Overclocking i7 930 - Possible to take full advantage of 1866 RAM?

Toggle sidebar Toggle sidebar
T

t1337dude

Reputable
Sep 5, 2014
10
0
4,510
Hey, I'm an OC amateur. I got new RAM lately (16gb rated at 1866). To get my memory speeds that high in the BIOS (in addition to my current OC to 4.0Ghz), I had to increase the Memory Multiplier to 10x and the Uncore multiplier to 20x. Doing this though made it so I had to increase my QPI/VTT voltages a lot (to 1.45v, I was warned not to go past 1.4v), which left my system usable still but ultimately unstable.

Otherwise I can leave my memory multi at 8x and my Uncore at 16x, which is perfectly stable at a low QPI/VTT (1.35v), but then my RAM is only running at 1660Mhz. I'd rather have my RAM overclocked than underclocked. Does anyone have tips on what settings I should be trying to fiddle with so I can get a stable system in addition to OCing my RAM? Or should I forget about speed at this point and worry more about timings? In which case...what's the best way to fiddle with the timings and testing them out to make sure they're stable?

I'm going to be testing in the mean time. I assume QPI/VTT has to be pretty high to support 1900Mhz+ in any circumstance? Is it only a heat issue? Or should I not take my VTT to any more than 1.45v if I have the temperature to spare?

EDIT: I discovered this thread - http://www.xtremesystems.org/forums/showthread.php?207972-Core-i7-Vdimm-VTT-Graveyard-D

It looks like I can put it to 1.6v. I suppose I'll give it a shot.
 
Solution
killer pc g15
higher clock speeds do indeed make more performance then a lower latency. but your cpu is not very good with high memory frequencys. I had a i7 950 myself and I could oc my cpu more when I had lower memory frequencys en lower timings then the other way around. and ocing ur cpu gives a much more performance boost.
and tripple channel memory makes a big differance. run a benchmark with 1 channel and then 1 with 2 channels.
Sort by date Sort by votes
killer pc g15

killer pc g15

Distinguished
Apr 29, 2010
229
0
18,760
the best thing you can do is run them at 1600mhz and try to get the lowest posible timings.
you have 16gb?? how is that posible with tripple channel? you need 3 ddr3 dimms 3x1=3gb 3x2=6gb 3x4=12gb
using tripple channel increases the bandwith from 128bit to 192bit so you will have a 50% memory performance increase with the same memory clockspeel and timings
 
Upvote 0 Downvote
T

t1337dude

Reputable
Sep 5, 2014
10
0
4,510
There are no appealing 3x kits that I've seen that offer the amount of memory I seek, so I'm not using triple channel right now. I might grab a third stick down the line but it seems kind of redundant at this point, I don't see the point in spending ~$70 for something I know I'd barely notice in terms of performance gains, and I think the age of DDR3 will soon pass.

I managed to get a stable overclock so I have them running at 1900Mhz instead of 1600Mhz. How much of a performance gain would I see if I ran it at 1600Mhz and focused on timing instead? Are there any articles out there that compare RAM speed against timings?

In this thread (http://www.tomshardware.com/answers/id-1922024/ram-latency-clock-speed.html) , it's said that "Thus, high speed memory almost always outperforms low latency memory; this is especially true when high speed memory is accompanied by low latency (often at the cost of higher supply voltage)."

So shouldn't I be shooting for clock speed instead of latency? A lot of people think latency is better for AMD, clock speed is better for Intel (http://www.overclock.net/t/774999/memory-speed-vs-latency/10).
 
Upvote 0 Downvote
killer pc g15

killer pc g15

Distinguished
Apr 29, 2010
229
0
18,760
higher clock speeds do indeed make more performance then a lower latency. but your cpu is not very good with high memory frequencys. I had a i7 950 myself and I could oc my cpu more when I had lower memory frequencys en lower timings then the other way around. and ocing ur cpu gives a much more performance boost.
and tripple channel memory makes a big differance. run a benchmark with 1 channel and then 1 with 2 channels.
 
Upvote 0 Downvote
Solution
P

paubarbar

Reputable
Feb 2, 2015
1
0
4,510
Hi t1337dude, I have the same cpu as you. But only I have 6GB of 1333MHz ram running on 1066MHz. I'd like to buy 16GB of 1600Mhz or higher, but I don't know what to do.

Did it work well do OCing? It's stable? Can you tell me if you followed some tutorial?

Thx (Sorry for my english).
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom