4-4-4-12 and 5-5-5-15..which is faster

[toreses]

I do not know which is faster..
and I saw that for most ddr 1066.. IT IS 5-5-5-18..AND it is getting bigger along with ddr 1120 or 1333...

 

[mwmorph]

lower latencies is faster though it doesn't affect performance all that much. 4-4-4-12 is technically 80% of the latency of 5-5-5-15 but it wont net 20% more performance, maybe a couple to a few percentage points here and there, depending on application of course. Heavy memory users will benefit the most like compression or encoding files.

Think of it like this, those numbers represent 0-60 acceleration times for a car while speed is more like a horsepower rating. One, lower is better, the other, higher.

These articles are old but it's the best i could find:
http://techreport.com/articles.x/8966
http://www.pcworld.com/article...72-page,1/article.html
http://www.tbreak.com/reviews/...pu&id=333&pagenumber=1

 

[imported_wired247]

In general the one with the fastest clock speed will be the fastest. Not 100% true, but it is a good rule of thumb.

 

[mwmorph]

Originally posted by: wired247
In general the one with the fastest clock speed will be the fastest. Not 100% true, but it is a good rule of thumb.

Also depends on wht your cpu will run. If you buy 1200mhz ran but you're running it at 1000mhz, unless you overclock, it'll be worthless.

 

[Tweakin]

Most good DDR2-800 chips can run at DDR 1000 at 5-5-5-15-2T, and the performance difference between these chips and the high-end (read pricy) chips is only a couple of frames in games and synthetic benchmarks.

 

[nefariouscaine]

Originally posted by: Tweakin
Most good DDR2-800 chips can run at DDR 1000 at 5-5-5-15-2T, and the performance difference between these chips and the high-end (read pricy) chips is only a couple of frames in games and synthetic benchmarks.

Tweakin
Golden Member - looking prettty leet there Tweakin
Posts: 1337

- but OP there is little difference between running the various "regular" latencies 4-4-4-12 or 5-5-5-15

you can get a slight added performance boost by playing with other "non standard" timings but I suggest you avoid that as it can be very confusing - I'm actually in need to edit my rig in sig once more as I'm running my 4 gigs at DDR2-1050 at 5-5-5-5 (might try for CAS4 one of these days...)

I get higher memory bench scores but other than that I see little difference than running slower memory. Bear in mind this is all on the same FSB - once that speed changes its a whole different story