Who's buying Skylake-X? (You may now change your vote)

[Edrick]

A 72-hour sample across different projects such as LHC@home, Rosetta@home, Yoyo@home, etc with power consumption #s would give me a pretty good idea of PPD and relative performance/efficiency versus adding more R7 1700 nodes. I'm planning on expanding my DC farm in the fall when I'm not as thermally limited (due to GPU farm not in sig + hot summer). Having a better idea of how Skylake-X compares to Ryzen for DC/crunching work would be nice. For new BOINC CPU hardware the R7 1700 is hard to beat for both efficiency and perf/$.

I use BOINC (mostly on my server). I was going to try and give you some numbers, but the 72 hour run (times multiple projects) in the middle of the summer will not be fun

I can easily supply you power consumption numbers on a much shorter run

 

[Nebor]

Got my 7900x, X299 Deluxe, 32gb of Gskills Tridentz, 1tb 960 Pro NVME, 8tb HGST, Asus PG348Q Corsair h100i, Corsair 450D case, and Corsair 850w PS up and running w/ Windows 10 Creators Edition. I've always had problems with my EVGA GTX 1080 FTWs in SLI, but on this new build it was even worse. 55% GPU utilization in most games, terrible performance. I tried fresh driver installs, fiddling with settings, etc. Wound up just trashing them and grabbing an EVGA 1080ti SC2 at best buy. Works like a dream.

The Corsair LINK software doesn't seem to get regular reporting from the motherboard. Sometimes the info is there, and sometimes it's not. And it reads a fan (the motherboard doesn't have any fans) that's constantly around 525,000rpm. I'm hoping future updates to Corsair LINK will fix that. Temps sit around 32C at idle. The highest I've seen it is 40C, but I haven't done anything that's put more than 25% load on the processor. Playing Ghost Recon Wildlands or Witcher 3 doesn't get the CPU load beyond 25%, and those are the most intensive things I'll ever use the computer for.

All in all I'm really happy with the system. I will say that the Asus BIOS\post process seems to take ages compared to my old EVGA x99 FTW K. I went from 11 seconds from power button to desktop to like 20 seconds button to desktop.

 

[AdamK47]

Well, I didn't buy the 7900X. Decided to be different. I just ordered an X299 MSI Gaming Pro Carbon, 16GB TridentZ DDR4 4266, and... a 7740X. I want to play around with it to see if 5GHz is as attainable as reviewers say it is. I don't think the little 4 core is going to be overloading the VRM.

 

[ManyThreads]

But even within that there is still a big difference. Like what's the difference that would make a C6H a better purchase over a Taichi? Or what does either of those two do that you would have needed a an X370 board over a B350?

I am not saying you did wrong or that your performance on a 7820x isn't worth it. There is a great chance that it is. I just see a lot of people comparing 1800x+C6H pricing vs. the 7820x and cheapest x299 setups to show the little difference. Yet talk about overclocking (not saying you have) on the 7820x. It's just comes off a disengenous and bothers me a bit.

Here you don't name why the B350 wouldn't work and choose the most expensive board. But then talk about needing cores and speed and nothing else. Where in theory if that was the real concern a person could do a 1700, clock it up to 3.8 on a B350. Get 85-90 the performance for almost half the price.

If that 10% makes all the difference in the world. It sounds like it might. Then why not just state that instead of fudging the numbers to make it seem like a small upgrade price? I mean in the end it probably shouldn't matter if you want the fastest 8c CPU the 7820x is by far the best option.

I'm not fudging any numbers, nor did I intend to say anything misleading. The plan was always to OC a 1700, I would not buy an 1800X. For max OC on a 1700, I wanted a quality board with beefy VRM. I use a ton of SATA ports, USB 3.0/3.1, etc. On top of that I keep my PC's for 6ish years, so I like the fully featured boards - more than once in the past I have been glad to see that my mobo had a certain port or feature that I didn't even consider when buying it, but because I bought a deluxe board I was covered. Also, Ryzen will support the AM4 socket for the next two iterations. A better board is more likely to be widely supported and have fewer issues with whatever Ryzen 2 and Ryzen 3 end up being.

Locally I do no have access to AS Rock boards, so for me it's ASUS, MSI, or Gigabyte, and I like ASUS from previous experience.

The X299 board I will likely get is about $100 CAD more than the CH6 - some of that is probably the X299 chipset cost, quad channel memory architecture, and also higher power requirements. There are X299 boards for the same price as the CH6 which are probably fine boards, but they aren't as well featured.

What I care about is the fastest possible combination of single and multi core performance, without getting into delidding and extreme OC stuff. That is the 7820X, and the $500 CAD between the AMD build I was going to do and the Intel build I am going to do is something I am willing to pay for the difference. I recognize the amazing value that Ryzen is, and almost bought it, but it's not enough for me this time around. Further to that I would have to factor into the Ryzen price upgrades to Ryzen 2 and/or Ryzen 3 to match the performance of the 7820X, since I wanted 8 cores at around 4.5 GHZ+ and I don't know which future Ryzen version would get me there.

 

[RichUK]

Well, I didn't buy the 7900X. Decided to be different. I just ordered an X299 MSI Gaming Pro Carbon, 16GB TridentZ DDR4 4266, and... a 7740X. I want to play around with it to see if 5GHz is as attainable as reviewers say it is. I don't think the little 4 core is going to be overloading the VRM.

Are you intending to upgrade the processor at some point?

