My ram

[linford585]

Hi, I have G.Skill 1066mhz RAM, 4gb(4x1gb) with Vista x64, model number F2-8500CL5-2GBPK. Timings are CL5-5-5-15, voltages are between 2.0 and 2.1V. I have the voltage manually set in my BIOS to 2.05V. I have a Q9450 CPU, currently overclocked to 3.2ghz, keeping its stock multiplier of 8x, and raising the FSB to 400mhz, giving me a rated FSB of 1600MHZ, instead of my stock FSB of 1333 and stock clock frequency of 2.66.

My concern is, according to CPU-Z (1.48), my RAM's max bandwidth is PC2-6400, 400mhz, while it still knows its model number of F2-8500. In the memory tab, it lists my DRAM frequency as 480-481mhz, and my FSBRAM ratio as 5:6. It also lists my timings correctly, showing 5-5-5-15. Im wondering why its running as PC2-6400 (800mhz) and not PC2-8500 (1066mhz) like it should be. I have found, that while my CPU is overclocked (Prime95 stable for 24 hours), its only stable leaving my ratio on auto, which through CPU-Z I can tell is setting it to 5:6. If I attempt to change it manually (doesn't actually list out ratios in my BIOS, but instead shows corresponding speeds based on the different ratios), my system becomes extremely unstable, and I get lucky if I can even open Prime95 before it crashes or hangs.


System Specs:
BIOSTAR TForce TP45HP (rated FSB of 1600/1333 and a memory standard of DDR2 1200(O.C.)/1066)
ASUS 4870 512mb
Q9450 CPU
G.Skill F2-8500CL5-2GBPK
BFG 650 watt PSU

 

[daft]

well, considering the facts you have given. i say that you should try a 2.1v for your ram if you try to set a higher clock. but even 2v sounds high for ddr2 at your current speed and timings. you may want to try to lossen the timings just a tad to, maybe, 5-5-6-16/17. outside of that, your still pretty close to the rated speed. just live with it.

 

[linford585]

If I leave my RAM voltage on auto, it puts it at only 1.8V, but the same problems occur if I attempt to change my ratio manually. My mobo also doesn't allow me to exactly set my RAM voltage to whatever I want, but instead allows me to add certain amounts of voltage to what it thinks is the stock voltage (in my case 1.8V). I can get it almost exactly at 2.1V (2.096V) however, for some reason it likes to fluctuate when its there, going between 2.096V and 2.15V... I didn't like the voltage being higher than what its made for, so I just set it at 2.05, where it now fluctuates between 2.05 and 2.1. Even if not for the performance, I would still like to know why its only running at PC2-6400 speeds, and would like to fix it.