2014 My PC Build RAM problem

[kmleong]

Please Help Me with My New PC Build for 2014

CPU: Intel Core i7-4790K 4.0GHz Quad Core (Seems like a good choice for price/performance ratio) Do comment
Motherboard: MSI Z97-GAMING 7 ATX (Fixed! Means I Brought Already)
CPU cooler: Cooler Master Nepton 140XL (Fixed! Means I Brought Already)
Graphic Card : MSI GeForce GTX 970 4GB Twin Frozr V (Tons of Good reviews and pricey but if it's that good have to buy) Do comment
Power supply : Cooler Master V750 (Seems adequate) Do comment
Casing: Cooler Master HAF 912 Advanced http://www.coolermaster.com/case/mid-tower/haf-912-advanced/ (Fixed! Means I Brought Already) Only to find out I can't mount the water cooler on the rear But only at the top of the casing due 140mm fan
Hard Disk: 1 No. 120GB Kingston HyperX 3K, 1 No. 2TB WD Black, 1 No. 500GB WD Blue, 1 No. 1TB WD Blue, 1 No. 3GB WD Green and 1 No. 2TB WD Green. (All Are Existing HDD)
Memory: Kingston Beast 16GB (2x8GB) 1600 or 2400 (Do Comment)
Optical Drive: Do Recommend...

http://pcpartpicker.com/p/DDKgCJ

Currently These are what I am Thinking to buy except for the optical drive which I think I go for Bluray But have no idea which one is good but that not THE priority.

My Question is,,,
1. The Memory Module. Should I Go For The 2400 or the 1600 (Which I felt safer). I try to find the answer from some forums which for me is quite contradictory Some say it will work with the i7 4790k some say it i7 4790k can only support 1.5v and not 1.65v. Some say if the mobo support then it O.K and some say it all depend on the profiles and not the stated hardwares. It giving me headache so do help me Please.....

2. Power Supply. Is Cooler Master V750 Adequate? Hard disk for me always drag the system down... This advice I really can give to ALL Never Ignore your PSU. Without adequate Power your system will be slow and unresponsive. With A Good Power supply everything will run smoothly. But do I really need to go for the V1000?

3. Graphic Card: Is it worth it? I do play games and like to encode certain Video from my old DVD collections.

[Optional]
a. Is there a way to mount the water cooler on the rear of HAF 912 advanced casing. Have anyone try it before?

b. Which Brand Of Bluray Optical drive is more lasting?

I Do hope forummers will be able to help me on the RAM issue cos I am afraid if I brought the wrong RAM it be a total waste of money. The BSOD or instabilities problem. As for me GTX 970 is really very pricey but as I said if i have to buy it then go for it cos it can't be wrong except for the price,

Thanks In advance

 

[kmleong]

hmmm.. seem like nobody can help so here goes
google about the RAM speed problem last night and found out that said it will be stable at 1600Mhz RAM
Maybe the highest it can go is with Corsair Vengeance Pro CMY16GX3M2A1866C9 16GB 1866MHz

Using G.Skill ram seem to give a lot of troubles with MSI Motherboard (No! I am not saying the G.skill RAM is no Good. With other maybe they are excellent combination but with MSI Gaming 7 I prefer Not to take the risks.)

Here are what I learn last night

Q. What I think you're saying is that "No" I cannot set the speed of G-Skill RipJawsX F3-1866C9D-16GXM to 1866MHz. I'm better off getting RAM that is proven to be 100% compatible. Is this correct?

A. With tweaking, they may run at 1866. It really depends on the CPU IMC, the quality of the chips, and the SPD programming. My interpretation of what RemusM is saying is that Corsair is probably the better choice. Corsair has some models rated 2133 that will run on 1.50v's. Those would have an excellent chance to run at 1866 as long as the CPU IMC cooperates.

Max Memory Size (dependent on memory type) : 32 GB
Memory Types : DDR3-1333/1600
Memory Channels : 2
Max Memory Bandwidth : 25.6 GB/s

32GB DDR3-2400 is a "no-go" for 90% of the current CPUs.
Not enough memory bandwidth.
Even if you overvolt the CPU IMC, you won't get a rock stable system with 32GB DDR3-2400.
2 x 4GB DDR3-2400 yes.
4 x 8GB DDR3-2400 no way!
On the top of that, the best "spot" for Ivy/Haswell CPUs is 1866MHz for memory.

But its weird, i've seen reviews of these memories with i7 quite lower than the 4790K with OC at 2666 and stable with nice performances ...
You should ignore most of those "reviews".
At least for these reasons:
- 2 x 4GB kits in many of those setups.
- cherry picked CPUs
- paid reviews (advertising)
- with brand new components you might get "some" stability, but after a while ...

Most processors support and work "perfectly" with any amount of RAM (2-64gb) but only at those speeds that Intel's website inform about.
Anyways, you won't get much advantage between 1600 and 2400 (at least not in gaming).
XMP can't be disabled, as this RAM supports this. Therefore Intel's CPUs doesn't support that much, so it doesn't care whether it's 1333 or 2400. It will be possible to enable as it's just the feature of the RAM, not mobo or CPU. It's just mobo that supports XMP IF RAM features it.

If this processor doesn't support 32GB at 2400GHz why does Intel XMP work with it ? Shouldn´t the Intel profile be disabled ?
Why doesnt such an advanced Mobo disable or warn about the facts you mentioned related to these memories ?
If the 4790K doesnt support 32GB at 2400MHz, then what processor does in this mobo ?

It has nothing to do with the motherboard.
It's all about CPU IMC (the DDR3 controller is embedded into the CPU).
Check out the data sheets of all the Intel Haswell processors.
Intel does not guarantee anything above DDR3-1600 (or DDR3-1866 for a few models).
So if you want to overclock, you are on your own.
And finally, statistically (synthetic benchmarks, apps and games) speaking:
from DDR3-1333 to 1600: 4-5% boost
from DDR3-1600 to 1866: 2-3% boost
from DDR3-1866 to 2133: 1-2% boost
from DDR3-2133 to 2400: less than 1% boost plus all kind of stability issues.
The bottom line: 32GB DDR3-2400 is a waste of money for nothing but troubles.

OK
Thank you for your excellent explanation. Can you send me the bios manual settings for 1600 and 1866 ?

A 32GB kit rated at 2400MHz is based on high-quality (2133MHz) chips, that's for sure.
So the following timings should work fine:

DDR3-1600: 9-9-9-24 at 1.55V and 2T
DDR3-1866: 10-10-10-27 at 1.60V and 2T
In case of minor stability issues, you can raise the voltage a little bit (+0.05V or so).
You can also try 2133MHz (10-10-10-27 at 1.65V or 11-11-11-30 at 1.60V)

But the fact that GSkill is the only RAM manufacturer around that doesn't always work properly with MSI boards is just.. weird.

Not weird at all. It's because on some of them the SPD programming is, shall we say unusual? They can do what they want I suppose even though JEDEC may not be pleased about it. The mainboard manufacturers like MSI just have to employ their BIOS engineers to develop and come up with BIOS revisions to support them. There is a long story in all this as told to me by my uncle, but will spare the public at large.

For the full stories about Using GSKILL ram and having ANY issues? Read Here first
https://forum-en.msi.com/index.php?topic=178019.0