New build help

[henryzz]

Originally Posted by axn

Yep, that's it. i3-8xxx supports DDR4-2400, so you wouldn't have to overclock anything (though you might have to fiddle with some settings in the BIOS).

Older intel cpus only supported 2133 Mhz DDR4 which is why the fiddle is needed on this memory.

[petrw1]

Originally Posted by petrw1

If my memory serves me then about a year ago you had a post the determines the RAM speed you need to keep up to a CPU (or in this case 8).

If so, what is your opinion of 16 or 32GB of DDR4 3600 for this CPU?
Will it keep up to 8 cores all doing LL tests?

I don't shop enough to know good deals or specs.
I can get this for $225 CAN on NewEgg.ca. Any comments on the manufacturer? Is 3400 on odd size for a 7820X? I would get 2 of these for 32GB. Thx.

CORSAIR Vengeance LPX 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3000 (PC4 24000) Desktop Memory Model CMK16GX4M2B3000C15W

[mackerel]

Originally Posted by petrw1

I don't shop enough to know good deals or specs.
I can get this for $225 CAN on NewEgg.ca. Any comments on the manufacturer? Is 3400 on odd size for a 7820X? I would get 2 of these for 32GB. Thx.

CORSAIR Vengeance LPX 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3000 (PC4 24000) Desktop Memory Model CMK16GX4M2B3000C15W

For the 7820X (and similar) CPUs you should be looking at a quad channel kit (4 modules) in order to make use of the quad channel memory controller it has. Edit: helps if I read, didn't see at first you were going to get two. Ignore me :)

[Mark Rose]

Originally Posted by Xyzzy

Maybe because we are using really slow (cheap) memory? (If we put in faster-rated memory, do we have to overclock the system?)

I would grab a pair of DDR4-3200 sticks, and run them at their rated speed. You don't need to overclock the processor.

[Mark Rose]

Originally Posted by petrw1

I don't shop enough to know good deals or specs.
I can get this for $225 CAN on NewEgg.ca. Any comments on the manufacturer? Is 3400 on odd size for a 7820X? I would get 2 of these for 32GB. Thx.

CORSAIR Vengeance LPX 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3000 (PC4 24000) Desktop Memory Model CMK16GX4M2B3000C15W

Looks like a good deal to me.

[petrw1]

Originally Posted by Mark Rose

Looks like a good deal to me.

Don't know where my eyes saw 3400Mhz. It's only 3000. A little slow?

[Mark Rose]

Originally Posted by petrw1

Don't know where my eyes saw 3400Mhz. It's only 3000. A little slow?

3400 would certainly be better 3000. But at what cost?

[petrw1]

I have: Intel Core i7-7820X Skylake-X 8-Core 3.6 GHz LGA 2066 140W BX80673I77820X Desktop Processor

I will very soon have: RTX 2080-Ti GPU

Then I will take them to a local "build shop" to put together my MOAB (Mother-Of-All-Builds).

I am requesting suggestions to be sure I get a CPU / MB / RAM combination that
minimizes bottlenecks while maximizing thruput ... without breaking the bank.

I want a build that will be effective whether running LL on all 8 cores (maybe 4 workers X 2 cores each; this needs fast RAM)
... or running P-1 on all 8 cores (this needs lots of fastRAM).

I understand I need:
- A MB that supports Quad Channel RAM.
- 4 equivalent / identical RAM sticks; 1 per channel.
I am thinking of 4 x 8Gb ... or will I regret not getting 4 x 16 Gb?

I want to buy fast RAM (3000+ I think) but how can I be sure that:
- The RAM isn't faster/slower than the MB can handle?
- The RAM isn't faster/slower than the CPU needs?
- The MB isn't a bottleneck for either the RAM or CPU?
- Anything else I need to consider here?

In case it is relevant I am leaning towards a small Flash Drive for the OS only and a large Hard Drive for personal files. I'll have an offsite backup and will look into Cloud backups as well.

I also want it to have a UPS.

