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Message boards : Number crunching : Effect of single vs dual rank on task duration

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Michael Millerick
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Posts: 794
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Credit: 305,869,540
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Discovered 1 mega primeFound 3 primes in the 2020 Tour de PrimesFound 2 primes in the 2021 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,023,600)Cullen LLR Ruby: Earned 2,000,000 credits (2,016,794)ESP LLR Jade: Earned 10,000,000 credits (17,987,203)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,032,353)PPS LLR Jade: Earned 10,000,000 credits (19,222,385)PSP LLR Ruby: Earned 2,000,000 credits (2,012,651)SoB LLR Ruby: Earned 2,000,000 credits (2,031,453)SR5 LLR Ruby: Earned 2,000,000 credits (2,085,475)SGS LLR Ruby: Earned 2,000,000 credits (2,035,177)TRP LLR Ruby: Earned 2,000,000 credits (2,740,707)Woodall LLR Ruby: Earned 2,000,000 credits (2,046,592)321 Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,440,175)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,911,344)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,077,092)PPS Sieve Emerald: Earned 50,000,000 credits (50,200,870)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,034,014)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,070,774)AP 26/27 Sapphire: Earned 20,000,000 credits (20,227,947)WW Emerald: Earned 50,000,000 credits (50,104,000)GFN Emerald: Earned 50,000,000 credits (60,702,126)PSA Emerald: Earned 50,000,000 credits (52,866,806)
Message 145711 - Posted: 27 Nov 2020 | 19:05:45 UTC

This current challenge is the first time in a long time that I ran WUs that would be bottlenecked by memory bandwidth on my systems. I have a 7600k and a 9700k, and normally see the 9700k have twice the throughput as the 7600k, which is to be expected given that the 9700k has twice as many cores as the 7600k.

The 7600k has 4x4=16GB single rank modules at 3200GHz. The 9700k has 2x8=16GB single rank modules at 3200GHz.

During this challenge, I was getting the following results for Woodall:
7600k: ~64000 second run time and ~228000 second CPU time
9700k: ~56000 second run time and ~404000 second CPU time

I would have expected the 9700k to be slightly more than twice as fast as the 7600k given the doubling in number of cores and the difference in generations, but that isn't the case here.

I am making the assumption that the difference is that the 7600k has 4x4 single rank modules, which in dual channel allows for the two sets of dual channel modules to be treated as two separate ranks and allows one to be written to while the other is read from. The 9700k is not able to do this, and reads will block writes and vise-versa.

I just ordered a second set of matching memory to expand my 9700k, and will report back in a week or so with my results. Hopefully it doubles the speed of the system on large tasks.
____________

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Discovered 6 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de PrimesFound 6 primes in the 2020 Tour de PrimesFound 5 primes in the 2021 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (8,774,878)Cullen LLR Turquoise: Earned 5,000,000 credits (5,903,451)ESP LLR Turquoise: Earned 5,000,000 credits (7,207,880)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Double Bronze: Earned 100,000,000 credits (100,863,217)PSP LLR Jade: Earned 10,000,000 credits (15,223,714)SoB LLR Sapphire: Earned 20,000,000 credits (20,019,367)SR5 LLR Sapphire: Earned 20,000,000 credits (25,605,231)SGS LLR Turquoise: Earned 5,000,000 credits (7,360,621)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Sapphire: Earned 20,000,000 credits (21,424,369)Woodall LLR Turquoise: Earned 5,000,000 credits (8,171,820)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,236,219)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (76,969,144)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)WW Sapphire: Earned 20,000,000 credits (34,040,000)GFN Emerald: Earned 50,000,000 credits (77,695,028)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 145713 - Posted: 27 Nov 2020 | 19:44:40 UTC - in response to Message 145711.
Last modified: 27 Nov 2020 | 19:46:25 UTC

Some timings from my systems for comparison. All CPUs are running stock apart from the 8086k which has turbo disabled as it is LLR unstable otherwise, and the 3700X which has a small positive voltage offset otherwise it is unstable. Running one task with threads = cores.

Timings are an eyeball average of longer Woo units.

Dual channel systems

8c 3700X 2x8GB SR 3600 28ks
4c 5775C 2x8GB DR 2400 59ks
4c 6700k 2x8GB DR 3200 50ks
6c 8086k 4x16GB DR 3200 41ks (turbo disabled)


Quad channel systems

6c 5820k 4x4GB SR 2666 45ks
6c 5930k 8x4GB SR 2133 41ks
12c 7920X 8x8GB SR 3000 16ks

SR/DR applies to individual modules. If there is 1 or 2 DPC can be seen from configuration vs channels.

