Monday, January 23rd 2023
AMD Product Pages Say Upcoming 7950X3D and 7800X3D "Unlocked for Overclocking"
The product pages of the upcoming AMD Ryzen 9 7950X3D and Ryzen 7 7800X3D "Zen 4" processors went online, which say that the two chips are unlocked for overclocking. This normally implies that the processor has an unlocked base-clock multiplier, which makes it easy to overclock. The previous-generation Ryzen 7 5800X3D processors came with locked base-clock multipliers, making them complicated to overclock. Both the 16-core/32-thread 7950X3D and the 8-core/16-thread 7800X3D come with a TDP rating of 120 W, which for the 7950X3D is significantly lower than the 170 W that the 7950X is rated at. It's also worth noting that the T-junction max (TJmax) value is lower, at just 89°C, compared to 95°C of the 7950X and 7700X.
Slated for a February 2023 market release, the two chips introduce stacked 3D vertical cache technology (3DV cache). The 7800X3D comes with 64 MB of 3DV cache stacked on top of the 32 MB of on-die L3 cache, taking its L3 cache size to 96 MB, and total cache (L2+L3) to 104 MB. On the other hand, the 7950X3D and the 12-core/24-thread 7900X3D only come with the 3DV cache memory on one of the two "Zen 4" CCDs. The first CCD has 96 MB of L3 cache (including the 3DV cache), while the second CCD is a standard "Zen 4" CCD with just 32 MB of on-die L3 cache. For these chips, the L3 cache adds up to 128 MB, and total cache to 140 MB for the 7900X3D, and 144 MB for the 7950X3D.
Update Jan 24th: AMD updated their product pages to remove this field altogether. It looks like we'll have to wait a bit for AMD to finalize its specs.
Source:
HXL (Twitter)
Slated for a February 2023 market release, the two chips introduce stacked 3D vertical cache technology (3DV cache). The 7800X3D comes with 64 MB of 3DV cache stacked on top of the 32 MB of on-die L3 cache, taking its L3 cache size to 96 MB, and total cache (L2+L3) to 104 MB. On the other hand, the 7950X3D and the 12-core/24-thread 7900X3D only come with the 3DV cache memory on one of the two "Zen 4" CCDs. The first CCD has 96 MB of L3 cache (including the 3DV cache), while the second CCD is a standard "Zen 4" CCD with just 32 MB of on-die L3 cache. For these chips, the L3 cache adds up to 128 MB, and total cache to 140 MB for the 7900X3D, and 144 MB for the 7950X3D.
65 Comments on AMD Product Pages Say Upcoming 7950X3D and 7800X3D "Unlocked for Overclocking"
*Watercooling or LN2 required....:laugh:
*Watercooling or LN2 required....
I don't think there's much to overclock, unless you just run few benchmarks with LN2....
as for OC ... well, never bothered to OC my R5 3600, last OC CPU was on my previous 6600K and it did not end well, even with a mild OC that ultimately got wrecked by M$ and Intel (no workaround worked sadly)
all OC prior to the 6600k were fun ... Socket 7, Super 7, 939, 940, AM2, AM3, FM2/FM2, S775, S1366 even FS1b (aka AM1, yeah my Athlon 5350 was indeed overclocked )
I was sure I saw a tweet from AMD official that the X3D Zen4 chips would still be locked...
i just wait a bit until someone reviews about it :)
Start my new job next week too :)
:D
But if it is increased to 95-100 degrees from the motherboard, it is different. For 7950X3D it may be at 420mm.
Maybe with a little voltage adjustment the heat will stay under control.
7800X3D looks amazing tho.
Edit, that could be the case only for the big chip. I guess we have to wait.
With the dual-CCD models having on non-vCache CCD, it would make sense that one CCD can OC like any other Zen4 so far, and the vCache CCD is the restricted one.
The 7800X being a single CCD with overclocking is the first time info from AMD has conflicted. I'm trying to find the tweet or r/AMD official post that said Zen4 3DvCache chiplets wouldn't be overclockable - which isn't incompatible with a dual-CCD model being overclockable on the other, regular CCD.
I don't actually have any X3D chips, though I'll probably dump one in my home rig to give it a cheap boost rather than forking out for Zen4 or Raptor Lake.