G Skill ripjaw on AMD?

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The Ripjaw series is always marketed as for the P55 boards and i7 chips, but I think (correct me) they also work in AM3 aswell.

Can anyone confirm this and has anyone got experience using any of the ripjaw series with AMD? How does it hold up?
 
Well as of yesterday I currently now have the G.Skill Ripjaw 4GB (2x2GB) DDR3 PC3-12800C7 1600MHz Dual Channel Kit (F3-12800CL7D-4GBRH) ram, however ...

I am having issues with the settings, leaving the motherboard to auto decect sets the timings incorrectly, it puts them at 9-9-9-25T where as far as I know, SPD should be 7-7-7-24T.

The voltage is set to 1.60 and runs stable ... this is all at 1333MHz but as soon as I try to go to 1666Mhz at 7-7-7-24T as stated on the memory spec the system does not want to know not even at 1.65V.

Now this is a totally new Phenom II 955 build, I might be missing some detail here as I have just come from an old 939 Opteron 146 platform but so far I can't get this ram running at it's stated speeds.

Stu
 
Fireblade2K4 said:
The voltage is set to 1.60 and runs stable ... this is all at 1333MHz but as soon as I try to go to 1666Mhz at 7-7-7-24T as stated on the memory spec the system does not want to know not even at 1.65V.

Now this is a totally new Phenom II 955 build, I might be missing some detail here as I have just come from an old 939 Opteron 146 platform but so far I can't get this ram running at it's stated speeds.
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Which motherboard are you using?
 
Fireblade2K4 said:
I've got the Gigabyte GA-MA790FXT-UD5P AM3 motherboard flashed with the latest F6 bios

Stu
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Ahah! thats why I asked, same motherboard & Bios I am running at this very moment. (havent rigged my i5 rig up yet - havent bought ram yet)

The AM3 Gigabyte motherboards undervolt the ram by between 0.2v - 0.3v

I would up the voltage to 1.70v, with my previous 1600 @ 7-7-7-24 kit they woudnt run at 1.65v I had to up the voltage to 1.70v (1.68v real) to get them working at spec.
 
Well I have the voltage now at 1.65v and they refused to boot at 7-7-7-24, but they are working fine at 8-8-8-24, so yeah I might have a go at going to 1.70v shortly just to see if that does the trick.

And what you mean by undervolt then is that if they are specified to run at 1.65v and my bios says they are running at 1.65v in actual fact they are more like 1.62v or somewhere around there hence undervolted for the 7-7-7-24 timings?

Stu
 
Fireblade2K4 said:
Are you running them at 1333Mhz or 1600Mhz?

Stu
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Running my current ram 1333Mhz @ 7-7-7-24 stock settings with 1.8v the spec of the ram is inbetween 1.8v/1.9v if you look at the link.

The ones that needed 1.7v instead of 1.65v for me to run at rated timings were these http://www.overclockers.co.uk/showproduct.php?prodid=MY-175-OC but if you look below it doesnt really matter what ram you use.
Nelly said:
Just thought I would share some info, if anyone would like me to post the screenshots I can do but I've got nothing to gain by lying but anyway.

Graphics Card: GTX 295

CPU: AMD Phenom II X4 955 Black Edition @ 3.6GHz (3.8Ghz = add extra 2 fps)

Ram: OCZ Blade Series 6GB (3x2GB) DDR3 PC3-16000 Triple Channel (Tested at various timings using 2x2GB) / OCZ Platinum 4GB (2x2GB) DDR3 PC3-10666C7 1333MHz Dual Channel (SAME RESULTS)

Crysis 1600mhz 7-7-7-24 = 54.98 fps

Crysis 1333mhz 7-7-7-24 = 54.43 fps

Crysis 1333mhz 6-6-6-24 = 54.87 fps

Crysis 1333mhz 9-9-9-24 = 52.98 fps

Conclusion

For gaming you don't need the best ram for AM3 rigs, in terms of FPS performance, spend the extra cash on a better graphics card etc.
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Interesting, I've just tried to up the voltage to 1.70v with 7-7-7-24 and it didn't want to know, even tried 1.75v and 1.80v and then had to reset bios - all at 1600Mhz.

I looks like it will run 1600Mhz comfortably but with timings a little looser than those stated on the packaging, I currently have it at 8-8-8-24 @ 1600Mhz and all seems well, shame really but as those results show which you have posted, theres not a lot in it really ... but something for me to keep playing with I guess :)

Stu
 
Fireblade2K4 said:
Interesting, I've just tried to up the voltage to 1.70v with 7-7-7-24 and it didn't want to know, even tried 1.75v and 1.80v and then had to reset bios - all at 1600Mhz.
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Okay up the NB voltage 1 increment & retest again thats not the CPU-NB VID by the way but you can increase that +.100 or +.200 if you got overall instability.

I upped the CPU-NB VID by +.100 & that got my Phenom II X4 955BE stable at 3.4Ghz at stock volts so just like running a 965BE but on lower volts. :D

You also increase the CPU-NB VID when your pushing the HT to around 2600 / 2800 for extra performance.
 
Well after having a go a little bit earlier with other timings, I have fired off an email to Gigabyte asking them for info on this, I am expecting a reply just saying "Its not on the recommended memory list, nothing we can do about it" however I might be pleasantly surprised ... :confused:

Stu
 
Can you let me know how you get on as i have 4gb of ripjaw running fine on a Asus M4A79T but if i put 2 more sticks in to up it to 8gb the pc freezes all the time. Do i need to adjust my settings in the bios.
 
beefybarn said:
Can you let me know how you get on as i have 4gb of ripjaw running fine on a Asus M4A79T but if i put 2 more sticks in to up it to 8gb the pc freezes all the time. Do i need to adjust my settings in the bios.
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I've just read something about making bios changes when going from 2 - 4 sticks on the G.Skill Forum ... just can't remember which thread it was lol.

Might be worth having a look here: http://gskill.us/forum/forumdisplay.php?f=2

Stu
 
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