I'd expect your 7600k to perform similar to my 6700k. There is some 5% clock difference but both CPUs seem to be running slower than comparable systems I have. Looks like you're also running GPU units? Maybe that is making up the difference. Bit late for the current challenge, but if you wanted to max the challenge points discontinuing GPU might have helped somewhat.

Anyway, in the past I did do some testing on 6700k comparing 3200 DR vs 3000 SR, I saw some 25%+ difference between them. I don't have the numbers to hand, but I also compared 3200 DR vs 3600 SR, and the 3200 DR easily won in performance. Doing DR or 2 SR modules per channel does help, but don't necessarily expect a doubling in performance.

Pavel Atnashev
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Joined: 11 Aug 17
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Credit: 3,097,778,395
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Discovered 3 mega primesEliminated 2 conjecture "k"s321 LLR Jade: Earned 10,000,000 credits (11,980,856)Cullen LLR Emerald: Earned 50,000,000 credits (71,772,873)ESP LLR Double Amethyst: Earned 1,000,000,000 credits (1,232,694,920)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (67,073)PPS LLR Double Bronze: Earned 100,000,000 credits (133,968,831)PSP LLR Double Silver: Earned 200,000,000 credits (273,829,354)SoB LLR Double Amethyst: Earned 1,000,000,000 credits (1,010,504,273)SR5 LLR Double Bronze: Earned 100,000,000 credits (100,345,041)TRP LLR Double Silver: Earned 200,000,000 credits (257,876,275)Woodall LLR Ruby: Earned 2,000,000 credits (4,756,356)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (24,029)
Message 145715 - Posted: 27 Nov 2020 | 20:10:52 UTC

I have tested a lot of different configurations, and double rank is definitely better than single rank when a task requires main memory access. Of course, fitting everything in L3 cache is the best, but when you need memory, go for double rank.

Profile j.sheridanProject donor
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Joined: 21 Mar 11
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Credit: 2,162,661,540
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Discovered 2 mega primesFound 4 primes in the 2021 Tour de PrimesFound 2 mega primes in the 2021 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,011,712)Cullen LLR Jade: Earned 10,000,000 credits (10,025,728)ESP LLR Jade: Earned 10,000,000 credits (10,176,490)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (10,020,580)PPS LLR Sapphire: Earned 20,000,000 credits (24,680,982)PSP LLR Jade: Earned 10,000,000 credits (10,055,994)SoB LLR Sapphire: Earned 20,000,000 credits (33,151,496)SR5 LLR Jade: Earned 10,000,000 credits (10,885,368)SGS LLR Jade: Earned 10,000,000 credits (10,007,143)TRP LLR Jade: Earned 10,000,000 credits (10,009,531)Woodall LLR Jade: Earned 10,000,000 credits (10,039,527)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,019,388)Cullen/Woodall Sieve (suspended) Double Silver: Earned 200,000,000 credits (265,102,350)PPS Sieve Double Gold: Earned 500,000,000 credits (547,992,812)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,801,812)AP 26/27 Emerald: Earned 50,000,000 credits (93,546,934)WW Double Gold: Earned 500,000,000 credits (684,336,000)GFN Double Silver: Earned 200,000,000 credits (396,846,530)
Message 145716 - Posted: 27 Nov 2020 | 20:12:45 UTC - in response to Message 145715.
Last modified: 27 Nov 2020 | 20:16:26 UTC

Ryzen is about 10% faster with dual rank which using currently available ram means you need to be using 2x16GB as 8GB ram is all single rank.

Pavel Atnashev
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Joined: 11 Aug 17
Posts: 55
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Credit: 3,097,778,395
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Discovered 3 mega primesEliminated 2 conjecture "k"s321 LLR Jade: Earned 10,000,000 credits (11,980,856)Cullen LLR Emerald: Earned 50,000,000 credits (71,772,873)ESP LLR Double Amethyst: Earned 1,000,000,000 credits (1,232,694,920)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (67,073)PPS LLR Double Bronze: Earned 100,000,000 credits (133,968,831)PSP LLR Double Silver: Earned 200,000,000 credits (273,829,354)SoB LLR Double Amethyst: Earned 1,000,000,000 credits (1,010,504,273)SR5 LLR Double Bronze: Earned 100,000,000 credits (100,345,041)TRP LLR Double Silver: Earned 200,000,000 credits (257,876,275)Woodall LLR Ruby: Earned 2,000,000 credits (4,756,356)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (24,029)
Message 145717 - Posted: 27 Nov 2020 | 20:15:46 UTC

Some of my setups are quad channel dual rank. That's the best for things like P-1 sieving.

