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Search: Posts Made By: mackerel
Forum: Hardware 2021-09-05, 13:22
Replies: 12
Views: 1,054
Posted By mackerel
Thanks for the reply, but what I was looking for...

Thanks for the reply, but what I was looking for are the physical reasons why that is the case. Design history and the core tradeoffs don't address that.

To answer your question on 4 GHz CPUs that...
Forum: Hardware 2021-09-05, 08:21
Replies: 42
Views: 3,217
Posted By mackerel
A possible explanation I've seen is that both...

A possible explanation I've seen is that both cores need to share a common feature set. As threads get moved around you can't end up with a situation where code needs AVX-512, but it can't be...
Forum: Hardware 2021-09-05, 08:09
Replies: 12
Views: 1,054
Posted By mackerel
Do you have a reference to this which goes into...

Do you have a reference to this which goes into more depth?

I recognise you say it is simplistic, but as an illustration, using that "as is" then a 5.0 GHz CPU would be 95% more power usage...
Forum: Hardware 2021-08-07, 08:48
Replies: 12
Views: 1,054
Posted By mackerel
I don't have a complete picture here, but based...

I don't have a complete picture here, but based on what we know about Ice Lake mobile and Ice Lake Xeons, my money would be on the process technology as the primary differentiator.

Cascade Lake...
Forum: Hardware 2021-08-02, 08:42
Replies: 46
Views: 5,836
Posted By mackerel
I haven't looked at it in a while but I recall...

I haven't looked at it in a while but I recall from testing on Zen 2 scaling beyond a CCX was less than ideal. I don't see any reason for that to change with Zen 3 other than a CCX is now bigger....
Forum: Hardware 2021-07-29, 19:00
Replies: 46
Views: 5,836
Posted By mackerel
I don't think Intel want to get rid of AVX-512 as...

I don't think Intel want to get rid of AVX-512 as they're still busy stuffing it where they can. How the support of it will be handled in Alder Lake remains to be seen and I think is a software (OS)...
Forum: Hardware 2021-07-21, 08:24
Replies: 5
Views: 644
Posted By mackerel
That is looking a lot better, and puts the peak...

That is looking a lot better, and puts the peak bandwidth closer to that of entry level discrete GPUs. e.g. RX 560 and GTX 1050 are both rated at 112 GB/s.

On the DDR5 ECC thing it has been a...
Forum: Hardware 2021-07-18, 22:40
Replies: 5
Views: 644
Posted By mackerel
Was just estimating its gaming performance...

Was just estimating its gaming performance elsewhere. Let's just say I think people will have to be careful to balance expectations according to the hardware and not fall for hype.

On compute, how...
Forum: Lounge 2021-07-07, 10:49
Replies: 25
Views: 1,404
Posted By mackerel
Wont be the biggest numbers but my personal...

Wont be the biggest numbers but my personal maximum was Swindon to Edinburgh. I don't recall the exact numbers. According to Google Maps it is 370 miles estimating 6h40m. From memory the trip...
Forum: Hardware 2021-07-06, 08:30
Replies: 28
Views: 2,418
Posted By mackerel
We overlap in a mobo with the Z390M-ITX. I'm...

We overlap in a mobo with the Z390M-ITX. I'm pretty sure I didn't see the option in there, but if I overlooked it I would welcome a pointer to where it is. I found an option that only allowed TPM to...
Forum: Hardware 2021-07-03, 20:13
Replies: 28
Views: 2,418
Posted By mackerel
fTPM might be included in "recent" platforms...

fTPM might be included in "recent" platforms however it is up to the mobo manufacturer if they want to expose it. So far for Intel mobos, Asus seems best with my X299 and B560 mobos having that...
Forum: Hardware 2021-06-09, 08:00
Replies: 79
Views: 9,370
Posted By mackerel
At the time I was looking at Chia, it was worth...

At the time I was looking at Chia, it was worth in the ball park of $1000, although today it is close to $550. I was estimating on the magnitude of one hit a year. For the cost of running some old...
Forum: Hardware 2021-06-04, 20:47
Replies: 79
Views: 9,370
Posted By mackerel
If that was long enough ago, MBR was the common...

