Cache on 6cores? No thanks
Unfortunately, this deal has expired 4 May 2023.
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16 Posted 2 March 2023
AMD Ryzen 9 7900X3D Processor - £614.99 @ Ebuyer
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Yeah the 7900X3D is a hard sell. 7800X3D and 7950X3D both have 8 cores with 3D cache but this in-between part has only 6 at a premium price. (edited)
The prices of AM5 from the motherboards to the CPU's, it's been disappointing to say the least.- Its the one nobody wants. It's the CPU equivalent of the 7900XT.
It's not really the same as the 7900XT, because at least that can have the price reduced. What can they do with the 7900X3D? Make it cheaper than the 7800X3D? So you have the faff with the CCD allocation, AND it has less cache cores than both the tiers above and below it. I'd have thought it'd make more sense to make a simple 7600X3D if they just want the 6 cores, but I'm sure AMD have their reasons. (edited) 
This is a lesson about never buying the 'bleeding-edge'. I'd be very unhappy at AMD'[s price, but with their fantastic 5000 series at mindblowing discounts, at least the CPU side plays fair, only gouging the early adopters with no patience, and more money than sense.
Now consider the GPU market, where the last gen gets no discounts at all (either from AMD or Nvidia- and please don't quote the gouging launch crypto-price of the 6900 and 3090 boards- those were never real gamer prices). The 3070/3080/6700/6800 are still sold above retail launch.
Remember, we are in an historic downturn, where every tech product save for a few top skews is going to get cheaper and cheaper across this year. Do not be fooled by the price of this CPU- it is aimed at 'whales' and should halve by years end (AMD's 12-core CPUs are in a very weird place- they make zero sense for heavy users or gamers).
7800X3D will be the best for gaming as not reliant on the scheduling software(s) to park the cores to make use of the cache ccd. (edited)- The launch of these CPUs are a mess
Great to see them trying new things.
Not sure why they thought software scheduling was a good idea though.
Personally I’m just going to get a 5800x3d when they drop a bit further, and hopefully that will be fine until whatever comes after AM5. Have watched the reviews for these new am5 cpus and they just seem quite underwhelming to me, considering the cost to go from AM4>AM5.- Great if you want to play at 1080p for 600fps, otherwise you can pay 1/3 the price for negligible difference in gaming performance. It may be a better choice when GPU get bottlenecked, but that will be at least 6 years away. (edited)
AM5
the worst generational leap in real world usage for most users to date.
Yet still uses half the power of the rapter lake CPU's from intel for better gaming performance.
These 'simulated' 7800X3D tests (by disabling cores and assigned cache) gives tremendous results in many games with very high power efficiency. It should turn out at least as fast a a 13900K over a wide average of modern games while using way less power. I think that's the chip people waiting to go onto AM5 care about most.
The only reason I'm collecting parts awaiting this chip next month despite the high cost of AM5 is the knowledge in two or three years time I'll be able to drop in a new considerably faster CPU several generations on. Not having to do anything else to the machine. The build I create should last me 6 or 7 years this way comfortably, with a few GPU swaps. For me that doubling of lifespan makes the platform worth say another £150 on top of what I might spend if I chose the current Intel competitor.
It does, and if you need a system today it is pretty good, but with AMDs track record they'll have 8 series 12-18 months out and it'll be pretty awesome and AM5 will have gotten the price down.
I would never bet on a system last 6-7 years unless you are pretty stable in what you do with it, we're in a pretty significant inflexion point in performance.