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Message boards : General discussion : More Memory?

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Profile Troy WiggintonProject donor
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Joined: 18 Jun 17
Posts: 15
ID: 899264
Credit: 12,994,507
RAC: 0
321 LLR Silver: Earned 100,000 credits (105,132)Cullen LLR Silver: Earned 100,000 credits (146,642)ESP LLR Silver: Earned 100,000 credits (143,452)Generalized Cullen/Woodall LLR Silver: Earned 100,000 credits (141,752)PPS LLR Silver: Earned 100,000 credits (113,357)PSP LLR Silver: Earned 100,000 credits (226,488)SoB LLR Silver: Earned 100,000 credits (304,166)SR5 LLR Silver: Earned 100,000 credits (112,993)SGS LLR Silver: Earned 100,000 credits (115,230)TRP LLR Silver: Earned 100,000 credits (126,265)Woodall LLR Silver: Earned 100,000 credits (139,528)321 Sieve Silver: Earned 100,000 credits (236,635)Generalized Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (151,841)PPS Sieve Amethyst: Earned 1,000,000 credits (1,985,519)AP 26/27 Silver: Earned 100,000 credits (169,806)GFN Turquoise: Earned 5,000,000 credits (7,906,171)PSA Gold: Earned 500,000 credits (869,530)
Message 111344 - Posted: 11 Nov 2017 | 21:07:26 UTC

I have an open DDR3 memory slot in my computer with 16GB currently installed. Would adding memory be helpful in sieving or searching?

Profile Rafael
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Joined: 22 Oct 14
Posts: 885
ID: 370496
Credit: 334,085,845
RAC: 3,106
321 LLR Turquoise: Earned 5,000,000 credits (8,236,942)Cullen LLR Turquoise: Earned 5,000,000 credits (8,028,695)ESP LLR Turquoise: Earned 5,000,000 credits (8,027,771)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (7,259,087)PPS LLR Turquoise: Earned 5,000,000 credits (7,722,618)PSP LLR Turquoise: Earned 5,000,000 credits (7,137,796)SoB LLR Turquoise: Earned 5,000,000 credits (6,941,728)SR5 LLR Turquoise: Earned 5,000,000 credits (7,186,115)SGS LLR Turquoise: Earned 5,000,000 credits (7,263,666)TRP LLR Turquoise: Earned 5,000,000 credits (8,751,781)Woodall LLR Turquoise: Earned 5,000,000 credits (7,119,125)321 Sieve Jade: Earned 10,000,000 credits (10,033,828)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,037,204)PPS Sieve Jade: Earned 10,000,000 credits (10,305,147)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,053)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,030,160)AP 26/27 Jade: Earned 10,000,000 credits (12,282,634)GFN Sapphire: Earned 20,000,000 credits (29,911,497)PSA Double Bronze: Earned 100,000,000 credits (170,761,999)
Message 111345 - Posted: 11 Nov 2017 | 21:48:00 UTC - in response to Message 111344.

I have an open DDR3 memory slot in my computer with 16GB currently installed. Would adding memory be helpful in sieving or searching?

For sieving, no.

For prime research, more RAM is useless by itself, but "better RAM" could be useful, depending on what you have. How are those 16gb distributed, is it 2x8, 8+2x4 or single 16gb?

Profile Crun-chiProject donor
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Posts: 3008
ID: 50683
Credit: 59,175,698
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Eliminated 1 conjecture "k"Found 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Silver: Earned 100,000 credits (229,492)Cullen LLR Silver: Earned 100,000 credits (110,733)PPS LLR Turquoise: Earned 5,000,000 credits (7,173,525)PSP LLR Silver: Earned 100,000 credits (104,385)SoB LLR Silver: Earned 100,000 credits (106,117)SR5 LLR Silver: Earned 100,000 credits (139,802)SGS LLR Amethyst: Earned 1,000,000 credits (1,325,207)TRP LLR Gold: Earned 500,000 credits (626,755)Woodall LLR Silver: Earned 100,000 credits (122,944)321 Sieve Silver: Earned 100,000 credits (104,900)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,599)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (515,556)PPS Sieve Jade: Earned 10,000,000 credits (11,855,975)TRP Sieve (suspended) Silver: Earned 100,000 credits (255,612)AP 26/27 Ruby: Earned 2,000,000 credits (2,583,960)GFN Sapphire: Earned 20,000,000 credits (23,334,026)PSA Turquoise: Earned 5,000,000 credits (7,522,050)
Message 111346 - Posted: 11 Nov 2017 | 22:48:23 UTC - in response to Message 111344.

I have an open DDR3 memory slot in my computer with 16GB currently installed. Would adding memory be helpful in sieving or searching?


