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Ram Compatibility

post #1 of 3
Thread Starter 
I just wanted to ask the experts if it is ok putting 2 sticks of cas latency of 5 and 2 more sticks of cas latency of 4?

one of the pairs are these:

http://www.newegg.com/Product/Produc...82E16820145175

These are cas 5 but apparently were designed to be very OC'able. The other pair are cas 4 so when i overclocked my system, i manually set my timings to 4-4-4-12 and upped my ram voltage to 2.1V.

So far prime95 has given me a problem (I OCed my E6600 to 3.0Ghz using multi x9 and a bus speed of 333MHz). *Edit* And also in CPU-Z its showing Command Rate (CR) 2T



On a side note, the stickers on the ram list 4-4-4-12 with 2.1V. Is this to mean that I should not go over these values and if I set my ram timings manually, these are the MAX values I should have?
post #2 of 3
Well first off if you set all four sticks in there at default then it should use the 5-5-5- and 2.1v basically taking the lower of the spd's.

You need to get memtest and use that to test your ram before you get into windows to keep from killing your install. CHeck the download section.

Once you get memtest I would use each set individually and check to see what they can handle by increasing the speed of the ram with say 5-5-5-15 and 2.1v, then make sure the other set can do this at the speeds of the other set. Then you can try to run all four at close to that speed and timings. (LOL hope this makes sense).

Generally D9 ddr2 cant handle more then 2.2v for a very long time. I dont know what those have in them but just to be safe in general for 24/7 use stay at or under 2.2v. Some ram can handle 2.3 to 2.4 but I wouldnt recommend it.

Also check out some of the ram ocing guides and read up on that stuff to help you out.

And the best thing to do is use all the same sticks but you can play with this if you allready have all four sticks of two types.
xeon
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xeon
(13 items)
 
  
CPUMotherboardGraphicsRAM
W3520 x58 ud5 9800gtx+ tridents 
Hard DriveOSMonitorPower
wd black x2 W7 64 acer 23 ocz 850hx 
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haf932 
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post #3 of 3
And really low CAS latencies are the most overrated and useless thing to ever hit the OCing community... They really help nothing except memory benchmarks. If I were you, I'd just run them both 5-5-5 to ensure stability.
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