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Discovered 8 mega primesFound 5 primes in the 2020 Tour de PrimesFound 2 mega primes in the 2020 Tour de PrimesFound 4 primes in the 2021 Tour de PrimesFound 2 mega primes in the 2021 Tour de Primes321 LLR Sapphire: Earned 20,000,000 credits (20,020,701)Cullen LLR Sapphire: Earned 20,000,000 credits (20,174,451)ESP LLR Sapphire: Earned 20,000,000 credits (23,496,803)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (20,197,125)PPS LLR Emerald: Earned 50,000,000 credits (61,332,177)PSP LLR Sapphire: Earned 20,000,000 credits (26,060,865)SoB LLR Sapphire: Earned 20,000,000 credits (26,978,901)SR5 LLR Sapphire: Earned 20,000,000 credits (20,183,763)SGS LLR Sapphire: Earned 20,000,000 credits (20,482,069)TRP LLR Sapphire: Earned 20,000,000 credits (20,307,419)Woodall LLR Sapphire: Earned 20,000,000 credits (22,371,625)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,380,527)Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (744,531)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,007,004)PPS Sieve Double Gold: Earned 500,000,000 credits (570,848,729)TRP Sieve (suspended) Bronze: Earned 10,000 credits (21,181)AP 26/27 Sapphire: Earned 20,000,000 credits (20,845,708)WW Double Gold: Earned 500,000,000 credits (918,432,000)GFN Double Silver: Earned 200,000,000 credits (479,188,020)
Message 145720 - Posted: 28 Nov 2020 | 3:08:44 UTC - in response to Message 145716.
Last modified: 28 Nov 2020 | 3:12:06 UTC

Ryzen is about 10% faster with dual rank which using currently available ram means you need to be using 2x16GB as 8GB ram is all single rank.

On my two 9960X which are quad channel, I have 4 x 8Gb ram.
I should swap those for 4 x 16Gb?
My 9980XE has 4 x 16Gb.
I know my 9900K (dual channel) has 32 Gb - I would need to look to find out if it is 2 or 4 sticks of ram.

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Credit: 2,162,661,540
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Discovered 2 mega primesFound 4 primes in the 2021 Tour de PrimesFound 2 mega primes in the 2021 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,011,712)Cullen LLR Jade: Earned 10,000,000 credits (10,025,728)ESP LLR Jade: Earned 10,000,000 credits (10,176,490)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (10,020,580)PPS LLR Sapphire: Earned 20,000,000 credits (24,680,982)PSP LLR Jade: Earned 10,000,000 credits (10,055,994)SoB LLR Sapphire: Earned 20,000,000 credits (33,151,496)SR5 LLR Jade: Earned 10,000,000 credits (10,885,368)SGS LLR Jade: Earned 10,000,000 credits (10,007,143)TRP LLR Jade: Earned 10,000,000 credits (10,009,531)Woodall LLR Jade: Earned 10,000,000 credits (10,039,527)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,019,388)Cullen/Woodall Sieve (suspended) Double Silver: Earned 200,000,000 credits (265,102,350)PPS Sieve Double Gold: Earned 500,000,000 credits (547,992,812)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,801,812)AP 26/27 Emerald: Earned 50,000,000 credits (93,546,934)WW Double Gold: Earned 500,000,000 credits (684,336,000)GFN Double Silver: Earned 200,000,000 credits (396,846,530)
Message 145723 - Posted: 28 Nov 2020 | 9:10:07 UTC - in response to Message 145720.

Ryzen is about 10% faster with dual rank which using currently available ram means you need to be using 2x16GB as 8GB ram is all single rank.

On my two 9960X which are quad channel, I have 4 x 8Gb ram.
I should swap those for 4 x 16Gb?
My 9980XE has 4 x 16Gb.
I know my 9900K (dual channel) has 32 Gb - I would need to look to find out if it is 2 or 4 sticks of ram.

