i9 observations

[henryzz]

Originally Posted by axn

Unlikely that 560K result has anything to do with memory. The i9 is a 20MB L3 part so the whole FFT should be running entirely from L3 and shouldn't be hitting RAM at all. Probably just seeing multi-threading overhead (particularly since it is such a small FFT size).

Upto 20/8 = 2.5M FFT (or slight smaller to account for other overheads) should run entirely within L3.

Is it possible the L3 bandwidth limit is being hit?

[axn]

Originally Posted by henryzz

Is it possible the L3 bandwidth limit is being hit?

Quite possible, now that you mention it.

[Xyzzy]

Here is a chart of timings for a 6144K FFT on the i5-10600K.

The orange is 3200 14-14-14-34 memory and the yellow is 4000 18-19-19-39 memory.

We also tested the 560K FFT but as expected it was the same for both memory configurations.

We have already sold the i9 so we are unable to test it with the faster memory.

[henryzz]

Originally Posted by Xyzzy

Here is a chart of timings for a 6144K FFT on the i5-10600K.

The orange is 3200 14-14-14-34 memory and the yellow is 4000 18-19-19-39 memory.

We also tested the 560K FFT but as expected it was the same for both memory configurations.

We have already sold the i9 so we are unable to test it with the faster memory.

It would be interesting to see how many cores and at what speed provide the maximum efficiency(lowest TDP limit) at the minimum clock speed that reaches 130 iter/sec

[Xyzzy]

We have the 10600K from this thread for sale. $225 shipped (US) seems like a fair price. PM us for more info!

[Xyzzy]

This benchmark is from a 12400F set to 65W and DDR5 4800 (40-40-40-76) memory on a B660 motherboard.

Just for fun compare these timings with the 10900K and 10600K earlier in this thread.

Timings for 6144K FFT length (1 core, 1 worker): 15.32 ms.  Throughput: 65.29 iter/sec.
Timings for 6144K FFT length (2 cores, 1 worker):  8.95 ms.  Throughput: 111.74 iter/sec.
Timings for 6144K FFT length (3 cores, 1 worker):  5.71 ms.  Throughput: 175.28 iter/sec.
Timings for 6144K FFT length (4 cores, 1 worker):  4.70 ms.  Throughput: 212.91 iter/sec.
Timings for 6144K FFT length (5 cores, 1 worker):  4.12 ms.  Throughput: 242.86 iter/sec.
Timings for 6144K FFT length (6 cores, 1 worker):  3.71 ms.  Throughput: 269.43 iter/sec.

CPU: 1 × Intel Core i5-12400F 2.5 GHz 6-Core Processor
CPU Cooler: 1 × Noctua NH-C14S 82.52 CFM CPU Cooler
Motherboard: 1 × Asus ROG STRIX B660-I GAMING WIFI Mini ITX LGA1700 Motherboard
Memory: 1 × Corsair Vengeance 32 GB (2 x 16 GB) DDR5-4800 CL40 Memory
Storage: 1 × Samsung 970 Pro 512 GB M.2-2280 NVME Solid State Drive
Video Card: 1 × EVGA GeForce RTX 3060 Ti 8 GB XC GAMING Video Card
Case: 1 × Cooler Master MasterBox NR200 Mini ITX Desktop Case
Power Supply: 1 × Corsair SF 450 W 80+ Platinum Certified Fully Modular SFX Power Supply
Case Fan: 3 × ARCTIC P12 PST CO 56.3 CFM 120 mm Fan

[Mark Rose]

Originally Posted by Xyzzy

This benchmark is from a 12400F set to 65W and DDR5 4800 (40-40-40-76) memory on a B660 motherboard.

Just for fun compare these timings with the 10900K and 10600K earlier in this thread.

Timings for 6144K FFT length (1 core, 1 worker): 15.32 ms.  Throughput: 65.29 iter/sec.
Timings for 6144K FFT length (2 cores, 1 worker):  8.95 ms.  Throughput: 111.74 iter/sec.
Timings for 6144K FFT length (3 cores, 1 worker):  5.71 ms.  Throughput: 175.28 iter/sec.
Timings for 6144K FFT length (4 cores, 1 worker):  4.70 ms.  Throughput: 212.91 iter/sec.
Timings for 6144K FFT length (5 cores, 1 worker):  4.12 ms.  Throughput: 242.86 iter/sec.
Timings for 6144K FFT length (6 cores, 1 worker):  3.71 ms.  Throughput: 269.43 iter/sec.

Twice as fast. Nice.

[Xyzzy]

A mystery CPU:

Timings for 6144K FFT length (1 core, 1 worker): 19.09 ms.  Throughput: 52.38 iter/sec.
Timings for 6144K FFT length (2 cores, 1 worker):  9.71 ms.  Throughput: 103.03 iter/sec.
Timings for 6144K FFT length (3 cores, 1 worker):  6.64 ms.  Throughput: 150.64 iter/sec.
Timings for 6144K FFT length (4 cores, 1 worker):  4.99 ms.  Throughput: 200.51 iter/sec.
Timings for 6144K FFT length (5 cores, 1 worker):  4.12 ms.  Throughput: 242.67 iter/sec.
Timings for 6144K FFT length (6 cores, 1 worker):  3.44 ms.  Throughput: 291.02 iter/sec.
Timings for 6144K FFT length (7 cores, 1 worker):  3.00 ms.  Throughput: 333.33 iter/sec.
Timings for 6144K FFT length (8 cores, 1 worker):  2.63 ms.  Throughput: 379.54 iter/sec.

[kruoli]

Looks like the new Ryzen lineup.

[Xyzzy]

[sdbardwick]

Originally Posted by Xyzzy

You are getting better results than my 5800x3d /x570 setup. I'll have to go see if I ever enabled any performance enhancements (PBO, XMS, etc,)