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2 Types of ram, 1.9v and 2.3v causing conflicts

post #1 of 8
Thread Starter 
I have 2 types of ram that I want to use together. I have 2x2gb sticks of kingston ddr2 1066 5-5-5-15 sticks rated at 2.3 volts, and another 2x2gb sticks of Patriot G series ddr2 800 5-5-5-12 rated at 1.9 volts. Since I'm using a p45 motherboard, my 1066 sticks are underclocked to 850, which I really don't care too much about, I just take advantage of the lower clock speeds to tighten the timings. My problem is that I can run these 4 sticks together just fine at stock cpu speeds, but once I start overclocking my cpu, I have to either boost the ram voltage to 2.3 to keep my kingston sticks stable, but that might fry my patriot stick, since they're .4v over what they're rated at. If I run at 1.9v, the patriots run fine, but the kingston sticks are so undervolted that I can't even boot. Is there a way to control the voltage individually for each pair of ram slots, or am I screwed?

My rig: Rig 1: Q9450 @ 3.4 ► P45-UD3R ► GTX 275 ► 2x2gb 850 ► 2x Raptor 150 Raid 0 ► Truepower Quattro 1kw ► WC'd ► 3d Aurora 570
post #2 of 8
No, you can't run the two pairs at different volts. Either sell one set and get the matching pair (if you need 8GB) or just run one pair, probably the Patriot G's.
post #3 of 8
they all have to run the same voltage. pick which pair runs better with your OC. the 800mhz sticks wont be able to do more than 400FSB without overclocking your ram. my corsair 800mhz sticks are running at 900mhz right now, but i cant push my e8400 unless i get better ram or just pull them out and run my gskill sticks only (they are 1066)

if the 800mhz sticks will run at your goal OC, then keep those for the lower voltage. you may find that the 1066 sticks are better for your OC.

8gb of ram is overkill, specially on a 775 rig. dont be mad if you just sell one kit and pocket the $50.
    
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post #4 of 8
Quote:
Originally Posted by gymenii View Post
No, you can't run the two pairs at different volts. Either sell one set and get the matching pair (if you need 8GB) or just run one pair, probably the Patriot G's.
The above is correct.
You can match timings and speed from different sets of RAM but not voltage.
You will need to choose one voltage and get RAM to match it.
Micro Mule
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Micro Mule
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post #5 of 8
Thread Starter 
Darn, that sucks. Time to sell a set of Kingston sticks I guess. I'm keeping the patriot sticks because they have tighter stock timings, and they keep up just fine with my CPU @ 4 ghz, which is the wall anyways. Thanks for the help everyone.
post #6 of 8
i would go with the higher clocked sticks. 5-5-5-12 vs 5-5-5-15 isnt that big of a difference. if you see a difference at all, the ram that runs 266mhz faster will be better and will allow more OCing, like if you get a different CPU later. moar is better! lol
    
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post #7 of 8
Thread Starter 
Well, since I'm using a P45 board, the RAM overclocking methods are a bit different. You can't just pick a random number, you have to use multiples of the fsb. I'm stuck with 850 mhz, 1200 mhz, and something ridiculous along the lines of 1366 mhz. My kingston sticks can't do 1200 mhz, even though they have D9GKX IC's, which are *supposed* to be pretty good. Either way, I end up running 850 mhz, so might as well go for the sticks that have lower stock timings. I'll do some extensive testing tomorrow to see which can get the tightest timings at 850 mhz and just keep that set.

I have a set of 4x1 tracers that I used to have in this rig, but 1 of them died. Once that RMA goes through, if the new stick can keep up with the other 3, I'm sticking to the tracers, they can do 1200 4-5-5-14 stable 24/7 @ 2.2v.

I'm probably building a new rig in about a year, so I'm just trying to have this one last as long as possible without upgrades. As long as this rig holds out and runs fine, I'm happy.
Edited by Comrade Leo - 1/21/11 at 4:12pm
post #8 of 8
i have a P45 board also and i have issues with my 800mhz RAM keeping up with my FSB. right now i have my 800mhz sticks clocked at 900mhz and they arent stable any higher than that so my FSB is stuck at 450mhz, even tho my Gskill sticks (1066) and my CPU can handle much higher than 450mhz FSB.

if you have the 1066 sticks and you only need to run them at 850mhz or 900mhz, you can tighten the timings if you have it running below its rated speed.
    
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