First thing to do would be to confirm ram type. Grab a copy of cpu-z if you don't already have one and check the SPD tab.
Second, it may be obvious but if you're going to buy new ram make sure what you're buying is actually dual rank. That information can be hard to find pre-purchase. Not all manufacturers mention it.

Profile dannyridel
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Joined: 3 Feb 19
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Credit: 18,674,415
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Discovered 1 mega prime321 LLR Silver: Earned 100,000 credits (443,148)Cullen LLR Silver: Earned 100,000 credits (112,212)ESP LLR Silver: Earned 100,000 credits (255,803)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (509,419)PPS LLR Ruby: Earned 2,000,000 credits (2,000,571)PSP LLR Silver: Earned 100,000 credits (100,559)SoB LLR Gold: Earned 500,000 credits (533,625)SR5 LLR Silver: Earned 100,000 credits (108,281)SGS LLR Silver: Earned 100,000 credits (401,211)TRP LLR Silver: Earned 100,000 credits (146,999)Woodall LLR Silver: Earned 100,000 credits (117,864)321 Sieve (suspended) Gold: Earned 500,000 credits (506,814)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (30,033)PPS Sieve Ruby: Earned 2,000,000 credits (2,808,043)AP 26/27 Amethyst: Earned 1,000,000 credits (1,091,610)WW Turquoise: Earned 5,000,000 credits (5,716,000)GFN Ruby: Earned 2,000,000 credits (3,419,507)PSA Silver: Earned 100,000 credits (373,034)
Message 145724 - Posted: 28 Nov 2020 | 9:29:09 UTC - in response to Message 145723.

Ryzen is about 10% faster with dual rank which using currently available ram means you need to be using 2x16GB as 8GB ram is all single rank.

On my two 9960X which are quad channel, I have 4 x 8Gb ram.
I should swap those for 4 x 16Gb?
My 9980XE has 4 x 16Gb.
I know my 9900K (dual channel) has 32 Gb - I would need to look to find out if it is 2 or 4 sticks of ram.

First thing to do would be to confirm ram type. Grab a copy of cpu-z if you don't already have one and check the SPD tab.
Second, it may be obvious but if you're going to buy new ram make sure what you're buying is actually dual rank. That information can be hard to find pre-purchase. Not all manufacturers mention it.

Is Crucial's Ballistix 2x8GB dual rank?
____________
SHSIDElectronicsGroup@outlook.com

waiting for a TdP prime...
Proth "SoB": 44243*2^440969+1


mackerelProject donor
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Joined: 2 Oct 08
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Discovered 6 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de PrimesFound 6 primes in the 2020 Tour de PrimesFound 5 primes in the 2021 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (8,774,878)Cullen LLR Turquoise: Earned 5,000,000 credits (5,903,451)ESP LLR Turquoise: Earned 5,000,000 credits (7,207,880)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Double Bronze: Earned 100,000,000 credits (100,863,217)PSP LLR Jade: Earned 10,000,000 credits (15,223,714)SoB LLR Sapphire: Earned 20,000,000 credits (20,019,367)SR5 LLR Sapphire: Earned 20,000,000 credits (25,605,231)SGS LLR Turquoise: Earned 5,000,000 credits (7,360,621)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Sapphire: Earned 20,000,000 credits (21,424,369)Woodall LLR Turquoise: Earned 5,000,000 credits (8,171,820)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,236,219)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (76,969,144)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)WW Sapphire: Earned 20,000,000 credits (34,040,000)GFN Emerald: Earned 50,000,000 credits (77,695,028)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 145725 - Posted: 28 Nov 2020 | 9:47:05 UTC - in response to Message 145724.

Pretty much all modern 8GB modules are single rank now. Some were dual rank way back in the early days (2015 or earlier).

With 16GB modules, it is getting more complicated as I hear they are also going single rank, so it is not guaranteed just having a 16GB module is dual rank.

Equivalent to having dual rank modules is running two single rank modules per channel. Running 4x8GB on dual channel systems (or even 4x4GB if you can find smaller modules and don't need the capacity) may be a safer option than going random 16GB modules now.