If that was long enough ago, MBR was the common partition format which had capacity limits. This is no longer a limit as GPT has taken over for a long time. If you want a single 12 TB partition, you...
Forum: Hardware 2021-06-03, 09:15
Replies: 79
Views: 9,370
Posted By mackerel
Unfortunately the temporary file size during...

Unfortunately the temporary file size during plotting is stated as begin 239 GiB. A 256 GB ram system should have just enough for a ramdisk to do that, but this implies you need a HEDT system. I...
Forum: Hardware 2021-06-03, 08:18
Replies: 79
Views: 9,370
Posted By mackerel
Chia works in two parts. One is creating the...

Chia works in two parts.

One is creating the data files, which they call plotting. This is the part which can be sped up by using SSDs, but the quantity of writes to them could wear them out...
Forum: Hardware 2021-06-02, 10:05
Replies: 15
Views: 1,414
Posted By mackerel
Zen 4 being later than sooner is an often...

Zen 4 being later than sooner is an often discussed possibility, but it wasn't so much due to 5nm as DDR5 as the given reason. If Intel go DDR5 first, they'll take the early adopter hit on pricing...
Forum: Hardware 2021-06-01, 17:03
Replies: 15
Views: 1,414
Posted By mackerel
https://www.anandtech.com/show/16725/amd-demonstra...

https://www.anandtech.com/show/16725/amd-demonstrates-stacked-vcache-technology-2-tbsec-for-15-gaming

Sone new news which answers pretty much what I asked.
Forum: Hardware 2021-06-01, 16:45
Replies: 15
Views: 1,414
Posted By mackerel
Again looking at my Cezanne, that's benchmarking...

Again looking at my Cezanne, that's benchmarking with Aida64 (old version not optimised for recent CPUs) at around 1 TB/s on L2. I'm not sure if that is aggregate or per core. Even if aggregate, it...
Forum: Hardware 2021-06-01, 16:35
Replies: 15
Views: 1,414
Posted By mackerel
AMD showed a consumer CPU with that cache, not a...

AMD showed a consumer CPU with that cache, not a threadripper. It is on that basis I'm asking questions trying to figure out how it might work in practice. We can worry about it scaling elsewhere...
Forum: Hardware 2021-06-01, 16:02
Replies: 15
Views: 1,414
Posted By mackerel
There are many different possible workloads, and...

There are many different possible workloads, and not all of them stress bandwidth. For those that do, moving data has been a bigger problem than execution for a long time. Caches are one solution to...
Forum: Hardware 2021-06-01, 13:57
Replies: 15
Views: 1,414
Posted By mackerel
Very interesting development, but opening many...

Very interesting development, but opening many questions:
Bigger cache usually = slower cache. For gaming and P95, might not be a problem. For other use cases: ??? Comes down to size of data.
How...
Forum: Hardware 2021-04-29, 15:48
Replies: 77
Views: 11,522
Posted By mackerel
That's one of many gaps in my knowledge filled...

That's one of many gaps in my knowledge filled out. I had taken FFTs to be #1 in the above only (throw more FP64 at it), and thought #3 was something else entirely. I think #3 might be the one used...
Forum: Hardware 2021-04-29, 09:28
Replies: 77
Views: 11,522
Posted By mackerel
Is trying to use FPGAs to implement FFTs the best...

Is trying to use FPGAs to implement FFTs the best way forward? By that I mean, is there some other algorithm that might work more efficiently on FPGA by taking better advantage of what the hardware...
Forum: Hardware 2021-04-19, 21:02
Replies: 79
Views: 9,370
Posted By mackerel
During the last bubble a couple of years ago,...

During the last bubble a couple of years ago, Burst was the disk based "proof of capacity" crypto. Didn't seem to go anywhere since. The link in OP makes this new one sound more intensive in disk...
Forum: Hardware 2021-04-12, 18:59
Replies: 3
Views: 706
Posted By mackerel
I got lucky and picked up a 3070 as I happened to...

I got lucky and picked up a 3070 as I happened to be online when new stock was added to a site I visit. But essentially... things aren't looking great. My target was a launch 3080 or hold out for the...
Showing results 1 to 25 of 440

 
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