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Search: Posts Made By: mackerel
Forum: Hardware 2020-09-02, 16:19
Replies: 95
Views: 5,380
Posted By mackerel
How much does VRAM contribute to the final price?...

How much does VRAM contribute to the final price? There is quite a bit of it on there. Maybe not enough to explain all the price, but it will contribute.


The pricing for the nvidia cards are on...
Forum: Software 2020-08-20, 09:23
Replies: 602
Views: 79,329
Posted By mackerel
They way I look at Windows CPU usage reporting is...

They way I look at Windows CPU usage reporting is that it shows the thread usage time, which is not a linear relationship to core usage or throughput when HT is involved.

Consider a 4 core CPU...
Forum: Hardware 2020-08-14, 09:10
Replies: 1
Views: 502
Posted By mackerel
Yup, Tiger Lake is mobile only. Now that it has...

Yup, Tiger Lake is mobile only. Now that it has gone to non-inclusive cache, the combined L2+L3 of 4.25MB/core compares close with desktop Zen 2's 4.5MB/core (max core config). Hopefully this is kept...
Forum: Hardware 2020-08-10, 19:34
Replies: 1
Views: 600
Posted By mackerel
The section under things it is NOT good at:...

The section under things it is NOT good at: "Workloads bound by memory bandwidth". As far as I can tell it is essentially some kind of SSD and they only claim 2.2GB/s at 70% read/30% writes. At that...
Forum: Hardware 2020-08-07, 16:20
Replies: 31
Views: 1,378
Posted By mackerel
Regardless of the mechanism, I've had both HDs...

Regardless of the mechanism, I've had both HDs and SSDs die on me. As always, best practice is to have backups of any important data so you're ready when it happens, not if.

I'm not an average...
Forum: Hardware 2020-07-30, 08:04
Replies: 6
Views: 752
Posted By mackerel
Funnily enough, Boeing's CFO also serves on...

Funnily enough, Boeing's CFO also serves on Intel's board of directors. Intel also have EA's CEO on their board, so many have made jokes around that too.
Forum: Hardware 2020-07-25, 08:53
Replies: 13
Views: 1,044
Posted By mackerel
There are multiple factors that all feed into the...

There are multiple factors that all feed into the overall performance.

For scenarios where the cores are not limited by cache/ram, normalised for cores&clock, Zen 2 is about 5.7% faster than...
Forum: Hardware 2020-07-03, 20:13
Replies: 5
Views: 1,096
Posted By mackerel
I had to ask on another forum, given that GPUs...

I had to ask on another forum, given that GPUs have massive throughput already, why do we need to run these on CPU? The response I got was along the lines of some data sets are simply too large to be...
Forum: Hardware 2020-06-18, 23:19
Replies: 60
Views: 4,712
Posted By mackerel
Sounds like you're describing a full wave bridge...

Sounds like you're describing a full wave bridge rectifier arrangement. While I'm not familiar with worldwide power efficiency standards, I think they've pretty much been consigned for the history...
Forum: Software 2020-06-06, 20:06
Replies: 30
Views: 2,333
Posted By mackerel
I got offered the update on a Haswell-E system,...

I got offered the update on a Haswell-E system, but it hasn't shown up at all on 4 other Skylake or newer systems.

I heard elsewhere there is a known problem if you use Optane Memory Cache. Not...
Forum: Hardware 2020-05-26, 23:25
Replies: 60
Views: 4,712
Posted By mackerel
I'm not aware of a quad core Skylake-X CPU. The...

I'm not aware of a quad core Skylake-X CPU. The range started with the 6 core 7800X, which I used to have. At the time it was current, they were often found cheaper than the consumer 6 core 8700k...
Forum: Hardware 2020-05-23, 22:16
Replies: 60
Views: 4,712
Posted By mackerel
Is it the case that Prime95 can do some work with...

Is it the case that Prime95 can do some work with AVX-512 it can't without? My understanding was AVX-512 is more a throughput thing in this use case. It does more of the same, not doing something new...
Forum: Hardware 2020-05-22, 23:23
Replies: 60
Views: 4,712
Posted By mackerel
I believe the mobile Ice Lake implementations...