Michael Millerick
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Joined: 4 Feb 09
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Credit: 305,869,540
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Discovered 1 mega primeFound 3 primes in the 2020 Tour de PrimesFound 2 primes in the 2021 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,023,600)Cullen LLR Ruby: Earned 2,000,000 credits (2,016,794)ESP LLR Jade: Earned 10,000,000 credits (17,987,203)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,032,353)PPS LLR Jade: Earned 10,000,000 credits (19,222,385)PSP LLR Ruby: Earned 2,000,000 credits (2,012,651)SoB LLR Ruby: Earned 2,000,000 credits (2,031,453)SR5 LLR Ruby: Earned 2,000,000 credits (2,085,475)SGS LLR Ruby: Earned 2,000,000 credits (2,035,177)TRP LLR Ruby: Earned 2,000,000 credits (2,740,707)Woodall LLR Ruby: Earned 2,000,000 credits (2,046,592)321 Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,440,175)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,911,344)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,077,092)PPS Sieve Emerald: Earned 50,000,000 credits (50,200,870)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,034,014)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,070,774)AP 26/27 Sapphire: Earned 20,000,000 credits (20,227,947)WW Emerald: Earned 50,000,000 credits (50,104,000)GFN Emerald: Earned 50,000,000 credits (60,702,126)PSA Emerald: Earned 50,000,000 credits (52,866,806)
Message 145976 - Posted: 1 Dec 2020 | 18:15:57 UTC

An update here after installing the additional RAM.

My 9700k went from
~56000 second run time and ~404000 second CPU time
to
~44500 second run time and ~336000 second CPU time

From just that change. It isn't as dramatic as I hoped, but it will have to do.
____________

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Discovered 2 mega primesFound 4 primes in the 2021 Tour de PrimesFound 2 mega primes in the 2021 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,011,712)Cullen LLR Jade: Earned 10,000,000 credits (10,025,728)ESP LLR Jade: Earned 10,000,000 credits (10,176,490)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (10,020,580)PPS LLR Sapphire: Earned 20,000,000 credits (24,680,982)PSP LLR Jade: Earned 10,000,000 credits (10,055,994)SoB LLR Sapphire: Earned 20,000,000 credits (33,151,496)SR5 LLR Jade: Earned 10,000,000 credits (10,885,368)SGS LLR Jade: Earned 10,000,000 credits (10,007,143)TRP LLR Jade: Earned 10,000,000 credits (10,009,531)Woodall LLR Jade: Earned 10,000,000 credits (10,039,527)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,019,388)Cullen/Woodall Sieve (suspended) Double Silver: Earned 200,000,000 credits (265,102,350)PPS Sieve Double Gold: Earned 500,000,000 credits (547,992,812)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,801,812)AP 26/27 Emerald: Earned 50,000,000 credits (93,546,934)WW Double Gold: Earned 500,000,000 credits (684,336,000)GFN Double Silver: Earned 200,000,000 credits (396,846,530)
Message 145979 - Posted: 1 Dec 2020 | 19:05:06 UTC - in response to Message 145976.

A 20% improvement is massive.

Michael Millerick
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Credit: 305,869,540
RAC: 325,494
Discovered 1 mega primeFound 3 primes in the 2020 Tour de PrimesFound 2 primes in the 2021 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,023,600)Cullen LLR Ruby: Earned 2,000,000 credits (2,016,794)ESP LLR Jade: Earned 10,000,000 credits (17,987,203)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,032,353)PPS LLR Jade: Earned 10,000,000 credits (19,222,385)PSP LLR Ruby: Earned 2,000,000 credits (2,012,651)SoB LLR Ruby: Earned 2,000,000 credits (2,031,453)SR5 LLR Ruby: Earned 2,000,000 credits (2,085,475)SGS LLR Ruby: Earned 2,000,000 credits (2,035,177)TRP LLR Ruby: Earned 2,000,000 credits (2,740,707)Woodall LLR Ruby: Earned 2,000,000 credits (2,046,592)321 Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,440,175)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,911,344)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,077,092)PPS Sieve Emerald: Earned 50,000,000 credits (50,200,870)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,034,014)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,070,774)AP 26/27 Sapphire: Earned 20,000,000 credits (20,227,947)WW Emerald: Earned 50,000,000 credits (50,104,000)GFN Emerald: Earned 50,000,000 credits (60,702,126)PSA Emerald: Earned 50,000,000 credits (52,866,806)
Message 145980 - Posted: 1 Dec 2020 | 19:42:39 UTC - in response to Message 145979.

A 20% improvement is massive.

I was hoping for 50%. I should try running on just 4/8 cores and seeing how the times compare between the two computers to rule out time being lost due to the additional parallelism.
____________

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