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241

Talos II / Re: RAM clock with full channels

« on: July 17, 2021, 07:05:11 pm »

Speed decreases with the number of DIMMs per channel. You get the full 2666MHz with a single DIMM per channel, 2400 for 2, 2133 for 4. However, the controller for each processor has 8 channels, and the T2 has 8 DIMM slots per CPU, so I don't think you're going to have a problem as long as you have both CPU sockets populated.

Here's what lshw reports on my 64GB dual-8 Talos II (the workstation I'm typing on):

Code: [Select]

     *-memory
          description: System memory
          physical id: 0
          size: 64GiB
        *-bank:0
             description: RDIMM DDR4 2666 MHz (0.4ns)
             product: 36ASF2G72PZ-2G6F1
             vendor: Micron Technology
             physical id: 0
             version: 0000,19 20,25
             serial: 0xf054945f
             slot: UOPWR.A100059-Node0-DIMM2
             size: 16GiB
             clock: 2666MHz (0.4ns)
             capabilities: ecc spd-1.1
             configuration: errordetection=ecc rank=2
        *-bank:1
             description: RDIMM DDR4 2666 MHz (0.4ns)
             product: 36ASF2G72PZ-2G6F1
             vendor: Micron Technology
             physical id: 1
             version: 0000,19 07,0F
             serial: 0x20ab81d0
             slot: UOPWR.A100059-Node0-DIMM6
             size: 16GiB
             clock: 2666MHz (0.4ns)
             capabilities: ecc spd-1.1
             configuration: errordetection=ecc rank=2
        *-bank:2
             description: RDIMM DDR4 2666 MHz (0.4ns)
             product: 36ASF2G72PZ-2G6F1
             vendor: Micron Technology
             physical id: 2
             version: 0000,19 20,25
             serial: 0xf054948a
             slot: UOPWR.A100059-Node0-DIMM10
             size: 16GiB
             clock: 2666MHz (0.4ns)
             capabilities: ecc spd-1.1
             configuration: errordetection=ecc rank=2
        *-bank:3
             description: RDIMM DDR4 2666 MHz (0.4ns)
             product: 36ASF2G72PZ-2G6F1
             vendor: Micron Technology
             physical id: 3
             version: 0000,19 07,0F
             serial: 0x20abb8b7
             slot: UOPWR.A100059-Node0-DIMM14
             size: 16GiB
             clock: 2666MHz (0.4ns)
             capabilities: ecc spd-1.1
             configuration: errordetection=ecc rank=2

242

GPU Compute / Accelerators / Re: AMD rendering issues with Debian Bullseye

« on: July 13, 2021, 10:38:35 pm »

I've found I have fewer issues if I don't use gdm at all. Can you do a text boot and startx from there?

243

General OpenPOWER Discussion / Re: risks associated with Xorg / Wayland

« on: July 04, 2021, 02:04:17 pm »

That's what I mean: you can coerce X11 into running the ASPEED at full 1920x1080 but not Wayland, at least not with any means known to me.

244

General OpenPOWER Discussion / Re: risks associated with Xorg / Wayland

« on: July 03, 2021, 11:34:48 am »

I have never been able to get Wayland to run the ASPEED at anything over 1024x768. That said, Xorg is fine with the WX7100 on Fedora 34 (now that the performance issue with graphene is sorted out).

245

Operating Systems and Porting / Re: Ubuntu anomalies on Power

« on: June 27, 2021, 09:07:22 pm »

I salute your attempts at Ubuntu. I suspect it doesn't get a lot of discussion here because not many people run it (?).

246

General CPU Discussion / Re: POWER9 water cooling kit

« on: June 22, 2021, 01:07:17 pm »

Also, what fluid did you use?

247

General CPU Discussion / Re: POWER9 water cooling kit

« on: June 22, 2021, 12:56:29 pm »

Nice temperature reduction! I'm pretty confident all those problems are solvable.

248

Applications and Porting / Re: Firefox WebAssembly (WASM) on ppc64le? Jitsi Meet, Zoom, etc not working

« on: June 16, 2021, 08:56:30 pm »

There is no Wasm support currently. It's being worked on and we'd love contributors (right now it's primarily me with some help from chmeee): https://github.com/chmeeedalf/gecko-dev/commits/master

249