I'm trying to balance a "mean machine" for me for GIMPS while providing a fast and reliable experience for my wife.

Thanks a lot.

[mackerel]

On my X299 system I used the Asus TUF mk2 as it was one of the cheaper boards. I've since filled it with 8x8GB of Corsair Vengeance RGB 3000 ram no problem. Ram compatibility is always a grey area once you get to higher speeds. See what's officially supported, or what others are really using on it. Boards shouldn't impact the ram speeds unless you're going for silly high speeds. For 8 cores you'll probably want to aim as high as you can realistically get for ram speeds.

[ET_]

Originally Posted by petrw1

I have: Intel Core i7-7820X Skylake-X 8-Core 3.6 GHz LGA 2066 140W BX80673I77820X Desktop Processor

I will very soon have: RTX 2080-Ti GPU

Then I will take them to a local "build shop" to put together my MOAB (Mother-Of-All-Builds).

I am requesting suggestions to be sure I get a CPU / MB / RAM combination that
minimizes bottlenecks while maximizing thruput ... without breaking the bank.

I want a build that will be effective whether running LL on all 8 cores (maybe 4 workers X 2 cores each; this needs fast RAM)
... or running P-1 on all 8 cores (this needs lots of fastRAM).

I understand I need:
- A MB that supports Quad Channel RAM.
- 4 equivalent / identical RAM sticks; 1 per channel.
I am thinking of 4 x 8Gb ... or will I regret not getting 4 x 16 Gb?

I want to buy fast RAM (3000+ I think) but how can I be sure that:
- The RAM isn't faster/slower than the MB can handle?
- The RAM isn't faster/slower than the CPU needs?
- The MB isn't a bottleneck for either the RAM or CPU?
- Anything else I need to consider here?

In case it is relevant I am leaning towards a small Flash Drive for the OS only and a large Hard Drive for personal files. I'll have an offsite backup and will look into Cloud backups as well.

I also want it to have a UPS.

I'm trying to balance a "mean machine" for me for GIMPS while providing a fast and reliable experience for my wife.

Thanks a lot.

After three years of waiting, I hope this Christmas I will get a similar machine, so I'm following this thread as well, interested on RAM type and speedto run GIMPS on a octocore (I read that an AsRock X299 could suffice as a MB).

[xx005fs]

Originally Posted by petrw1

I have: Intel Core i7-7820X Skylake-X 8-Core 3.6 GHz LGA 2066 140W BX80673I77820X Desktop Processor

I will very soon have: RTX 2080-Ti GPU

Then I will take them to a local "build shop" to put together my MOAB (Mother-Of-All-Builds).

I am requesting suggestions to be sure I get a CPU / MB / RAM combination that
minimizes bottlenecks while maximizing thruput ... without breaking the bank.

I want a build that will be effective whether running LL on all 8 cores (maybe 4 workers X 2 cores each; this needs fast RAM)
... or running P-1 on all 8 cores (this needs lots of fastRAM).

I understand I need:
- A MB that supports Quad Channel RAM.
- 4 equivalent / identical RAM sticks; 1 per channel.
I am thinking of 4 x 8Gb ... or will I regret not getting 4 x 16 Gb?

I want to buy fast RAM (3000+ I think) but how can I be sure that:
- The RAM isn't faster/slower than the MB can handle?
- The RAM isn't faster/slower than the CPU needs?
- The MB isn't a bottleneck for either the RAM or CPU?
- Anything else I need to consider here?

In case it is relevant I am leaning towards a small Flash Drive for the OS only and a large Hard Drive for personal files. I'll have an offsite backup and will look into Cloud backups as well.

I also want it to have a UPS.

I'm trying to balance a "mean machine" for me for GIMPS while providing a fast and reliable experience for my wife.

Thanks a lot.

Awesome build. However, is the rtx 2080 ti really that fast at LL? It seems like those numbers are inaccurate and a titan will 1/2 or 1/4 DP will be much faster than it? Also, where did the rtx 2070 data come from on mersenne.ca, is it a placeholder or engineering sample?