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FAQ: Memory: High Speeds vs. Tight Timings

post #1 of 27
Thread Starter 
I know many people wonder, "Should I push my RAM to its highest speed and sacrifice timings or keep the speed down and have tight timings?" I also wondered about this question and I ran some benchmarks to figure it out. All these tests were made under the most similar conditions as i possibly could, the cpu was at 3.0ghz @1.25v, the ram had 2.2 volts flowing through it, all these tests were conducted with under 2% background CPU load, and with the same processes open at the time of testing.. These are my results:

sorry the excel sheet did not carry over but the information for each setting is listed in this order: Speed, Timings, Superpi 1M time, PCMark05 score, Everest memory read speed, Everest memory write speed, Everest memory latency, performance test 6.1 memory mark score, performance test 6.1 passmark rating

1000mhz at 3:4 ratio, 5-5-5-15, 17.375, 6958, 7358Mb/s, 2280Mb/s, 52.8ns, 713.8, 128.5
830mhz at 4:5 ratio, 4-4-4-12, 17.265, 6824, 6283Mb/s, 2084Mb/s, 54.0ns, 710.2, 127.8
667mhz at 1:1 ratio, 3-3-3-6, 17.484, 6974, 5073Mb/s, 1852Mb/s, 52.9ns, 700.2, 126.0

Based on these findings it is very hard to tell which one offers better performance because they are nearly identical results. But based on these tiny differences it appears that the highest speed you can achieve seems to be the highest performing option. I say this because the highest speed performed on par or beyond the other two in real world type benchmarks while also achieving the best non-real world score (memory read/write times). But the only way you can be sure for yourself is to try out many configurations and see which one you like the most. The difference between these is not noticeable so it really becomes a matter of personal preference.

I'm not sure if this is official enough or detailed enough to be an FAQ but it does address a frequently asked question. I may expand on these tests in the future if necessary.
post #2 of 27
nice! rep+ good info
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My Rig
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post #3 of 27
How about 4-4-3-5 @ 1,000mhz?
post #4 of 27
Thread Starter 
there is no way that my memory could do that. i dont want to burn it out with like 2.5 volts just trying to test something like this. but i assumed that would have by far the best scores
post #5 of 27
what speed RAM did you use for this test? was it your DDR2 800mhz? did you overclock and then underclock it for the test?
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RiG
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post #6 of 27
Thread Starter 
yes i used my patriot extreme performance DDR2 800 4-4-4-12 RAM with 2.2 volts in all the tests
post #7 of 27
so you managed to OC your RAM to 1000mhz... WOW - nice one!!!

what are your temps when oc'ing your RAM that far? in your opinion, is Patriot good RAM? i've just ordered the signature line with the built-in heatspreaders...
RiG
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RiG
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post #8 of 27
Quote:
Originally Posted by kevg73 View Post
there is no way that my memory could do that. i dont want to burn it out with like 2.5 volts just trying to test something like this. but i assumed that would have by far the best scores
It's easy, both of my G.Skill kits can do it and currently doing it:



http://valid.x86-secret.com/show_oc?id=174685

Except my HKs are doing it at 2.35v and my HZs at 2.30v. Nothing overkilling.
post #9 of 27
Thread Starter 
i might give it a try in a while but i am having some issues with my rig and i am back at stock right now. i might take it back up to 3.0 and try those timings tonight
post #10 of 27
Nice work. Rep+
 
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Optiplex 790
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Some shit.
(7 items)
 
CPUMotherboardGraphicsRAM
E7200 3.6GHZ 9*400 1.25v Gigabyte P35-DS3R BFG 9800GTX OC 2*1GB Kingston HyperX D9GKX 1200MHZ C5, 2.0V 
Hard DriveOptical DriveOSMonitor
80GB WD SATAII NEC 3550A DL DVD+/-RW Win XP Home HP W2007 
KeyboardPowerCaseMouse
Microsoft Digital Media Pro XClio Goodpower 500W Cooler Master Centurion 5 Logitech G5 
CPUGraphicsRAMHard Drive
i5 2400 Sapphire HD6670 LP 4GB DDR3 500GB 7200RPM 
OSMonitor
Windows 7 Professional 2 x Dell 2408WFP 
CPUGraphicsRAMHard Drive
i5 3317U HD4000 4GB DDR3 128GB SSD 
Optical DriveOSMonitor
Who needs one? OSX 10.8 11" 1366x768 
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