GSkill F2-8500CL5D-4GBTD - Trident - Low voltage

[Don_Dan]

The strange thing is that I can run the sticks @ the same speed, no matter how many sticks I install on the mobo (1 stick, 2 sticks , 4sticks...) 550Mhz 5-5-5-15 seems to be the limit of my setup. I don't know what is holding my OC back. No matter what voltage I apply to the sticks (1.8, 1.9... ), they run at the same max speed. No matter what vNB... I am going crazy... VTT? divider? GTL? ... I will read some posts around to find out what is failing...

My guess is you're finding the limit because they are well-binned and the better chips were used in the other kits. Could you please post a screen of 8GB running at your max overclock with MemSet open? I would like to see the timings and compare them.

My Super*Talent sticks below are ProMOS, and they are stock at 2.2v. I've run them up to 2.25v for benches, and these are binned for low timings.
I've booted 1100 5-5-5-15 @ 2.2v, but once again not stable. Again, thats probably my CPU.
Highest memtest86+ stable CAS 4 is DDR2-955 4-4-4-10.

What you posted are 1GB ProMOS-sticks, I have two different revisions of those which are already a little different from their characteristics, but you can't compare them to the 2GB-sticks, as those are most likely totally different chips and you'll encounter more problems when overclocking the high-capacity stuff. Even if they use the same ProMOS chips nowadays for 2GB and 4GB kits, the 4GB kits will hit their limit way earlier most of the time.
Well binned ProMOS can reach up to 600MHz CL5 in 4GB flavour though, but that is very very rare ( ask G.Skill ).

Powerchips generally won't do cas4 past 900. The usually max out 1100-1140 5-5-5-15 2.0v
More voltage usually won't help them go higher although you can put 2.2v into them.

This is not entirely true too, but is only correct for lower-binned 4GB PSC kits. PSC can reach very high frequencies too, but of course only if it's heavily binned. In 2GB kits PSC can reach up to 600MHz CL4.


I don't want to offend you two, I just want to show that binning is a very important factor to look at when comparing 4GB kits, but the problem is that we don't know how well binned the memory is that we want to compare.