I believe the mobile Ice Lake implementations with AVX-512 are single unit, so may not offer any more throughput than AVX2 anyway. Two unit AVX-512 is on the HEDT platform and some Xeons.

The...
Forum: Hardware 2020-05-19, 16:32
Replies: 16
Views: 2,046
Posted By mackerel
With hindsight, I think their mistake was not to...

With hindsight, I think their mistake was not to clarify compatibility earlier. This scenario we are entering is exactly why they didn't want to support it at all. Will be interesting to see who does...
Forum: Hardware 2020-05-17, 08:21
Replies: 16
Views: 2,046
Posted By mackerel
If something is supported or not supported is one...

If something is supported or not supported is one of the annoying things about AMD messaging, but also in another way understandable. The chart that sparked all this off also shows X370 as not...
Forum: Hardware 2020-04-19, 08:24
Replies: 21
Views: 1,590
Posted By mackerel
I found this works well without overhead... at...

I found this works well without overhead... at least on lower core count systems (up to 8 or so?). Over on PrimeGrid some users of higher core count Zen 2 models (32+) reported lower than expected...
Forum: Hardware 2020-04-15, 17:42
Replies: 17
Views: 1,894
Posted By mackerel
My thinking wasn't so much running the PSU at...

My thinking wasn't so much running the PSU at close to 100% load 24/7, but that the PSU could cope in case you entered that situation at all. If you were to add two GPUs, I'd guess you'd prioritise...
Forum: Hardware 2020-04-15, 12:19
Replies: 17
Views: 1,894
Posted By mackerel
I got a couple of these from work which was...

I got a couple of these from work which was throwing them out.

The cooler isn't great but just about adequate. The CPU will be kept within Intel specs anyway. I'd try running some ram verification...
Forum: Hardware 2020-02-23, 09:43
Replies: 0
Views: 875
Posted By mackerel
Xeon Phi (Knights Landing) in 2020?

This post is triggered in part as used systems are starting to become "affordable". I've been looking, and based on another forum post on PrimeGrid I'm not alone in noticing this. The question then...
Forum: Hardware 2020-02-08, 17:57
Replies: 133
Views: 15,336
Posted By mackerel
If you turn off SMT then that simplifies things....

If you turn off SMT then that simplifies things. I don't know if the way Prime95 interacts with Windows will be limited by the groups or not. Worst case with SMT on it might effectively be limited to...
Forum: Hardware 2020-02-08, 16:17
Replies: 133
Views: 15,336
Posted By mackerel
I guess it is a new "problem" for consumers to...

I guess it is a new "problem" for consumers to have so many cores/threads available, but apparently behaviour can be problematical depending on version of Windows and software awareness of high...
Forum: Hardware 2020-02-02, 11:45
Replies: 178
#1
Views: 17,933
Posted By mackerel
The strength and weakness of HBM is that it is...

The strength and weakness of HBM is that it is very wide but relatively slow clocked. For a highly parallel workload like GPU, that's not a problem. For a CPU it might be too wide to be effective...
Forum: Hardware 2020-02-01, 23:41
Replies: 178
#1
Views: 17,933
Posted By mackerel
Not an expert in the area, but understand that...

Not an expert in the area, but understand that bigger cache = slower access. That's why there are usually 3 levels of cache on x86 CPUs. Small but ultra-fast next to the cores, medium size medium...
Forum: y-cruncher 2020-02-01, 11:49
Replies: 17
Views: 11,407
Posted By mackerel
Reading this I almost want to have a go....

Reading this I almost want to have a go. Almost... That storage requirement is scary...
Forum: Hardware 2020-01-09, 18:57
Replies: 20
Views: 2,630
Posted By mackerel
What FFT size are the tests? Assuming they're big...

What FFT size are the tests? Assuming they're big enough to be ram bandwidth limited, the rank is the factor. When I originally built a 6700k system I got some performance and thought nothing of it....
Showing results 1 to 25 of 385

 
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