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There are some key choices to make
when building a Ryzen system, in
terms of features, cooling and
hardware support. There’s a number of
chipsets from which to choose, some of
which don’t support overclocking. Some
chipsets also have more features, while
others allow motherboards to retail for much
cheaper prices. You’ll also need to factor
cooling into the equation, making sure
your CPU cooler is compatible with your
motherboard, as older coolers may not fit on
the new AM4 socket. Memory support isn’t
quite as wide-ranging as on Intel systems
either, and you’ll need to set up your system
correctly too.
CPUs
There are three factors to consider when
buying a Ryzen CPU. Firstly, there’s the choice
between an X-edition and standard CPU – for
example, between the Ryzen 7 1700X and
Ryzen 7 1700. The X-edition chips are
supposedly speed-binned and could yield
higher overclocks, while also offering faster
stock frequencies and higher XFR boost
speeds. Chips without the ‘X’ suffix are priced
much lower than their X-edition counterparts,
though, and often have lower TDPs too.
The next consideration is clock speed.
Chips without the ‘X’ suffix have lower
frequencies, meaning they’re perhaps not
ideal for running at stock speed, depending
on your requirements. That said, in our own
testing, the Ryzen 7 1700 is often able to
overclock just as far as the Ryzen 7 1700X and
1800X and costs considerably less money, so
it’s by far our favourite Ryzen 7 CPU if you’re
up for a bit of overclocking.
Finally, you need to consider cores and
threads. With cache levels remaining the
same from the Ryzen 7 1800X all the way
down to the Ryzen 5 1500X quad-core chips,
the main difference between the Ryzen 5 and
7 chips is the number of cores. If you’ll be
doing a reasonable amount of heavily multi-
threaded work, such as video encoding with
Handbrake, or 3D rendering, then you’ll want
to opt for a Ryzen 7 CPU. These chips can
trounce Intel’s 6-core equivalent CPUs for
lower prices, and give the far more expensive
Core i7-6900K a run for its money too.
CHIPSETS
Assuming you’ll be up for some overclocking,
there are just two chipsets from which to
choose when it comes to micro-ATX and ATX
motherboards. The X370 chipset offers the
ability to use both 16x PCI-E slots in an 8x/8x
multi-GPU setup, and it has more native
USB 3 ports and SATA 6Gbps ports than the
B350 chipset too.
However, motherboard manufacturers
have latched on to X370 as being the
premium chipset, so motherboards can cost
anywhere between £150 and over £300.
Boards with the B350 chipset, on the other
hand, can retail for under £100, yet they still
have enough ports to cater for most
enthusiasts, including people who want to
use a super-fast NVMe M.2 SSD. Small form
factor fans will be pleased to know that all
three overclocking-capable chipsets will
be finding their way onto mini-ITX
motherboards soon too, including the X300
chipset, which has been designed with small
motherboards in mind.
MEMORY
Every motherboard we’ve tested so far has
managed to get 3000MHz and faster kits
up to 2933MHz, but only modules with
Samsung B-die modules, such as GeIL’s
expensive Evo X kits and a selection of GeIL
memory, have managed higher frequencies.
That’s unfortunate, as Ryzen’s Infinity Fabric
high-bandwidth interconnect is synchronised
to the memory frequency, so lower memory
speed can limit performance.
Thankfully, AMD is taking steps to improve
the situation. In the latest Ryzen community
update on AMD’s website, the company has
been talking about updating the AMD Generic
Encapsulated Software Architecture
(AGESA). The changes will particularly relate
to BIOS updates, specifically microcode
included in the BIOS file. Many of the latest
releases include an updated microcode that
can decrease DRAM latency by 6ns and
remove the need to use the High-Precision
Event Timer (HPET) when using AMD’s Ryzen
Master overclocking utility.
This particular update is already rolling
out, but more importantly, at the end of the
community update, AMD states that it’s
working on a release that specifically
addresses overclocked DDR4 memory.
This update could signal better memory
compatibility and faster speeds on the
horizon, so it’s worth checking motherboard
manufacturers’ websites during May to see
if there are new BIOS files with a second
AGESA update that improves memory
compatibility.
COOLING
There are a few considerations when it
comes to cooling an AMD Ryzen system.
Firstly, you’ll want to ensure that a stock-
speed CPU has enough headroom for
AMD’s XFR boost technology to fully extend,
and if you’re overclocking your CPU, you’ll
want your cooling to be powerful enough to
keep it in check.
If your CPU will spend a lot of time under
heavy multi-threaded loads, you’ll also want
to consider bolstering your case’s cooling to
provide more airflow over the motherboard.
We’ve opted for this month’s 120mm all-in-
one liquid cooler Labs winner – ARCTIC’s
Liquid Freezer 120 (see p41), which managed
a delta T of 35°C in our AM4 test system, with
a 67°C temperature reported in AMD’s Ryzen
Master software. As we established in our
Ryzen coverage last month, the Ryzen 7 1700
we’re using also lacks the 20°C temperature
offset of the X-edition CPUs, which would be
reporting temperatures bordering on 90°C.
Dropping down to ARCTIC’s Freezer 33 air
cooler saw the delta T rise from 35°C to 42°C
and the air cooler was much noisier than the
liquid cooler too, but it does show that a £30
CPU cooler is still more than capable of
keeping an overclocked Ryzen CPU cool.
What’s more, if you’re running your CPU at
stock speed, the lower temperatures
theoretically shouldn’t interfere with AMD’s
Precision Boost or XFR technologies.
We put this to the test in Cinebench using
a Ryzen 7 1700 at stock speed to allow
Precision Boost and XFR to kick in where
possible, and whether we used the multi-
threaded or single-core tests, despite higher
temperatures on the Freezer 33, the scores
were either identical or extremely close to
the scores when using the Liquid Freezer 120.
TEMPERATURE
012 24 36 48
35°C
42°C
ARCTIC
Freezer 33
ARCTIC Liquid
Freezer 120
Delta T (overclocked)
Lower is better
Higher is better
CINEBENCH R15
0400 800 1,200 1,600
1,424
1,419
ARCTIC
Freezer 33
ARCTIC Liquid
Freezer 120
Multi-threaded test
Single-core test
040 80 120 160
140
140
ARCTIC
Freezer 33
ARCTIC Liquid
Freezer 120
IMPORTANT RYZEN DECISIONS