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G.Skill F4-3000C15Q2-32GRBB Kit

post #1 of 9
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Was looking at the G.Skill F4-3000C15Q2-32GRBB Kit for an upcoming build and I noticed that Newegg has them listed as "Timing 15-16-16-35 " but if you look at their images of the memory (namely the image in the middle that shows two of the ram sticks), the sticker on it says "CL 15-15-15-35 ". Does anyone know for sure which is right timing for this kit?

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231835
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post #2 of 9
G.Skill's product page shows the timings as being 15-16-16-35: http://www.gskill.com/en/product/f4-3000c15q2-32grbb
post #3 of 9
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Quote:
Originally Posted by sabishiihito View Post

G.Skill's product page shows the timings as being 15-16-16-35: http://www.gskill.com/en/product/f4-3000c15q2-32grbb

Thanks. Odd the sticker on the newegg picture has them wrong. Anyway, might I be able to get the eight sticks to run at 15-15-15-35 with a small voltage boost? What is the max "safe" voltage with DDR4 ram? 1.4? 1.5?
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post #4 of 9
DDR4 is pretty new so hard to say but considering how low the volts are. 1.5v is probably safe for 24/7. I doubt you'd even need that much just to tighten 15-16-16 to 15-15-15, assuming you got a kit with xxxx3400 in the serial (=SK Hynix chips underneath). If they're Samsung (xxxx3500) then 15-15-15 won't be possible at 3000.
post #5 of 9
Thread Starter 
Quote:
Originally Posted by sabishiihito View Post

DDR4 is pretty new so hard to say but considering how low the volts are. 1.5v is probably safe for 24/7. I doubt you'd even need that much just to tighten 15-16-16 to 15-15-15, assuming you got a kit with xxxx3400 in the serial (=SK Hynix chips underneath). If they're Samsung (xxxx3500) then 15-15-15 won't be possible at 3000.

Interesting. So are the Hynix chips the early ones and the Samsungs used more recently? Maybe this kit used the Samsung already since it is 15-16-16. G.Skill sells a DDR4 4x4g kit at 3000 and it is rated at 15-15-15, so I don't see why they couldn't find two matching sets at the same speed. I think the Red kit might be Hynix and the Blue kits Samsung. Why are the Samsungs not able to reach 15-15-15?

15-15-15 Hynix Kit?
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231799

15-16-16 Samsung Kit?
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231822
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post #6 of 9
3000 15-16-16 can be Samsung or Hynix that didn't pass 15-15-15 at 1.35v. Samsung just can't tighten down to x-16-16 at DDR4-3000 no matter the voltage from what I've seen.
post #7 of 9
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Quote:
Originally Posted by sabishiihito View Post

3000 15-16-16 can be Samsung or Hynix that didn't pass 15-15-15 at 1.35v. Samsung just can't tighten down to x-16-16 at DDR4-3000 no matter the voltage from what I've seen.

Do you think it would be possible to purchase two of the below 16GB kits and combine for 32GB and still run as 15-15-15?

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231799&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=6146846&SID=i7ce0u7hbj000kb500053
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post #8 of 9
In theory it should work, but G.Skill won't guarantee compatibility/stability with two kits combined.
post #9 of 9
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Quote:
Originally Posted by sabishiihito View Post

In theory it should work, but G.Skill won't guarantee compatibility/stability with two kits combined.

This is DDR2, but in my two current systems, I was able to use two different 2x2GB kits to total 8GB memory in two different computers and was able to get them two run at their rated speeds. I think the blue DDR4 sticks are Samsung so maybe I will e-mail G.Skill and see if they have a 8x4Gb rated at 15-15-15-35 coming out soon. Or try the two 16GB DDR4 3000 red sticks.
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