The Socket 939 Appreciation Club and Knowledgebase [Official] - Page 554 - Overclock.net

**txtmstrjoe** · 07-12-08

Quote:

Originally Posted by Anqt31

Does this number look right?

VS1GB400C3

Yes sir.

What are the stock timings? Corsair (RAM Division) has an unfortunate habit of sometimes using the same model number for something completely different.

One more question: How long ago did you buy the RAM?

EDIT: Never mind. Most sources I've consulted strongly suggest that those Corsairs have Infineon BE-5s. Awesome purchase, for sure!

boonie2 · 07-12-08

Wow thats great for value select

my Sig. 500s have gone to 565 so far , better than my G-Skills

Anqt31 · 07-12-08

Quote:

Originally Posted by txtmstrjoe

Yes sir.

What are the stock timings? Corsair (RAM Division) has an unfortunate habit of sometimes using the same model number for something completely different.

One more question: How long ago did you buy the RAM?

EDIT: Never mind. Most sources I've consulted strongly suggest that those Corsairs have Infineon BE-5s. Awesome purchase, for sure!

Stock: 3-3-3-8
OC'd: 2-3-2-5

I have 2 more sticks of this w/ heat spreaders, I just can't seem to OC as well with that many sticks.

Could I shoot 3 volts through, or would that kill them?

blitz6804 · 07-12-08

I suppose you could shoot more voltage through the RAM, but remember there is always the danger of going too far. Temperatures should not be a problem for you given the spreaders, but expect a shorter lifespan due to the increased stress.

As to four DIMMs, adding voltage will only lessing the problem. It will not remove it. I have also found that overvolting the processor and/or northbridge both assist stability a fuzz when dealing with 4 GB of RAM. However, you will need to face the facts that 4 GB simply cannot clock as well as 2 GB. You will either need to reduce the speed, or the timings, or both, to get the system stable.

(Though, look into Poser's Story for the counterpoint to my pessimism.)

boonie2 · 07-12-08

Quote:

Originally Posted by Poser

Pioneer, Guadian, Blitz... my fellow RAM wranglers:

I think I have a made a significant breakthrough (with much help, suggestions and advice) in the my personal ram dilemma. The following 4 settings have had a great deal of influence on the ability to POST, Boot into vista and gain stability:

Tref: there is a great chart you can find @ xtreme and/or DIY forums mapping out the Tref rates accross several intervals (100,133,166, 200mhz and 1.95, 3.9, 7.8 and 15.6us) created by Dracula. The chart was made for NF4 LP boards, but is universal in its information. Remember, this parameter sets the rate at which a cell is "re-charged" so its data does not decay... and can be either too loose or tight, preventing stability and/or boot

DRAM drive strength: This controls the strength of the memory bus' signal strength. The settings are either normal (even values) or weak (odd values) with the higher numbers either indicating a weak value close to normal, or a normal value at the highest level of strength

DRAM data drive strength: (lvl 1-4): This is used to boost the signal strength of the memoru data line. From my reading, the higher density your ICs, (i.e. dual sided dimm) the greater the signal strength needed at higher clocks. The levels are used to reduce strength, 1 being the weakest and 4 being the strongest. (I found lvl 3 best for me)

Max Async Latency: For me this has proved the holy grail of settings to stabilize 4gb dimm with the a64 IMC There is very limited information I have found regarding this setting, but from what I have garnered, this setting controls the asynchronous latency from the data line being pumped from the processors IMC to the furthest (physical location) DIMM on your board. In plain english, it controls the data pump traffic (like a crossing guard) to allow data to reach the furthest DIMM before issuing another signal. (this could be completely wrong, so I take no responsiblity....nor am I an expert of any kind in anything other than nose picking). By relaxing my MAL to 11ns I am currently priming with the settings you can observe below:

Unbelievable, I know. Before I couldn't even boot into DDR320.... now I am priming at my previous most stable overclock @ DDR486. Should this pass all tests, I might even up the vCore and try for a DDR500 24/7 stable on air 3.0ghz OC with 4GB RAM!!!!!!

I also may re-experiment with just 2gigs to see what kind of craziness I can get...shattering previous overclocks.

NOTE: upping your MAL, will get you stable at higher clocks....but at the cost of latency and max bandwidth

ALSO: I don't care what anyone tells you ... there is a huge performance difference between 4gb and 2gb in vista. While priming, I could barely surf the web with 2gb. Now, I have multiple browsers open, foobar running, priming and don't even notice a hitch in my system....just saying

why so much vcore ? looks like hes using 1.44 to get 2.9 ?

blitz6804 · 07-12-08

If I remember 'The Joe' right, CCBBE is an excellent stepping in terms of speed, but a very bad one in terms of vCore.

Unlike LCBQE which is an excellent stepping in terms of both. (A statement which both Thlnk3r and Pioneer will swear to.)

GuardianOdin · 07-12-08

Quote:

Originally Posted by boonie2

why so much vcore ? looks like hes using 1.44 to get 2.9 ?

same as mine. I can boot in and run 3.1Ghz "not exactly stable" but CCBBE chips require higher Vcore than the others. That is one of the reason I doubt I will ever be stable at 3.1Ghz with aircooling. Now at 2.9Ghz I have to run 1.425V...3Ghz I need 1.525V

blitz6804 · 07-12-08

Yes Boonie, I realize you are running only 1.37 V for your 3 GHz. Let us say you got the "Golden Chip" of your stepping.

boonie2 · 07-12-08

thats good info. yet another fact I didnt know .Thanks

SerenityKill3r · 07-12-08

Quote:

Originally Posted by blitz6804

Yes Boonie, I realize you are running only 1.37 V for your 3 GHz. Let us say you got the "Golden Chip" of your stepping.

Wow thats impressive...whats the max you've got Boonie??

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