If you have only one module of 16 GB adding one more ( same type and size) can be good ( my personal experience : adding one more module increase speed of LLR for about 25%)

____________
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Profile SkligmundProject donor
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Joined: 15 Sep 05
Posts: 230
ID: 765
Credit: 541,666,833
RAC: 187
Discovered 1 mega prime321 LLR Gold: Earned 500,000 credits (575,085)Cullen LLR Gold: Earned 500,000 credits (537,617)ESP LLR Gold: Earned 500,000 credits (526,508)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (623,091)PPS LLR Jade: Earned 10,000,000 credits (14,012,216)PSP LLR Gold: Earned 500,000 credits (986,873)SoB LLR Ruby: Earned 2,000,000 credits (2,694,757)SR5 LLR Amethyst: Earned 1,000,000 credits (1,439,237)SGS LLR Turquoise: Earned 5,000,000 credits (5,945,628)TPS LLR (retired) Gold: Earned 500,000 credits (775,455)TRP LLR Gold: Earned 500,000 credits (519,190)Woodall LLR Gold: Earned 500,000 credits (599,339)321 Sieve Bronze: Earned 10,000 credits (20,575)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (21,586)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (527,131)PPS Sieve Double Silver: Earned 200,000,000 credits (422,220,022)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (118,924)TRP Sieve (suspended) Bronze: Earned 10,000 credits (43,251)AP 26/27 Turquoise: Earned 5,000,000 credits (7,684,066)GFN Emerald: Earned 50,000,000 credits (81,295,207)
Message 111348 - Posted: 12 Nov 2017 | 0:24:12 UTC - in response to Message 111346.

That is usually attributed to dual channel memory capabilities, which increases memory throughput speed.
____________

Profile Michael GoetzProject donor
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Joined: 21 Jan 10
Posts: 13513
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Credit: 236,922,854
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Found 5 primes in the 2021 Tour de PrimesFound 5 mega primes in the 2021 Tour de PrimesThe "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 6 mega primesFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,822,730)Cullen LLR Ruby: Earned 2,000,000 credits (3,624,591)ESP LLR Turquoise: Earned 5,000,000 credits (5,021,269)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Jade: Earned 10,000,000 credits (16,008,485)PSP LLR Turquoise: Earned 5,000,000 credits (5,197,957)SoB LLR Sapphire: Earned 20,000,000 credits (34,291,181)SR5 LLR Jade: Earned 10,000,000 credits (10,007,110)SGS LLR Ruby: Earned 2,000,000 credits (3,252,256)TRP LLR Turquoise: Earned 5,000,000 credits (5,084,329)Woodall LLR Ruby: Earned 2,000,000 credits (2,911,985)321 Sieve Jade: Earned 10,000,000 credits (10,061,196)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (22,885,121)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Jade: Earned 10,000,000 credits (10,118,303)GFN Emerald: Earned 50,000,000 credits (76,733,355)PSA Jade: Earned 10,000,000 credits (12,445,029)
Message 111349 - Posted: 12 Nov 2017 | 0:31:29 UTC

To clarify, you have enough memory. You can run all of PrimeGrid's apps comfortably in 16 GB. Simply having more memory won't make things faster.

However, depending on the exact configuration of your motherboard, adding additional memory sticks may improve performance. This is because, under the right conditions, your computer can use multiple sticks of memory simultaneously. This essentially increases the speed of the memory in your computer, and for the Generfer and LLR apps memory speed is very important.

You'll have to tell us more about your computer: What kind of motherboard you have (make and model), the CPU model, the number of memory sticks you already have, what speed they are, and which memory slots they occupy on the motherboard. With that information, we may be able to tell you whether adding additional memory will be beneficial.

In particular, if your motherboard is currently accessing memory in single-channel mode, and adding a second memory stick allows it to operate in dual channel mode, then you may see a noticeable improvement in performance. However, if your motherboard is already using all available memory channels, adding more memory will not improve performance.
____________
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Profile Troy WiggintonProject donor
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Joined: 18 Jun 17
Posts: 15
ID: 899264
Credit: 12,994,507
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321 LLR Silver: Earned 100,000 credits (105,132)Cullen LLR Silver: Earned 100,000 credits (146,642)ESP LLR Silver: Earned 100,000 credits (143,452)Generalized Cullen/Woodall LLR Silver: Earned 100,000 credits (141,752)PPS LLR Silver: Earned 100,000 credits (113,357)PSP LLR Silver: Earned 100,000 credits (226,488)SoB LLR Silver: Earned 100,000 credits (304,166)SR5 LLR Silver: Earned 100,000 credits (112,993)SGS LLR Silver: Earned 100,000 credits (115,230)TRP LLR Silver: Earned 100,000 credits (126,265)Woodall LLR Silver: Earned 100,000 credits (139,528)321 Sieve Silver: Earned 100,000 credits (236,635)Generalized Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (151,841)PPS Sieve Amethyst: Earned 1,000,000 credits (1,985,519)AP 26/27 Silver: Earned 100,000 credits (169,806)GFN Turquoise: Earned 5,000,000 credits (7,906,171)PSA Gold: Earned 500,000 credits (869,530)
Message 111351 - Posted: 12 Nov 2017 | 2:05:23 UTC - in response to Message 111349.

