Well, my system's old now, but works like a charm. I was looking to upgrade the ram, and have a little problem:
SysteM: amd 3800+ x2. (939)
Mobo: msi k8n neo 4 platinum (nforce-4 ultra chipset)
and system use: gaming, photoshop, and gaming!
OS: Vista32, XP32 Current Ram: 2x512 - Corsair VS513MB400 DDR-400 = 200MHz @ CL=2.5, tRCD=3, tRP=3)
What i have available to upgrade: Kingston valueSelect Ram, prolly 2.5-3-3 or 3-3-3 ... cant say, coz its with a frnd.
Will 4x512 work? (for total 2g ram).. with those different timings?
Or Suppose if the timings are same, then two corsairs and two kingston... wud they be ok togather?
OR Should i go for 2x1Gb Kingston, also available. And get rid of my 2x512 corsairs.
Ive read that using 4x512 on amd reduces 400 to 333, and there is a slight performance drawback in 4x512 as compared to 2x1g. BUT that is not to big a drop... so what will it be?
different timings work ok 99% of the time. I have 2 DDR2 667(rated 5,5,5,15) and 2 sticks of DDR2 800(4,4,4,12). With a little voltage it all runs at 667 4,4,4,10.
The timings are looser on DDR2 and even more so on DDR3. They compensate with faster speeds. in some benches DDR 400 can outdo DDR2 800. but in general the extra speeds and optimization in the memory controller make up for the latency difference.
I'm currently running 2gigs, 2x512MB corsair and 2x512MB patriot.
The corsair work as low as 2-2-2-5, and the patriot can barely do 2.5-3-3-7
Both are running at 2.5-3-3-7 with no problems at all, dual channel and even slightly overclocked.
As long as your motherboard accepts both brands and they can run at timings supported by both, there shouldn't be a problem.
Splendid! IF they work, then thats good Well, the link Maziar gave, even tho old, shows that 2x1g is better than 4x512, in some cases. So, ill see what i can come up with, and will post the final results of what ever i get so all can compare
PS: Im into overclocking cpu/gpu but havent tried rams as yet.. seems a bit too complicated / risky.. and needs a lot more homework
lets see, if i increase reference clock from 200 (stock) to 220, i go from 2.2G to 2.42G (cpu multiplier 11x) I also increase HT bus frequency from 1G to 1.1G (HT multiplier 5x) ... and memory bus freq (ddr) from 400 to 440.
So by going from 400 to 440, i wud need to lower what timings to what new numbers.... ?