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2021-05-08, 19:26   #78
Xyzzy

Aug 2002

32×929 Posts

Quote:
 Originally Posted by chalsall I looking to do a new build myself sometime soon. I would be interested in knowing the list of all the parts and costing involved with this build. I know you've done it post-by-post, but would it be asking too much for you to put it all together in one spreadsheet and/or post?
https://pcpartpicker.com/b/GPBZxr#cx3947847

We mentioned in the initial post to this thread that an AMD CPU probably makes more sense.

2021-05-08, 19:36   #79
Xyzzy

Aug 2002

836110 Posts

Quote:
 Originally Posted by Uncwilly Right now I think he is around 20 months worth of my car payments on it.
While it may seem like a lot of money, we do have a few ways to help justify the cost.
• We sold a pile of old parts and other things which easily funded more than half the cost of this system. So, in a convoluted way, that was "free" money.
• We plan to keep this computer for five years, so the cost per hour is not-so-scary.
• We are debt-free (highly recommended!) so we have a bit of financial flexibility.
• We don't use drugs, alcohol or tobacco and we don't have cable TV. Those kinds of habits can really add up!

2021-05-08, 20:11   #80
chalsall
If I May

"Chris Halsall"
Sep 2002

13×773 Posts

Quote:
 Originally Posted by Xyzzy We mentioned in the initial post to this thread that an AMD CPU probably makes more sense.
Gulp! Wow!!!

I don't think my budget is going to be anywhere near that!

I just need to drive six (6#) or so monitors and run lots of VMs. So I'l be aiming for at least 128 GB of RAM.

A friend of mine's son was recently given a very nice AMD system. Twelve core or something. WinCrows seemed pretty snappy (as did, of course, Mindcraft... Sigh...).

2021-05-09, 01:22   #81
Xyzzy

Aug 2002

20A916 Posts

Quote:
 Originally Posted by PhilF For the current wave front FFT size, which is faster: AVX-512 @ 2.8Ghz, or the much hotter No-AVX @ 3.8Ghz?
Code:
CpuSupportsAVX=0 / CpuSupportsAVX2=0 / CpuSupportsAVX512F=0 / 18×3.8GHz

Iteration: 10000 / 106321573 [0.00%], ms/iter:  3.123, ETA: 3d 20:13
Iteration: 20000 / 106321573 [0.01%], ms/iter:  3.002, ETA: 3d 16:38
Iteration: 30000 / 106321573 [0.02%], ms/iter:  2.999, ETA: 3d 16:33
Iteration: 40000 / 106321573 [0.03%], ms/iter:  3.013, ETA: 3d 16:57
Iteration: 50000 / 106321573 [0.04%], ms/iter:  2.999, ETA: 3d 16:31
Code:
CpuSupportsAVX=1 / CpuSupportsAVX2=1 / CpuSupportsAVX512F=1 / 18×2.8GHz

Iteration: 10000 / 106321573 [0.00%], ms/iter:  1.917, ETA: 56:36:33
Iteration: 20000 / 106321573 [0.01%], ms/iter:  1.857, ETA: 54:50:40
Iteration: 30000 / 106321573 [0.02%], ms/iter:  1.856, ETA: 54:48:28
Iteration: 40000 / 106321573 [0.03%], ms/iter:  1.856, ETA: 54:47:11
Iteration: 50000 / 106321573 [0.04%], ms/iter:  1.856, ETA: 54:47:34

 2021-05-27, 22:37 #82 Xyzzy     Aug 2002 32·929 Posts 1× https://rog.asus.com/us/power-supply-units/rog-thor/rog-thor-850p-model/ $249.99 including shipping and taxes. Attached Thumbnails  2021-05-27, 22:42 #83 Xyzzy Aug 2002 32·929 Posts The wires and cords on the backside of the case are really messy, but we don't plan to look at them very often! Attached Thumbnails 2021-05-27, 22:52 #84 chalsall If I May "Chris Halsall" Sep 2002 Barbados 13×773 Posts Quote:  Originally Posted by Xyzzy The wires and cords on the backside of the case are really messy, but we don't plan to look at them very often! Just wondering... Have you ever watched the Terry Gilliam film "Brazil"? If not, please follow this link... I have sometimes found my own life a bit like this. Seriously.  2021-06-16, 12:23 #85 Xyzzy Aug 2002 32×929 Posts The fan on the Asus Thor PSU is, for some reason, on the wrong side. We knew that going in but we assumed that it would be okay with our build. However, it ended up running very hot. We used a non-contact infrared thermometer to measure the temperature of the grille on the back of the PSU. It was running at 60°C so it probably was much warmer inside. It is possible to flip the PSU over but then you cannot see the RGB stuff and the power meter, which is the whole reason for using a Thor PSU. So we put the 1000W Seasonic back in and everything is back to normal.  2021-09-18, 14:14 #86 Xyzzy Aug 2002 32×929 Posts 1× https://rog.asus.com/us/monitors/23-...pg259qn-model/ https://www.rtings.com/monitor/revie...-360hz-pg259qn https://tftcentral.co.uk/reviews/asu..._360hz_pg259qn$629.00 including shipping and taxes. We really like high resolution displays but we decided to experiment with a lower resolution display that has a high (360Hz) refresh rate. Obviously it works great with games but we are surprised at how comfortable it is for general use.
 2021-11-05, 14:17 #87 Xyzzy     Aug 2002 202518 Posts We learned something interesting about the ECC memory in our RTX 8000. Usually ECC memory is physically different. You have memory chips for data and an additional memory chip for parity/checksum data. If you turn off the ECC function you still have the same base memory amount. On the RTX 8000, with ECC enabled, there is (exactly) 45GB of memory. With ECC disabled there is (exactly) 48GB of memory. We suspect that the card is implementing "virtual" ECC memory by remapping what is ordinarily data memory to function as parity/checksum memory. An interesting possibility about a software solution like this is that is could be added to any video card with a firmware update. But we could be wrong. This is just our guess as to what is happening.
2021-11-05, 21:54   #88
retina
Undefined

"The unspeakable one"
Jun 2006
My evil lair

11000100111102 Posts

Quote:
 Originally Posted by Xyzzy On the RTX 8000, with ECC enabled, there is (exactly) 45GB of memory.
That suggests a 1:15 parity/memory ratio. Which is what ... 16 parity bits to 240 memory bits?

That would be a bit weaker than the normal 8:64 ECC. But it is doable.

How would that be laid out in the address space? I presume it would need to preserve the power-of-2 addressing for memory bits to keep performance at expected levels, so where are the ECC bits stored?

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