ddr4 memory it's fast it's power
efficient it's a requirement if you want to pick up a fancy new CPU that needs it
and you can learn all about it here so with ddr4
available why would you want ddr3 anymore on top of all the other stuff
that i just said ddr4 has four in it that's like one more than
ddr3 the answer is cost at the time of
making this video ddr4 is more expensive
for a given capacity than ddr3 so for
that reason many potential customers will want to see it justify its higher
cost so welcome to our apples to apples
comparison of ddr3 and ddr4
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let's introduce our test platform shall we there are no cpus on the market that
support both ddr3 and ddr4 at least
consumer ones so we have to be pretty careful to reduce variables and make
this comparison as fair as possible it
starts with the processor so we chose two cpus based on the same haswell micro
architecture from Intel the core i7 4790k
and the core i7 5820k then we proceeded to disable two of the
cores on the 5820k and clocked them both
at straight 4.4 gigahertz with no turbo boost so neither of them would have any
raw clock speed advantage one thing we couldn't do anything about is the
difference in cache size but this is as close as we could get to a level playing
field for the CPU next up is motherboards we've got two Gigabyte
gaming 5 motherboards the z97x gaming 5
and the x99 gaming 5. we were looking
for feature equivalent boards to use for
both chips and both of these have a very similar loadout with SATA express
10 gigabit m.2 drive support amplified
onboard audio qualcomm killer networking
similar CPU power designs with gigabytes all digital implementation and of course
a sexy matte black and red color scheme that i find myself caring about probably
far too much the x99 version does have some extras to go along with its higher
price a more advanced sound processor three and four-way sli support and some
led lighting accents including on the heatsink and the i o shield to make it
easier to plug things in in the dark but enough about that you guys want to know
about the memory we're using right representing ddr3 at up to the highest
jdex speed 2133 megahertz with enhanced
timings we've got a 16 gig dual channel kit of xpg v1 memory resplendent in an
anodized red finish and representing
ddr4 at up to the highest jdec ddr4
speed 2400 megahertz although higher speeds will be coming a 16 gig quad
channel kit of adata's new ddr4 xpg z1
series with an updated aggressive looking heat spreader also featuring an
anodized red finish so huge thanks to adata for providing us with these
modules for testing even the brand new ddr4 modules operated flawlessly
throughout the benchmarking process and for that matter so did the motherboards
i'm really impressed especially with the x99 gaming 5. this one has made a lot of
progress gigabytes dropping BIOS updates like that and the stability of it is
much much improved over x99 at launch so
yeah everything just kind of went smoothly for a change anyway speaking of
the benchmarking process i guess uh that's what's next so i'm gonna show you
three different scenarios here first is ddr3 dual channel next is ddr4 dual
channel so we have a very direct apples to apples comparison between the two
memory technologies at a variety of speeds and timings and finally to show a
very best case scenario for modern ddr4
i threw in a set of results with the RAM overclocked to three gigahertz in quad
channel mode the configuration that most folks running ddr4 capable processors
will be running until broadwell comes to the mainstream desktop in dual channel
only sometime next year now synthetic benchmarks are where ddr4
should be able to really flex its muscles these ida 64 benches are
designed to show us the uppermost limits of the theoretical performance of the
memory subsystem of a pc in our apples to apples test ddr4 delivers better
performance in reads than ddr3 but actually worse right and latency results
making this a bit of a wash but in its full quad channel
configuration our high speed ddr4 is untouchable here next up is real world
non-gaming results multi-threaded rendering and our 7-zip compression and
decompression benchmarks are a good way to show off the performance of modern
cpus with lots of processing cores and high-speed memory is needed to keep all
of those cores fed so something to note here is that while the performance
scaling with better memory might not look very impressive the lga 2011 3
socket is likely to be with us for a few years and has cpus available for it
already with up to 18 cores so while the
extra bandwidth even in quad channel isn't needed for this artificial
quad core that we created here there are ways to kit out a board like this so
that it's much more likely that that extra memory bandwidth would be used
which leads to our final set of benchmarks games i only ended up running
a couple of games the canned benchmark in tomb raider at these settings and my
custom run at the end of bioshock infinite at these settings because the
results here don't leave much for me to interpret even going all the way down to
ddr3 13 33 megahertz so nearly the
launch speed of ddr3 in dual channel i couldn't create a situation where game
performance was limited in any meaningful way by the memory subsystem
on a haswell-based CPU with only four
cores so in conclusion while it might be
worthwhile from a platform point of view to invest in ddr4 for your six core or
eight core processor since you don't really have a choice if you want the
latest cpus if you're a normal consumer who doesn't really need the extra course
it looks like lga 1150 with its ancient
ddr3 memory still has a lot of life left in it and given how unconstrained our
haswell cpus are even by very low speed
ddr3 i think it's safe to say that the performance improvements we can expect
to see from Intel's upcoming broadwell desktop processors will be thanks to
architectural improvements not the use of ddr4
guys like this video if you liked it dislike it if you disliked it leave a
comment letting me know what you thought were you expecting ddr4 in an apples to
apples comparison to run away with it or were you expecting exactly the results
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