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G.SKILL Ripjaws Z & i5 Haswell Compatibility

post #1 of 4
Thread Starter 
I was completing my build on pcpartpicker.com and I stumbled on a message on the bottom that stated my RAM selection was not compatible with my CPU.
I'm about half-way done with my build, I still have yet to purchase the CPU, RAM, and CPU cooler. But I have selected what I am going to purchase, and this is the only problem I have stumbled across.

This is what pcpartpicker.com had told me:

"G.Skill Ripjaws Z Series 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."


Here are the specs of my build:

NZXT Phantom 410 ATX Case
Corsair CX 600W PSU
Gigabyte Z87X-D3H Motherboard
Intel i5 4670K Haswell 3.4Ghz CPU
G.SKILL Ripjaws Z 8GB (2x4gb) 2400mhz RAM
Gigabyte GTX 770 Windforce OC 2GB GPU
Corsair Hydro H60 Water Cooler
Seagate Barracuda 1TB 7200RPM HDD
ASUS 24X/48X Optical Drive
Windows 7 Home Premium


Any clue what this means? I had no clue my RAM exceeds the voltage recommended by Haswell; does this mean I should swap out my RAM for a different one?
post #2 of 4
I would swap out the RAM for something else that is 1.5v or lower instead of 1.65v. Since Sandy Bridge came out memory at 1.65v may have trouble because technically it's considered "Overclocked" memory. JEDEC spec calls for 1.5v standard for DDR3 memory and the max voltage for DDR3 to be considered stable is 1.575v. So 1.65v is risky unless you're willing to take the risk, IMO 2400 memory is not really worth it. In real world performance you could expect maybe 10-15% gain over 1600 speed memory.

Basically due to JEDEC spec and Intel design constraints Haswell is only guaranteed to run without any problems on 1.5v memory at 1600 speeds. Anything beyond that is considered overclocked as you will notice on all 1150 motherboards on NewEgg any listings of frequencies beyond 1600 speeds are listed as "(OC)" because it would fall out of specifications.

I'm not saying that 2400 speeds won't work, it's just that it will not be guaranteed to work stable at anything past 1600 speeds by the manufacturer. But as long as you have a high-end motherboard it should work without problems. Just know that you're taking a risk and if that risk is worth the gain. I had my fair share of 1.65v memory crashing my system and figuring out later that it exceeds the JEDEC specs to only replace it with 1.35v memory costing me more in the end. And these were 1.65v 1600 memory sticks crashing on Sandy Bridge and not some speedy 1.65v memory clocked at 2200+ speeds.

It's really your choice now on what you want to do after I provided the info for you.
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CPUMotherboardGraphicsRAM
Intel i7 6700K Batch #L535B021 4.7Ghz @ 1.296V GIGABYTE G1 Gaming GA-Z170X-Gaming 7 EVGA Geforce GTX 970 SSC ACX 2.0+ G.SKILL TridentZ 16GB DDR4 3000 
Hard DriveHard DriveHard DriveCooling
Samsung 950 Pro M.2 512GB  Crucial BX100 250 GB SanDisk SSDPlus 240 GB NZXT Kraken X61  
OSMonitorKeyboardPower
Windows 8.1 & 10 Dell UltraSharp 2913WM 21:9 2560x1080 Ducky Shine 4, CODE WASD, Deck Legend, G710+ EVGA SuperNova G2 850W 
CaseMouseMouse PadAudio
Phanteks Enthoo Evolv ATX Mid-Tower Ducky Secret SteelSeries Fostex Purple Heart TH-X00 
Audio
AKG K553 Pro, Philips SHP9500, Superlux 668B, S... 
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Skylake Is Here!
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 6700K Batch #L535B021 4.7Ghz @ 1.296V GIGABYTE G1 Gaming GA-Z170X-Gaming 7 EVGA Geforce GTX 970 SSC ACX 2.0+ G.SKILL TridentZ 16GB DDR4 3000 
Hard DriveHard DriveHard DriveCooling
Samsung 950 Pro M.2 512GB  Crucial BX100 250 GB SanDisk SSDPlus 240 GB NZXT Kraken X61  
OSMonitorKeyboardPower
Windows 8.1 & 10 Dell UltraSharp 2913WM 21:9 2560x1080 Ducky Shine 4, CODE WASD, Deck Legend, G710+ EVGA SuperNova G2 850W 
CaseMouseMouse PadAudio
Phanteks Enthoo Evolv ATX Mid-Tower Ducky Secret SteelSeries Fostex Purple Heart TH-X00 
Audio
AKG K553 Pro, Philips SHP9500, Superlux 668B, S... 
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post #3 of 4
Thread Starter 
Quote:
Originally Posted by anoob View Post