 

[Arachnotronic]

Well, I didn't buy the 7900X. Decided to be different. I just ordered an X299 MSI Gaming Pro Carbon, 16GB TridentZ DDR4 4266, and... a 7740X. I want to play around with it to see if 5GHz is as attainable as reviewers say it is. I don't think the little 4 core is going to be overloading the VRM.

I like that board a lot. Have fun!

 

[IndyColtsFan]

You guys are making my trigger finger itchy to push the "Buy now" button.....

 

[AdamK47]

Are you intending to upgrade the processor at some point?

Maybe, but most likely not. My home PC is now relegated to PC gaming, browsing, and watching movies. Just the fun stuff.

 

[Arachnotronic]

Maybe, but most likely not. My home PC is now relegated to PC gaming, browsing, and watching movies. Just the fun stuff.

7740X is the best processor on the market for all of those things. Congrats!

 

[GoNavy1776]

A 72-hour sample across different projects such as LHC@home, Rosetta@home, Yoyo@home, etc with power consumption #s would give me a pretty good idea of PPD and relative performance/efficiency versus adding more R7 1700 nodes. I'm planning on expanding my DC farm in the fall when I'm not as thermally limited (due to GPU farm not in sig + hot summer). Having a better idea of how Skylake-X compares to Ryzen for DC/crunching work would be nice. For new BOINC CPU hardware the R7 1700 is hard to beat for both efficiency and perf/$.

Please forgive me but what is boinc?

 

[Arachnotronic]

You guys are making my trigger finger itchy to push the "Buy now" button.....

Which CPU/mobo?

 

[AdamK47]

I like that board a lot. Have fun!

Maybe you know the answer to this. In the manual it states this: "M.2 slots, U.2 port and SATA ports share the same bandwidth." I read that to mean the M.2 slots go through the PCH, which is what I need. Is that correct?

 

[Arachnotronic]

Maybe you know the answer to this. In the manual it states this: "M.2 slots, U.2 port and SATA ports share the same bandwidth." I read that to mean the M.2 slots go through the PCH, which is what I need. Is that correct?

I believe so, yes.

 

[Edrick]

How many GFlops should a 7820X @ 3.8Ghz (no HT) be putting out executing AVX-512 code? I'm trying to determine exactly how many AVX-512 ports this thing actually has.

Right now I am getting 611 GFlops using Intel's latest (6/27/2017) linpack_xeon64 binary (AVX-512).

Using Intel's old AVX2 binary, I got 361 GFlops. So I am thinking this confirms only 1 AVX-512 port.

*Edit* Actually, if this CPU only has 1 AVX-512 port, I would be seeing similar GFlops with AVX2 and AVX-512. I am thinking that this is fully enabled.

 

[Arachnotronic]

How many GFlops should a 7820X @ 3.8Ghz (no HT) be putting out executing AVX-512 code? I'm trying to determine exactly how many AVX-512 ports this thing actually has.

Right now I am getting 611 GFlops using Intel's latest (6/27/2017) linpack_xeon64 binary (AVX-512).

Using Intel's old AVX2 binary, I got 361 GFlops. So I am thinking this confirms only 1 AVX-512 port.

7820X only has one AVX-512 port. 7900X has two.

 

[beginner99]

but I haven't done anything that's put more than 25% load on the processor. Playing Ghost Recon Wildlands or Witcher 3 doesn't get the CPU load beyond 25%, and those are the most intensive things I'll ever use the computer for.

Why the hell would you buy a 7900x for this especially since a 7700k or 7740x would actually offer much better performance for 1/3 of the price?

 

[DrMrLordX]

Please forgive me but what is boinc?

https://boinc.berkeley.edu/

 

[GoNavy1776]

So you donate your CPU For science basically?

 

[DrMrLordX]

Yup, that's about it.

 

[rgba]

How many GFlops should a 7820X @ 3.8Ghz (no HT) be putting out executing AVX-512 code? I'm trying to determine exactly how many AVX-512 ports this thing actually has.

Right now I am getting 611 GFlops using Intel's latest (6/27/2017) linpack_xeon64 binary (AVX-512).

Using Intel's old AVX2 binary, I got 361 GFlops. So I am thinking this confirms only 1 AVX-512 port.

Looks like both 7800X and 7820X have full AVX-512 throughput.
http://www.pcgameshardware.de/Skylake-X-Codename-266252/News/Core-i7-7800X-AVX512-Durchsatz-1232713/

 

[DrMrLordX]

That's interesting. Others have said that is simply not the case.

 

[GoNavy1776]

Yup, that's about it.

Ahh gotcha... well I use mine for gaming and other tasks, i.e. drone video post, etc. not sure I would be easy going with that thing hogging my CPU all the time in the background.

 

[lobz]

Unfortunately for the moment this rig will use a dual channel configuration. My concerns are with cooling and PSU... It will be cooled with a Prolimatech Megahalems (I think its compatible), using a 550W PSU (Silverstone Platinum). I'm not sure if both will be enough to do the job.

Neither of them is sufficient - my 2 cents


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[lobz]

Cancel your memory and motherboard order and buy elsewhere?

Simples, no?

Surely he would have never thought of that, since most people buying brand new $1,000 CPUs are painfully simple minded

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[lobz]

I would return tour CPU. Wait on Tripper to drop and that chip might drop in price if Threadripper poses a threat.

TRIPPER
Sorry it was new for me...


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