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Old August 11, 2010, 01:59 PM
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Greetings all, we have finally settled in to our new place and I'm looking for some help from the moderate/heavy overclockers. I'll be placing an order tonight or tomorrow for some ram. I'd prefer blue/black gskills but not mandatory to go with the blue/black theme for the new rig that will be under construction shortly. I'll be using the unlocked i7 875k, msi P55-GD80 for the motherboard and it will be cooled with a CoolIt boreas. I'll be pushing these components above my norm, so I need the ram to play nice.

This will be my first venture into overclocking where I won't just just pick a moderate speed, test, then set it and forget it. Any ram suggestions would be very helpful.

Thanks.
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Last edited by mo' power; August 11, 2010 at 02:11 PM.
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Old August 11, 2010, 05:33 PM
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DDR3-1600 is currently the sweet spot for most people. There are plenty of kits, if you're on blue/black then have a gander at these...

Corsair XMS3 Dominator 4GB DDR3 2X2GB DDR3-1600 CL 7-8-7-20 Core i5 i7 Dual Channel Memory Kit - DirectCanada
or
G.SKILL F3-12800CL8D-4GBRM Ripjaws PC3-12800 4GB 2X2GB DDR3-1600 CL8-8-8-24 Core i5 Memory Kit - DirectCanada
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Old August 11, 2010, 05:41 PM
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Do you know what level you'll need your ram to reach?

I've currently got a set of Gskill Pi series 6-8-6-24 1600 sticks running at 1760 7-8-7-24 (1t) using 1.65V.
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Old August 11, 2010, 05:57 PM
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with an 875K (unlocked CPU multi) you really have limitless options for memory. you won't need super high clockable memory, and to be honest, it really plays little role...even in benchmarks. the only time high memory clocks really show up is in Super Pi...and even then, QPI clocks of the CPU are more important, because without QPI clocks, memory bandwidth is useless on Clarkbar setups.

i am not familiar with that particular MB, so i can't comment on how well it runs certain memory ratios or its available QPI multipliers, but assuming everything runs like it should, the DDR3-1600 sticks being shown should be plenty. i haven't been on top of memory lately but this kit looks to be pretty flexible as well...

G.SKILL F3-16000CL9D-4GBRH Ripjaws PC3-16000 4GB 2X2GB DDR3-2000 CL9-9-9-27 = $140
NCIX.com - Buy G.SKILL F3-16000CL9D-4GBRH Ripjaws PC3-16000 4GB 2X2GB DDR3-2000 CL9-9-9-27 Core i5 Memory Kit - F3-16000CL9D-4GBRH In Canada.

it will do DDR3-2000 no problem and should run DDR3-1800 at 8-8-8, DDR3-1600 at 7-7-7 as well based on what i can see from the net. might be worth it to spend $20 more for a kit that can cover all speed ranges at acceptable timings to give you more flexibility with BCLK to max out QPI.

HTH
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Old August 11, 2010, 07:29 PM
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I second everything 3oh6 said. Since he is the most talented overclocker in all canada. The kit he sugest is also decent and at a good price. I would go for it. Have fun with your little beast;)
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Old August 11, 2010, 11:47 PM
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Quote:
Originally Posted by 3oh6 View Post
with an 875K (unlocked CPU multi) you really have limitless options for memory. you won't need super high clockable memory, and to be honest, it really plays little role...even in benchmarks. the only time high memory clocks really show up is in Super Pi...and even then, QPI clocks of the CPU are more important, because without QPI clocks, memory bandwidth is useless on Clarkbar setups.

i am not familiar with that particular MB, so i can't comment on how well it runs certain memory ratios or its available QPI multipliers, but assuming everything runs like it should, the DDR3-1600 sticks being shown should be plenty. i haven't been on top of memory lately but this kit looks to be pretty flexible as well...

G.SKILL F3-16000CL9D-4GBRH Ripjaws PC3-16000 4GB 2X2GB DDR3-2000 CL9-9-9-27 = $140
NCIX.com - Buy G.SKILL F3-16000CL9D-4GBRH Ripjaws PC3-16000 4GB 2X2GB DDR3-2000 CL9-9-9-27 Core i5 Memory Kit - F3-16000CL9D-4GBRH In Canada.

it will do DDR3-2000 no problem and should run DDR3-1800 at 8-8-8, DDR3-1600 at 7-7-7 as well based on what i can see from the net. might be worth it to spend $20 more for a kit that can cover all speed ranges at acceptable timings to give you more flexibility with BCLK to max out QPI.

HTH
Flexibility is what I'm looking for. I was looking at some of the Pi series and a different set of ripjaws but I overlooked this kit. I pricematched with newegg so this is probably the ram I'll go with. Thanks for your help and everyone's suggestions.
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