Ram and Haswell Question

Just finished setting up a build on PC Part Picker and now there is a compatibility note about the voltage between the 4770K and the Vengeance pro I have set up. 

"Corsair Vengeance Pro 8GB (2 x 4GB) DDR3-2400 Memory operating voltage of 1.65V exceeds the Intel Haswell CPU recommended maximum of 1.5V+5% (1.575V). This memory module may run at a reduced clock rate to meet the 1.5V voltage recommendation, or may require running at a voltage greater than the Intel recommended maximum."

My question is how much lower will my clock rate on the ram be?


I always chose to go with 1.5V RAM. Most RAM is 1.5V and that just seems to be the standard. It will prob run at 1333Mhz until you go into the BIOS and change the XMP profile to run it at 2400Mhz. Although I don't know for sure. 

The thing is though, it doesn't really matter. For the most part, especially if you are just gaming, the performance difference between 1333Mhz and 2400Mhz is negligible. Around .2 to .5 of an FPS difference. IE within the margin of error. Also as clock speed goes up so does latency which can negatively impact performance. 1600Mhz is usually the sweetspot in terms of latency to clock speed. 

That RAM you chose is rather expensive. Unless you really like the heat spreader I recommend you chose cheaper RAM. $150 RAM or $250 RAM. There really is no difference. Except you spent more. 

For ivy bridge 1.65 is out of spec, but is generally considered "safe" for everyday use. I don't see why this would change too much wih Haswell.

So long as it doesn't overheat I could care less what the sink looks like. And if the clock makes that small a difference, I'd rather save the cash and throw it at the gpu. One thing I've wondered is it better to have 4 or 2 dimms, I'm assuming 4.

First, you are much better going with 2x8gb ram than 4x4gb ram to get your timings down. Second, skip corsair, they are overpriced for what they are. Go with gskill, mushkin, or who ever else you can get a good deal on. Like jon666 said, 1.65 is still livable day to day for majority of ram. And exactly like DerKrieger said, you aren't going to see that much of an improvement in games with 2400mhz over 1600mhz. Definitely a good spot to save some dollars.


Question is how much overvolting can you really get away with on a Haswell

At the time Corsair was on sale on amazon, so thats what i put into my MBP. I don't have much experience with building rigs, so i dont have any die hard must have brands. Ive heard good thing about GSkill aegis and ripjaw.

Most of the gskill line are great value, sometimes the difference in product is simply the heatspreader they put on. The sniper series don't seem to have the same kind of specs though. Geil, mushkin, adata, kingston are also all good brands. Just look for the speed you want and then go with the one with the lower timings at the best price. And stick to a 2 dimm setup, less potential issues (make sure to install them in the same channel which should be just sticking them in the same colour slots).

Just a few I found in a quick search:

http://www.amazon.com/G-Skill-Profile-F3-1600C9D-16GAR-DDR3-1600-Desktop/dp/B008XW077S/ref=sr_1_18?s=pc&ie=UTF8&qid=1391915758&sr=1-18&keywords=ddr3+1600+16+gb http://www.amazon.com/Corsair-Dominator-Platinum-Desktop-CMD16GX3M2A1866C9/dp/B007Z1CVIQ/ref=sr_1_61?s=pc&ie=UTF8&qid=1391916280&sr=1-61&keywords=cl9 http://www.amazon.com/G-Skill-PC3-14900-1866MHz-TridentX-8-9-9-24/dp/B009V57KW6/ref=sr_1_79?s=pc&ie=UTF8&qid=1391916319&sr=1-79&keywords=cl9 http://www.amazon.com/G-Skill-PC3-17000-2133MHz-RipjawsX-9-11-11/dp/B007CZDS64/ref=sr_1_95?s=pc&ie=UTF8&qid=1391916319&sr=1-95&keywords=cl9