Can't have 2 DDR on P4B533e?

[ubermu]

I have a 1.6a oced @ 155 FSB. I have a 512 ddr corsair 2700 currently in there and want to add a same specced mushkin piece. But it crashes minutes into any game I play, so what's the deal? Mem ratio is 1:1, ratio is 3337

 

[THUGSROOK]

the p4b533 doesnt like 2 sticks of ram.

effectively ~ 2 sticks of pc2700 will not run its rated specs in that board
2x pc2700 will top out at about 300ddr, +/-.
2x pc3000 will top out at about 333ddr, etc.

 

[ubermu]

that would be fine with me but apparently it crashes my system instead of just lowering the spec. My mem ratio is 1:1 at 155 so shouldn't it still perform ok? I don't mind a little slower ram so long as it works

 

[THUGSROOK]

the board is only rated for 266ddr ~ and they mean it

if you only use 1 stick it can go upto 454ddr :Q

better ram will get you farther ~ but nothing will run its rated specs w/ 2 sticks past 300ddr.

 

[ubermu]

it runs for a while and crashes a few minutes into any 3d game. If I lowered my clock to 150 would it work alright?

 

[ubermu]

bump :< thugs you there?

 

[THUGSROOK]

i cant give you a definate yes or no....
the only way to know for sure is to run memtest86 and find out

 

[oldfart]

Maybe a little extra Vdimm for good measure?

 

[Budman]

Originally posted by: THUGSROOK
the p4b533 doesnt like 2 sticks of ram.

effectively ~ 2 sticks of pc2700 will not run its rated specs in that board
2x pc2700 will top out at about 300ddr, +/-.
2x pc3000 will top out at about 333ddr, etc.

Sorry thugs but I have run 2X pc2700 512megs sticks fine all the way up to 180mhz using the trick to enable 3:4.

I have 1 samsung pc2700 & 1 crucial pc2700 & they work just fine at their rated speed and beyond,but you must place them in the 2 slots near the cpu because the 3rd slot doesnt like double sided ram.


I also have run it at 166mhz with 1:1 ratio with no problems at all,so you can use 2 sticks just fine as long as you use the 2 slots near the cpu.

 

[THUGSROOK]

i couldnt run 2 sticks past 333ddr in either ratio....
some ppl can run higher ~ some cant even run that high.

everyone is going to get different results, the only way find out is to test.

 

[ubermu]

hmm i'll try it out I was using it in slots 1 and 3, hopefully #2 is the trick. brb.
as far as the memtest it failed twice while tyring it, just stuck at less than 33%

 

[Budman]

Originally posted by: ubermu
hmm i'll try it out I was using it in slots 1 and 3, hopefully #2 is the trick. brb.
as far as the memtest it failed twice while tyring it, just stuck at less than 33%

Yes it states in the manual you must use slot 1 & 2 for double sided ram.

 

[RalfHutter]

I've been running two 512MB sticks of XMS3200 Corsair at DDR400 on my P4B533E for the last 9-10 months 100% stable. Timings have to be CL2.5-3-3-3-7, Vdimm is 2.7V. With just one 512MB stick I can get DDR426 with the same timings and Vdimm.

 

[THUGSROOK]

ok good, then the 2 of you can explain to him how youve managed that

 

[Mikki]

Originally posted by: THUGSROOK
ok good, then the 2 of you can explain to him how youve managed that

Yeah, my board wouldn't do it either...

 

[oldfart]

Funny thing...I just messed with this today. I built a PC for a buddy awhile ago using a P4B533. He just added a 2nd stick of Corsair 512 3200C2. He was running 158 FSB, 3:4, DDR421, 2.5,3,2,7 2.6 Vdimm. With the 2nd stick, it locked when launching a game. Tried 2.5,3,3,7 2.7 Vdimm, no go. Had to back it down to 1:1 and now its fine.

He'll be getting my Albatron 845PE once I get a my IC7 going.

 

[Budman]

Originally posted by: THUGSROOK
ok good, then the 2 of you can explain to him how youve managed that

Nothing special,insert ram into slot1 & 2 and that's it.

1 is crucial pc2700 and the other is a generic pc2700 with samsung chips,worked fine from the start. going on 9 months here too.

 

[ubermu]

In slot 2, and it works ;P Thanks for the help guys I appreciate it you are my <3rs