Motherboard : don't know
CPU : AMD FX(tm)-8300 Eight-Core Processor, 3300 Mhz, 4 Core(s), 8 Logical Processor(s)
Memory Sticks : 1 8GB, 2 4GB, 1 open slot. At 1333 MHz.


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Joined: 16 Feb 10
Posts: 769
ID: 55391
Credit: 696,046,522
RAC: 2,255
Discovered 2 mega primesFound 1 prime in the 2018 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,477,467)Cullen LLR Gold: Earned 500,000 credits (776,297)ESP LLR Ruby: Earned 2,000,000 credits (3,120,351)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,056,207)PPS LLR Sapphire: Earned 20,000,000 credits (21,475,108)PSP LLR Turquoise: Earned 5,000,000 credits (5,027,818)SoB LLR Sapphire: Earned 20,000,000 credits (25,095,209)SR5 LLR Turquoise: Earned 5,000,000 credits (6,110,877)SGS LLR Ruby: Earned 2,000,000 credits (3,477,744)TRP LLR Turquoise: Earned 5,000,000 credits (7,025,303)Woodall LLR Amethyst: Earned 1,000,000 credits (1,693,614)321 Sieve Emerald: Earned 50,000,000 credits (50,256,050)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,571,178)Generalized Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (50,009,610)PPS Sieve Double Silver: Earned 200,000,000 credits (316,075,694)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,165,888)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,071,454)AP 26/27 Turquoise: Earned 5,000,000 credits (6,616,128)GFN Emerald: Earned 50,000,000 credits (53,042,140)PSA Double Bronze: Earned 100,000,000 credits (102,762,384)
Message 111359 - Posted: 12 Nov 2017 | 14:47:46 UTC - in response to Message 111351.

Motherboard : don't know
CPU : AMD FX(tm)-8300 Eight-Core Processor, 3300 Mhz, 4 Core(s), 8 Logical Processor(s)
Memory Sticks : 1 8GB, 2 4GB, 1 open slot. At 1333 MHz.

This CPU has an integrated memory controller which supports 2 memory channels. I doubt there would be any motherboards for it that have only 1 channel. Assuming that the motherboard is dual-channel, then using 3 of 4 memory slots is guaranteed to be using both memory channels already.

BUT whether the system has a balanced memory layout of 8 GB in one channel and 4+4 GB in the other, is yet to be determined. Did the system initially have just 8 GB (4+4) and the 8 GB stick was added later? If so, it's possible the memory layout is unbalanced - one of the 4 GB sticks was not moved to the other channel. Then there is 12 GB in one channel and 4 GB in the other.

recoil44Project donor
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Joined: 20 Dec 15
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ID: 433037
Credit: 411,347,492
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Discovered 1 mega primeFound 1 prime in the 2019 Tour de PrimesFound 1 mega prime in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,019,377)Cullen LLR Turquoise: Earned 5,000,000 credits (5,064,170)ESP LLR Turquoise: Earned 5,000,000 credits (5,001,303)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,094,139)PPS LLR Turquoise: Earned 5,000,000 credits (6,021,807)PSP LLR Turquoise: Earned 5,000,000 credits (5,085,124)SoB LLR Turquoise: Earned 5,000,000 credits (5,042,051)SR5 LLR Turquoise: Earned 5,000,000 credits (5,077,248)SGS LLR Turquoise: Earned 5,000,000 credits (5,000,448)TRP LLR Turquoise: Earned 5,000,000 credits (5,003,404)Woodall LLR Turquoise: Earned 5,000,000 credits (5,035,352)321 Sieve Turquoise: Earned 5,000,000 credits (5,061,436)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,012,148)PPS Sieve Double Bronze: Earned 100,000,000 credits (108,556,313)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,089,865)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,297,782)AP 26/27 Emerald: Earned 50,000,000 credits (50,153,415)GFN Double Bronze: Earned 100,000,000 credits (106,065,222)PSA Emerald: Earned 50,000,000 credits (67,666,890)
Message 111360 - Posted: 12 Nov 2017 | 15:34:54 UTC - in response to Message 111351.

https://www.piriform.com/speccy

Speccy will tell you everything you need to know including what MB you have and if your RAM is working in single or dual channel.

You can also drill down to the specifics like what the part number is for each of your RAM sticks if you wanted to buy matching sticks.

Note: it shows actual RAM speed so don't freak out when it says your 1333 DDR (Double Data Rate) is running about 666 MHz.

Message boards : General discussion : More Memory?

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