christakakis

Hello, I have an Acer Aspire 5 A515-51G which had 8GB total RAM (4GB soldered + 4GB in slot). Maximum RAM capacity is 20GB so I recently purchased an 16GB (after being sure that it fits the criteria and characteristics). Now I have 20GB total running in Flex Mode as far as I'm concerned (CPU Z says dual so that's a sign). My problem is that before changing the slot I run some tests (UserBenchMark and PassMark PerformanceTest) in order to see the difference of Before-After. PassMark PerformanceTest: I found out that Memory Write has gotten worse (11676 Before - 7487 After) as well as Database Operations (2938 Before - 2249 After). UserBenchMark: Before my RAM scored a 62.2% and After 44.3% (with significantly dropped values at Multi core and Single core scores). Also while runnig the test I saw memory latency getting a higher value than the previous test. I don't think that the motherboard is botching the timings / speed, because in CPU Z everything seems good. Before I buy the 16GB Corsair RAM I checked everything to match with the previous one in order to work fine. Anyone have a clue why my RAM upgrade brought me worse performance? Is it because it runs 4GB+4GB Dual Channel and the rest 12GB Single Channel? Can I do something to minimize that gap? I will attach photos of my Before-After results in order to understand better. Thank you in advance!

Hello, I have an Acer Aspire A515-51G and I want some opinions before I upgrade my RAM. Right now the laptop has 8GB (4GB soldered on motherboard and 4GB switchable). I'm thinking of removing the 4GB and placing a 16GB, in order to have 20GB (which is the maximum supported for this motherboard). Current RAM run at 2133Hz with CAS 15 and runs at Dual Channel. My two final options are Corsair and G.Skill 1) https://www.corsair.com/eu/en/Categories/Products/Memory/Mainstream-Memory/Corsair-Memory-16GB-(1x16GB)-DDR4-SODIMM-2133MHz-C15-Memory-Kit/p/CMSO16GX4M1A2133C15 [70€ where I live - ~79$] 2) https://www.gskill.com/specification/2/197/1537264131/F4-2133C15S-16GRS-Specification [58‎€ where I live - ~65$] My quenstion is do you think that I'll face any problems if I place a 16GB with the current 4GB soldered. Because they won't run at Dual Channel anymore (it's called flex-mode if I'm not mistaken). Will it be better to have 8GB Dual Channel or 20GB Flex-Mode? Lastly, do you suggest one of the two manufacturers, did anyone faced a similar problem? Thanks in advance, Panagiotis, Greece