OCZ Blade ST 1600Mhz don't want to go over 1616Mhz :O

[teribilis]

Hello after having some problems with my previous ram kit, I'm currently overclocking my new config:
Gigabyte 790XTA-UD4
AMD Phenom II X4 955 Be C2
OCZ Blade ST 12800 DDR3 1.65V

At first, I wanted to know ram limits: It is supposed to be run at
7-8-8-24/1600Mhz/1.65V
Okay, the only way to be stable was to put the CPU-NB voltage at 1.3V
But when I put the FSB further than 202, it will be prime95 unstable.
So, is my ram showing its limits at 1616Mhz ??

I saw a topic where a guy was a 1.71V ram voltage but at 6-7-6-21/1600Mhz
Am I making a mistake ?

 

[erocker]

Try adding RAM voltage. 1.71v is perfectly safe with an AMD system. It's possible the RAM you have just isn't capable of doing much overclocking.

 

[teribilis]

Well as I said i saw someone going to 6-7-6-21 1600 at 1.71V
On another topic I can read :"OCZ Blade ST with Elpida BBSE IC's that can reach 1600 6-7-6 easily"
And effectively Elpida BBSE seems to be a terrifying chip.

Even at 1.71V I can't be prime stable at 7-7-7-24 1600Mhz

 

[DanishDevil]

RAM goes through a lot of revisions, and the number 1 revision that they go through is a change of IC's. You might not have BBSE's.

This is a far from complete, and not perfectly updated, but helpful guide:

http://ramlist.i4memory.com/ddr3/

 

[teribilis]

Yes i read this guide and my ram is not listed
I'm becoming crazy, only 16Mhz of overclocking is unbelievable. Do you think that lowering timings might be useful ?

 

[DanishDevil]

Lowering timings means higher performance. They are often referred to as "tighter" timings to imply that they are faster, rather than "lower" timings.

Many kits out there today are binned extremely well so that they won't overclock much, but the manufacturer can offer different price points for RAM.

For your system, I would recommend leaving the RAM as it is, and focus on overclocking the processor. It's a BE, so all you've got to do is raise the multi and voltage on it, and you should be good to go.

Also, keep in mind that Your Mileage May Vary with any overclocking. Just because Joe clocked his sticks to whatever doesn't mean your kit should do the same.

 

[teribilis]

When saying lowering I effectively wanted to say tightening, being french, English can be an obstacle in technical language

I can understand chips are different but i could not imagine that puting the fsb at 203 instead of 200 might make the ram unstable ..

 

[cdawall]

sounds like a 790FX board and C2 chip combined with PSC. what revision are your memory and whats the manuf. date

OCZ Blade SuperTuned 4GB (2 x 2GB) 240-Pin DDR3 SD...

that kit is not BBSE that kit is PSC.

 

[cadaveca]

I can understand chips are different but i could not imagine that puting the fsb at 203 instead of 200 might make the ram unstable ..

You also increase northbridge speed when increasing the cpu's bus, so it might not have anything to do with the memory at all.

 

[teribilis]

sounds like a 790FX board and C2 chip combined with PSC. what revision are your memory and whats the manuf. date

OCZ Blade SuperTuned 4GB (2 x 2GB) 240-Pin DDR3 SD...

that kit is not BBSE that kit is PSC.

Hm I don't really understand the problem. For the revision, I don't know and the manuf date is last january, dimms are brand new and coming from Taiwan after a RMA.

You also increase northbridge speed when increasing the cpu's bus, so it might not have anything to do with the memory at all.

I don't think so because I'm currently prime stable with a 2600Mhz CPU-NB and 3700Mhz CPU with my ram at 1600. Furthermore when I put the FSB at 250 but lower the multi and desynchro the ram at 6.66x to test, everything is prime stable.

 

[timta2]

Do you think that lowering timings might be useful ?

Yes, you might have to back off on the timings to increase clock speed. Sometimes you have to compromise.

Try 8-8-8-24 and see where that gets you.

 

[cdawall]

Hm I don't really understand the problem. For the revision, I don't know and the manuf date is last january, dimms are brand new and coming from Taiwan after a RMA.

ram is PSC what BIOS revision is your board on

 

[teribilis]

I'm on the last F3 bios

 

[sneekypeet]

Try 8-8-8-24 and see where that gets you.

not if they are PSC chips. you need to run at least a +1 tRCD for IC for stability

 

[cdawall]

not if they are PSC chips. you need to run at least a +1 tRCD for IC for stability

they aren't fun on AMD i would bet that the chips wont be stable over 1600 he can try 7-9-7 and see were that goes.

 

[sneekypeet]

I agree, most PSC sticks are super tuned to Intel rigs.

 

[teribilis]

7-9-7-24 1T @1.71V at 1620Mhz is not prime stable :S

 

[sneekypeet]

wait...you're testing ram with Prime? Try memtest86+ ver.4.2

Also are you changing anything else with the ram clocking? 1620 is an odd number, seems to me multiple things are changing at once.

 

[teribilis]

Well, with the HT at 205Mhz, if I put my ram at 6.66x to be sure it is not the cause, I can prime blend during 8 hours. Then, when I get errors at 8x I effectively conclude it is the ram fault.

Effectively it is 1640 and not 1620: 205*8

 

[sneekypeet]

ahh I got ya now.

 

[teribilis]

Hmm 7-9-8-24 at 1640Mhz seems more stable as prime doesn't return errors ftm.
Anyway when I'm benching my ram, results in read, copy, write at 7-8-8-24 1600 are quite the same as 7-9-8-24 1640.
Is the second option preferable as it lets me play a little more with the HT?

 

[cdawall]

Hmm 7-9-8-24 at 1640Mhz seems more stable as prime doesn't return errors ftm.
Anyway when I'm benching my ram, results in read, copy, write at 7-8-8-24 1600 are quite the same as 7-9-8-24 1640.
Is the second option preferable as it lets me play a little more with the HT?

you could try 6-9-6 also and for HT clocking there isn't any reason to do so but you could just drop the ram speed

 

[teribilis]

7-9-7-24 1T @1.71V at 1620Mhz is not prime stable :S

I don't think 6-9-6-24 will be more stable

 

[brandonwh64]

Have you tried CL8?

 

[cdawall]

Have you tried CL8?

thats not the issue PSC and old AMD IMC's don't play together