Theoretical Capacity Of Ddr4
The slow increase in RAM prices hasn’t earned the same attention as the, but it’s another factor working directly against PC builders and the DIY market.Typically, the RAM market functions on a cadence that’ll be familiar to anyone who has been building PCs for more than a few years. At debut, a new RAM standard is often far more expensive than the mainstream standard it’s supposed to replace. Meanwhile, the new memory offers few-to-no benefits over the original in most cases, and is only clocked a little faster. Over time, the clock speed gap grows and costs on the new memory fall.
Eventually, the two standards hit parity and the older RAM starts to become more scarce. Ultimately, the new RAM typically bottoms out cheaper than the old memory. That’s the approximate story of every RAM transition for the past two decades, leaving out the RDRAM kerfuffle.
Graph and data byIt would be one thing if that kit were an outlier. The price of DDR4 has risen dramatically according to PC PartPicker at every price point and capacity level.
Sometimes you can avoid this kind of problem by picking slower SKUs or smaller capacities, but that’s not the case here. PCPP’s price index only goes back 18 months, but even the highest-end DDR4-3200 on its tracker shows similar inflation. In June 2016, you could buy 16GB of DDR4-3000 for $70; today that same RAM kit is over $200.
Sky-high Prices, With No Relief in SightIf DDR4 prices were following a standard cost curve, you’d expect faster DRAM clocks to loosely correlate with higher costs. Instead, the costs are fairly compressed below a certain point. You can buy 16GB DDR4-2133 for $168 or DDR4-3000 for $170. DDR4-3200 is selling for just (“just”) $180. Above this point, DDR4-3333 still demands a price premium, at $220, and the prices increase from that point forward. The explanation for this spiking is that mobile demand for DDR4 has stripped the market bare.
That’s possible, but LPDDR4 and LPDDR4X are not identical to DDR4, and it’s not as simple as building DDR4 and then binning it to see what kind of memory you have. And according to DigiTimes, mobile DRAM inventory levels are spiking at smartphone manufacturers, with some companies carrying 2x the load they were as weak demand for devices and skyrocketing prices bite into smartphone profit margins as well. Overall smartphone sales grew slightly in 2017, but not at the kind of meteoric rate we saw in earlier years.The “mobile is sucking up all the DRAM,” argument, in other words, seems weak. Apple is slashing its iPhone X production targets. Smartphone companies are unhappy with spikes in DRAM pricing and the way those spikes have bitten into their own profits.
And is reporting memory capacity growth is expected to be at a near-historic low of 19.6 percent in 2018, as Samsung, SK Hynix, and Micron are all cutting back on capital investments. DRAM wafer starts at all three companies are only expected to grow by 5-7 percent this year and fab expansions or new foundries take years to bring online.And those of you thinking “Ahah! I’ll buy DDR3!” aren’t going to be happy, as DDR3 prices have risen almost as much as DDR4. While still cheaper than DDR4, we can’t recommend falling back to the older RAM standard and its commensurate dependence on older CPUs — not when Spectre and Meltdown are raising questions about how long those same CPUs will last in-market when fixes are deployed. Spectre, Meltdown Could Make Things Much WorseSome analysts believe Intel’s CPU sales could spike in the back half of 2018, if companies start buying new servers to replace older hardware hit by Spectre and Meltdown.
Strong data center growth in the past few years has soaked up some DRAM capacity, but if companies were to start retiring old servers, that could hit prices even harder. Companies retiring older DDR3 servers would need DDR4 to replace them, and while the consumer market dwarfs the server space in terms of CPU shipments, servers tend to ship with a lot more RAM than their consumer system counterparts.We’d like to close this post with something optimistic. GPU prices, after all, probably will come down once the cryptocurrency boom subsides. But as far as RAM prices are concerned, we’d recommend buying only as much as you’re absolutely sure you’ll need. We can’t even recommend using slower clocks to save cash; there’s not much difference between DDR4-2133 and DDR4-3000 as far as market prices (obviously this may differ by geographical area and timing, and always check to see if prices have changed). Apart from trying to stay within an 8GB to 16GB window, there’s not much users can do.
Let say I have a single CPU namely 5930K.Intel states the max memory bandwidth is 68 GB/sConsidering:a) no overclockingb) quad channel DDR4 DIMMs (or dual channel if needed for sake of optimization. Let say I have a single CPU namely 5930K.Intel states the max memory bandwidth is 68 GB/sConsidering:a) no overclockingb) quad channel DDR4 DIMMs (or dual channel if needed for sake of optimization. Ok, that start making sense thanksNow, Corsair have tested a 4790K processor which should only be able to reach only 25.6 GB/s of max memory bandwidth. But on their test they reach up to 37GB/s. How is that possible? I understand a small% of headroom, but that is 50% more!:/On that same article, a comment even states a 40GB/s transfer rate.Most of all on that same article, what they are saying is that CL (as you said) makes no difference what-so-ever.Therefore, to summarize if I get a DDR4-2666 (64.4.2666E6) and have the mobo run it at 2666 (at whichever CL), I would achieve the full 68GB/s (approximately. Which is what they achieved on Corsair test)Lastly I would assume that, by increasing the MT/s (by OC) the bandwidth would increase proportionally, instead from the corsair article this doesn't happen.
I guess it depends on bottle neck and other hd limitations. Ok, that start making sense thanksNow, Corsair have tested a 4790K processor which should only be able to reach only 25.6 GB/s of max memory bandwidth. But on their test they reach up to 37GB/s. How is that possible? I understand a small% of headroom, but that is 50% more!:/On that same article, a comment even states a 40GB/s transfer rate.Most of all on that same article, what they are saying is that CL (as you said) makes no difference what-so-ever.Therefore, to summarize if I get a DDR4-2666 (64.4.2666E6) and have the mobo run it at 2666 (at whichever CL), I would achieve the full 68GB/s (approximately.
Which is what they achieved on Corsair test)Lastly I would assume that, by increasing the MT/s (by OC) the bandwidth would increase proportionally, instead from the corsair article this doesn't happen. I guess it depends on bottle neck and other hd limitations.Intel's advertised max data rate is based on extremely conservative constraints designed to minimize bit error rates and maximize interoperability; it is this range of configurations that Intel warranties. Higher data rates are definitely possible, but this may result in some products exhibiting a bit error rate that Intel deems unacceptable. For mission-critical applications or in servers with oodles of memory this makes perfect sense; for an enthusiast it's nothing noteworthy.There does exist a point where the column read latency will be long enough that bus cycles will end up going unused due to the memory controller being unable to track the state of the outstanding operations internally. However, I don't know what this value is with respect to Intel's current memory controller design or whether it's even within the programmable CL range for DDR4.
Many thanks for your time and patience PinheddOne more thing if you don't mind. What about the 8 DIMMs on the mobo, would they have any effect on the RAM bandwidth? I know that two DMMs per channel are usually able to maintain the MT's but as I am planning to run them at 2666 using an embedded XMP profile, would they maintain the OC MHz or will it drop to mobo/ram stock or even worse below that?
Theoretical Capacity Of Ddr4 Memory
Any experience with this? Is the Asus Deluxe.Each rank that is added to a channel decreases the impedence on the command/address bus which compromizes signal integrity. Most consumer DIMMs are either single rank or dual rank. In practice, four ranks per channel (two dual-rank DIMMs) is the practical upper limit for unbuffered DIMMs. When more thank two ranks are installed, additional tweaking may be necessary above and beyond enabling XMP. This is rarely difficult, and usually involves little more than a slight boost to the supply voltage for the IMC and DRAM. Data rate is usually sustainable.