Final Words & Conclusion
At a going price of 449 Euro, the Taichi is surprising, as really ASRoc's trademark always has been affordable, or elt me rephrase towards, a more affordable product series. But as always, ASRock has a solid offering with a very complete and well-built product that looks gorgeous. But at sub 500 bucks, dude where's my 10 Gbit jack? It has been an unfortunate effect we see with all brands, the premium product prices have sky-rocketed towards a level that used to be called HEDT, and remember that as Comet lake is a mainstream desktop processor platform. That said, it is an impressive product otherwise. We cannot complain about the VRM design at 12+2+1 (50A) stages either really, albeit for this monme 90A stages would have been nicer.
Whenever we write a motherboard review, for the conclusion we need to make a distinction between the CPU and motherboard in the conclusion of course. Everybody will have an opinion about Comet Lake, but for motherboards, you need to be more factual about platform performance and features. Coming from Z390, Z490 really isn't that different in terms of the infrastructure in combo with Comet lake generation processors. The big miss for this hybrid symbiosis of CPU and motherboard is the lack of PCI Express 4.0 support running through the veins of the hardware eco system., and that's a bit of a miss on the intel side. The inserting thing is that Z490 range of motherboards factually is PCIe Gen 4.0 compatible, just not with this processor, here you will need the next-gen Rocket Lake-S series processors. So the 11th generation Core processors will double up on PCI bandwidth, opening up a plethora of options in terms of M2 storage and graphics cards. The reality is also this, do you really need PCIe Gen 4.0 in 2020? We honestly doubt it. A good PCIe Gen 3 M2 SSD is super fast, and for graphics cards, the Gen 3 or Gen 4 link just doesn't matter. In the past with Crossfire and SLI PCIe Generations made a difference, but even today if you go SLI, all data is now passed over the graphics cars though a high-bandwidth interface, internally bridged on the graphics cards. So yes, it matters less. So what's the big difference between Z390 and Z490 then? Well, nothing much on the chipset side really. Yes, the motherboards get a bump to AX WIFI (not this particular model though) and more refined Ethernet jacks starting at 2.5 Gbps. Also, overall the VRM design has been beefed up a notch, but that's a necessity for Comet Lake-S high-end processors really and their high PL2 states. However, making a move from Coffee lake (Gen9) towards Comet lake (Gen10) is not going to move mountains in terms of features and performance.
With these ten cores and twenty threads proc you get a 125 Watt TDP processor. With the system at idle with a GeForce RTX 2080 Ti installed / 16 GB memory / SSD and the Z490 motherboard, I hovered at roughly 60~65 Watts in IDLE. That's okay, the load values are okay as well but definitely higher. When we stressed the processor 100% run we reach roughly 200~250 Watts with the flagship 10-core part. That's the entire system. That is on the high side alright. Then again, does anyone actually care about it when you get performance metrics like shown today?
For Comet Lake-S (as well as 8th, 9th, and now 10th Gen Intel procs) and DDR4 we always say, volume matters more than frequency. A 3200 CL16 to 3600 CL18 MHz kit is plenty fast overall for all your needs. Higher frequency memory is more expensive and does offer better bandwidth but the performance increase in real-world usage will be hard to find. Unless you transcode videos over the processor a lot. As always, my advice would be to go with lower clocked DDR4 memory with decent timings, but get more of it. Don't go for 8 GB, get two or four DIMMs, and in total a minimum of 16 GB. we think the current sweet spot is 3200 MHz (CL14/CL16) or 3600 MHz CL16/CL18).
A problem with Heatpipe coolers
During our testing of the 10900K processor, we applied a heat[pipe cooler and noticed that the left side VRM heatsink with the two fans is very high, actually due to the fans. That height will make it bump into a lot of heat pipe coolers. Now I recommend LCS anyway, but should you opt heatpipe cooling, you need to select your cooler very carefully. our Dark Rock 4 cooler did not fit, so we had to change the orientation 90 degrees, which looks rather silly, and on that end, it can be an issue with DRAM height.
Performance & tweaking
Overclocking will be more limited towards the ASIC quality of your processor rather than the motherboard. Once tweaked we noticed that the 10 cores like a bit of extra voltage, we expect all-core tweaks in the 5.1~5.2 GHz marker to need 1.35~1.45 Volts on the processor. While that does increase power consumption, it wasn't something that scared me away.
Behold a 5200 MHz all-10-cores overclock.
Some platforms will and procs will also be able to manage a lower voltage. If you plan a tweak at that 5.2 GHz marker then remember my remarks on cooling, you will need LCS, that or a very good heatpipe cooler. Again, we have been using an ES sample so I cannot say anything conclusive on the final retail products (these might run a tiny bit cooler). The infrastructure that Z490 offers is easy to use, you increase the CPU voltage and multiplier and you are good to go. Another plus for the Intel platform is that over the years they have been able to refine their memory controllers, pop in anything XMP 2.0 and you have a 90% chance it'll work straight out of the box with very fast memories.
The ASRock Z490 Taichi is a premium model motherboard with nice support for USB 3.2 G2, that 12+2+1 power delivery and a reasonably solid range of networking options including Wi-Fi 6 and a 2.5 G Ethernet controller. At these prices, really 10 Gbps should be the norm though, to make the platform a bit more future proof. Being Taichi the motherboard is all 'geared up' again, and it looks well designed and stylish. I mentioned it many times already, the pricing of Z490 motherboards in the premium segment is skyrocketing. You should never forget that this processor series is 'mainstream', not HEDT. The premium boards start at 400 USD, and we even have seen some board reaching 1000 USD. And in this segment of the market that updates quite fast, that isn't going to help your purchasing decision. Man, in the past I deemed 300 USD motherboards to be premium and high priced, apparently, that's the new mainstream for motherboards, enough about the pricing though I think you get my point. The fans on the VRM area, under massive and long stress you can hear them softly. We, however, test on an open platform, with the motherboard built into a chassis, you'll be hard-pressed to hear them. Platform wise you'll get added features like AX Wifi and a luxurious Ethernet configuration on the form of 2.5 but not 10 Gbit ethernet jacks. The VRM design has been beefed up a notch to match the Comet Lake-S power states, and overall it's just a proper board with that look. Connectivity-wise in terms of your PCIe slots for your graphics subsystem you are looking at a full x16 Gen 3 lanes for one graphics card. While the platform is PCIe Gen 4.0 ready the reality remains that Z490 will only survive two generation s of processors, so Rocket Lake-S is the next series that will finally bring PCIe Gen 4.0.
Going from Z390 to Z490 is not going to bring you massive differences platform wise other than a new series processor. We really do doubt that the upgrade from Coffee lake to Comet lake is worth this kind of money really, coming from older generations that might be different. But platform wise you'll get some added features like AX Wifi and a more luxurious Ethernet configuration on the form of that 2.5 ethernet jack. In the end, this is a fun and nice motherboard that will please many. The high price might, however, make this a less attractive purchase. It's a similar trend we see with other manufacturers though. But hardware and aesthetics wise, good stuff, but it comes at a high real-estate price level.
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