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Search: Posts Made By: Mark Rose
Forum: Hardware 2022-01-20, 23:11
Replies: 133
Views: 19,426
Posted By Mark Rose
Kind of high wattage for the performance though....

Kind of high wattage for the performance though. Cheap to buy, expensive to run.
Forum: Software 2022-01-20, 23:02
Replies: 350
Views: 16,782
Posted By Mark Rose
Switching between hyperthreads of a core should...

Switching between hyperthreads of a core should have basically zero performance impact. All of the CPU caches are shared. So a bug, perhaps, but an inconsequential one.
Forum: Hardware 2022-01-13, 18:16
Replies: 27
Views: 6,820
Posted By Mark Rose
Yeah, Windows doesn't handle more than 64 threads...

Yeah, Windows doesn't handle more than 64 threads well, so I'd suggest disabling hyperthreading. They've apparently improved it somewhat, but it's still not as good as Linux.
...
Forum: GPU to 72 2022-01-13, 04:10
Replies: 5,235
Views: 392,949
Posted By Mark Rose
Looks like I did ten unneeded assignments as...

Looks like I did ten unneeded assignments as well. A day of processing. Not the worst; oh well.
Forum: Lounge 2022-01-12, 21:46
Replies: 892
Views: 106,446
Posted By Mark Rose
.

.
Forum: Forum Feedback 2022-01-12, 21:44
Replies: 19
Views: 423
Posted By Mark Rose
Can't upload webp images

Simple as that. webp is a format that's been around a decade and is widely used for images on websites.
Forum: Hardware 2022-01-12, 10:09
Replies: 25
Views: 818
Posted By Mark Rose
I'm tempted to buy a 5800X3D. I suspect it will...

I'm tempted to buy a 5800X3D. I suspect it will be a monster. It may be the chip to get if the price is reasonable.

As far as I know, with multiple CCX, L3 victims aren't written between CCX, so...
Forum: Data 2022-01-12, 02:55
Replies: 58
Views: 1,223
Posted By Mark Rose
I haven't played with it yet. I may get on the...

I haven't played with it yet. I may get on the p-1 fun, now that LLDC will complete.
Forum: GPU to 72 2022-01-12, 02:54
Replies: 5,235
Views: 392,949
Posted By Mark Rose
GPU72 doesn't give assignment ids. It holds on to...

GPU72 doesn't give assignment ids. It holds on to the assignment ids and the normal process is for a manual result to "poach" GPU72.
Forum: Information & Answers 2022-01-11, 23:45
Replies: 2
Views: 145
Posted By Mark Rose
You can probably start with an FFT of 5632 if...

You can probably start with an FFT of 5632 if you're interested in working exponents at the wavefront.

I wouldn't benchmark hyperthreading. Hyperthreads may give one or two percent increase, but...
Forum: Data 2022-01-11, 23:32
Replies: 58
Views: 1,223
Posted By Mark Rose
Which is how much? I'd say 32 GB is pretty...

Which is how much? I'd say 32 GB is pretty standard in a system these days. You mean like 256 GB? Or?
Forum: Hardware 2022-01-11, 23:14
Replies: 25
Views: 818
Posted By Mark Rose
The problem is memory bandwidth. One channel of...

The problem is memory bandwidth. One channel of DDR4 is good for two cores. Systems with four or eight channels of memory are far more expensive.

When I bought my 4 node i5-6600 cluster in June...
Forum: Hardware 2022-01-10, 23:12
Replies: 33
Views: 732
Posted By Mark Rose
Could also be condensation. Do you see any when...

Could also be condensation. Do you see any when you look at the system, around the time of day of the restarts?
Forum: Hardware 2022-01-10, 23:05
Replies: 9
Views: 356
Posted By Mark Rose
For ZFS, you absolutely want to avoid SMR. It...

For ZFS, you absolutely want to avoid SMR. It will try resilvering to the drive, then fail once the drive fills up its CMR area and begins to rewrite to its SMR area.

WD Red Plus are CMR. Seagate...
Forum: Hardware 2022-01-10, 22:54
Replies: 25
Views: 818
Posted By Mark Rose
I keep eyeing those as well. But my experience...

I keep eyeing those as well. But my experience with little boxes like that is that they will overheat and throttle.

Right now I'd build around a i3-10100 or i3-10105, F or non-F, two sticks of...
Forum: Hardware 2022-01-07, 00:37
Replies: 33
Views: 732
Posted By Mark Rose
Rename one mprime to something else, then use the...

Rename one mprime to something else, then use the PauseWhileRunning= configuration option in a second. That will keep the second mprime paused.

Or run mprime in a loop: while true; do mprime -d ;...
Forum: Hardware 2022-01-07, 00:34
Replies: 14
Views: 347
Posted By Mark Rose
The side with the wires should face the heat...

The side with the wires should face the heat block in a push configuration. If you add a second fan to increase cooling performance, orient it in the same direction so it pulls air out of the block...
Forum: Hardware 2022-01-05, 03:55
Replies: 14
Views: 347
Posted By Mark Rose
Are you overclocking? Which i9 specifically? ...

Are you overclocking? Which i9 specifically?

Air cooling is generally more reliable and cheaper if under you're 200 watts. Because of that, I've never been able to justify the expense of water...
Forum: Information & Answers 2021-12-27, 22:53
Replies: 32
Views: 1,392
Posted By Mark Rose
Much of that should probably be added to...

Much of that should probably be added to mersenne.org.
Forum: Marin's Mersenne-aries 2021-12-27, 21:30
Replies: 698
Views: 119,944
Posted By Mark Rose
Took DoubleCheck=67826191,75,1 ...

Took

DoubleCheck=67826191,75,1

PRP=1,2,106281101,-1

PRP=1,2,332197331,-1
Forum: GPU Computing 2021-12-16, 20:01
Replies: 1
Views: 284
Posted By Mark Rose
Take a Test Drive in the AMD Accelerator Cloud

Seems AMD is giving access to new Epycs and GPUs. Some people here may want to apply for access.
...
Forum: Data 2021-06-27, 09:28
Replies: 6
Views: 6,367
Posted By Mark Rose
For reasonably small numbers, like...

For reasonably small numbers, like 23504957230957830295783029578302495782 (38), you can factor it in a fraction of a second

$ time factor 23504957230957830295783029578302495782...
Forum: Marin's Mersenne-aries 2021-06-27, 02:09
Replies: 698
Views: 119,944
Posted By Mark Rose
I have a few Cat 2 exponents from this thread...

I have a few Cat 2 exponents from this thread that I'm pausing work on for a week or two during the heatwave. The computer they're running on shares a circuit with my portable AC and blew the breaker...
Forum: Hardware 2021-06-06, 08:10
Replies: 23
Views: 2,581
Posted By Mark Rose
These are the approaches I would take. 6 cores at...

These are the approaches I would take. 6 cores at reduced clock (~3 GHz) are still going to saturate that 3200 memory very well.
Forum: Marin's Mersenne-aries 2021-06-06, 04:10
Replies: 698
Views: 119,944
Posted By Mark Rose
Took triple checks up to and including...

Took triple checks up to and including DoubleCheck=59288681,76,1
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