithahat 10mo agoI'm currently cache limited by my work and I share your dream
- kvemkon 10mo ago> This increases the maximum core count per chiplet from 8 to 12. Furthermore, it increases the L3 cache per CCX/CCD from 32 MB to 48 MB. I'd say the amount of L3 is not increased but adapted/scaled to the increased core count, since per each core there is still the same amount of cache available as before. We get faster cores, so we need to get from 5600 to e.g. 6000 DDR5. Since core count is increased by 50%, we'd need 9000... DDR5^W, well yes, we'd need actually as planed before AM6 and DDR6!
- wtallis 10mo agoThere are already DDR5 CUDIMMs at and above 8000 MT/s, and 9600 MT/s has been demonstrated but none are currently in stock. By the time AMD ships Zen 6 desktop processors, the market should be ready with memory modules that will mean even the highest core count Zen 6 parts will be at worst only slightly more bandwidth-starved than their predecessors. And the lower core count Zen 6 CPUs with a single CCD should be able to provide substantially more bandwidth than their predecessors. All without requiring DDR6 yet.
- charleshn 10mo agoThey should be reintroducing the 3D vcache [0] variants (X) in EPYC, with a higher cache/core ratio, that was present in EPYC4 (e.g. 9684X [1]) they for some reason wasn't available in EPYC5. Makes a massive difference at high density and utilisation, with the standard cache/core performance can really degrade under load. [0] https://www.amd.com/en/products/processors/technologies/3d-v-cache.html https://www.amd.com/en/products/processors/technologies/3d-v... [1] https://www.amd.com/en/products/processors/server/epyc/4th-generation-9004-and-8004-series/amd-epyc-9684x.html https://www.amd.com/en/products/processors/server/epyc/4th-g...
- Havoc 10mo agoWell with the way ram is going my next buy may well land on zen 6/ddr6/pcie6
- snvzz 10mo agoBy the time Zen6 launches, there will already be RVA23 chips in the market. x86 releases will never again be as interesting.