when i first saw the pentium g4560
at 64. earlier this year i thought
gee the core i7 6850 is almost exactly 10
times the price we should see if it's at all worth it
but we kind of missed the boat on that one
because the core i9 is here now so i mean
who would even care about this comparison anymore anyway
wait we'll just use its replacement the core i9 7820x
and we'll just agree to disagree about how many times 64 goes into 600
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let's get this out of the way right now we are not expecting the pentium g4560
to go toe-to-toe with the core i9 7820x
that's stupid i mean for one the core i9 has turbo
boost to say nothing of the six
extra cores that it's packing under the hood
well okay Linus then what is the point of this video
i'm glad you asked first since one is roughly
ten times the cost of the other we thought this would give us a good feel
for how pricing scales with performance
within Intel's product stack because
i think obviously we're not going to be getting 10 times the performance with the core
i9 right or will be
no we've been through that that's stupid
reason number two is that this will give us some interesting insight into
bottlenecks and where they show up within the system for example will the
rebalanced cache and avx-512 support of the core i9 help it
will it hinder it will it depend on the workload
how much will the extra cores help with real world tasks does it even really
matter now i know i know
raw performance isn't the whole story the core i9 has more than double the pci
express lanes quad channel memory support blah blah blah
and those features don't come cheap so it makes sense that you'd be paying a
premium for both the CPU and the accompanying motherboard and because the
core i9 demands a better cooling solution
surprise you get to buy one of those too they even require more thermal compound
thanks to their larger physical size i mean
the pentium comes with a cooler and compound that's more than adequate for
it right out of the box so then with all these differences how
can we possibly compare the two easy we'll just dump a bunch of
benchmarks into excel like we always do and wait really
is that all i'm paying these guys for oh no there's more here actually oh cool
okay so while we'll be running the two chips on otherwise identical hardware we
are also going to run a second set of
tests on the 7820x with it configured
with only two cores enabled and clocked like a g4560
so in the past this method of cutting down higher-end chips has generated
pretty accurate simulations of lower-end ones but today the new cache setup and
support for avx-512 might make things a little more interesting
our gaming results well okay these ones aren't going to shock anybody our
simulated 4560 does slightly better than
the real thing and the stock 7820x blows
the doors off of both in every test
but while that difference is measurable our
arch nemesis doctor point of diminishing returns
makes a bold appearance here interestingly our simulated chip
actually fell slightly but measurably
short of the real one at 4k in cs go and
in 3dmark which makes us wonder where else we might see Intel's new caching
mechanism perform worse bottom line here if you thought that
spending 10 times was gonna net you 10 times the performance in gaming
uh i believe as the gamers say get wrecked
productivity though was really interesting in applications like y
cruncher that support avx 512 we saw a
massive difference with the simulated g4560
while in more traditional tasks like cinebench CPU mark and real bench the
cash related performance boost is less exciting with real benches and coding
tests revealing another situation where it may actually cause a slight
performance regression it's not over for the simulated chip
though because our real world blender test also sees a huge performance boost
over the real 4560. in productivity applications the lack of
avx and course hurts our value chip big
time the 7820x still doesn't give you 10
times the performance for its price
but given that many of these workloads are
business oriented ones time is money and even a 2x performance
improvement or a more modest one could allow it to pay for itself over time so
your mileage may vary power consumption is probably not going
to surprise anybody so we'll skim through that but what might is the
performance scaling using some simple math helpfully
provided by alex we crunched the numbers and calculated a very theoretical
ballpark for how pricing would look if it scaled linearly with performance
so in that world from the perspective of the core i9 7820x
the performance averaged price of the pentium would actually be roughly five
times as expensive as it is today
then looking at it the other way around the price of the core i9 7820x
would work out to about a quarter of its current msrp of
600. so what did we learn today well first
and foremost that CPU pricing at least for team blue is more complicated than
just how does it benchmark on a test bench
and uh then uh you know what price tag should we slap on it and more
importantly perhaps we've also confirmed that skylake x's new cache
generally helps more than it hinders though it can hinder situationally
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