I would swap out the RAM for something else that is 1.5v or lower instead of 1.65v. Since Sandy Bridge came out memory at 1.65v may have trouble because technically it's considered "Overclocked" memory. JEDEC spec calls for 1.5v standard for DDR3 memory and the max voltage for DDR3 to be considered stable is 1.575v. So 1.65v is risky unless you're willing to take the risk, IMO 2400 memory is not really worth it. In real world performance you could expect maybe 10-15% gain over 1600 speed memory.

Basically due to JEDEC spec and Intel design constraints Haswell is only guaranteed to run without any problems on 1.5v memory at 1600 speeds. Anything beyond that is considered overclocked as you will notice on all 1150 motherboards on NewEgg any listings of frequencies beyond 1600 speeds are listed as "(OC)" because it would fall out of specifications.

I'm not saying that 2400 speeds won't work, it's just that it will not be guaranteed to work stable at anything past 1600 speeds by the manufacturer. But as long as you have a high-end motherboard it should work without problems. Just know that you're taking a risk and if that risk is worth the gain. I had my fair share of 1.65v memory crashing my system and figuring out later that it exceeds the JEDEC specs to only replace it with 1.35v memory costing me more in the end. And these were 1.65v 1600 memory sticks crashing on Sandy Bridge and not some speedy 1.65v memory clocked at 2200+ speeds.

It's really your choice now on what you want to do after I provided the info for you.

So anything above 1600Mhz is considered overclocked? If so, then ill just go on with 1600Mhz rather than 2400mhz. Any RAM recommendations? Ripjaws X? Ripjaws Z? Or any other brand of RAM? I'm looking for fast RAM for gaming that is 8GB. I'll be adding an extra 8GB in the near future so I can go forward with 16GB; but for now, I need solid 8GB RAM for gaming.
post #4 of 4
The most popular still seems to be G. Skill series RipJaws but there's also the G. SKill Sniper series. There's the Corsair Vengeance/Dominator series but IMO the Dominators are overpriced. You'd get better value around $70-80 for 8GB 1600 sticks than paying extra for a name. 1600 memory is still pretty standard but it's your choice to choose what you want. There's Kingston HyperX series that has been around for a while just make sure you get 1.5v if you go for that kit as there's still some 1.65v kits in stock. Crucial also has the Ballistix series and Mushkin has their Redline and Blackline memory just watch out for their 1.65v memory if they have any left. STT (Super Talent) used to make some pretty fast memory sticks for DDR2 but they've fallen off of the memory wagon and seemed to discontinue making any memory sticks.

There's only 3 big name memory IC's left, Hynix, Micron, and Samsung. Some people will try to get the Samsung IC's because they're generally faster. But Crucial Micron is the only company that actually makes their own IC's. Most of these companies just source their IC's from the big three i.e. Corsair, Kingston, Patriot, Team, ADATA, G. SKill, Mushkin etc... The gap in memory performance has been closing ever since DDR2 so timings/speeds don't gain you that much more significant of a performance in the real world. You'd have to slightly double 1600 speeds to 2400 to get a 10-15% performance increase, tighter timing doesn't help as much like it use to. So the choice is really yours, some people want better heatsinks and some may want flashy LED lights for cosmetic purposes.
Skylake Is Here!
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 6700K Batch #L535B021 4.7Ghz @ 1.296V GIGABYTE G1 Gaming GA-Z170X-Gaming 7 EVGA Geforce GTX 970 SSC ACX 2.0+ G.SKILL TridentZ 16GB DDR4 3000 
Hard DriveHard DriveHard DriveCooling
Samsung 950 Pro M.2 512GB  Crucial BX100 250 GB SanDisk SSDPlus 240 GB NZXT Kraken X61  
OSMonitorKeyboardPower
Windows 8.1 & 10 Dell UltraSharp 2913WM 21:9 2560x1080 Ducky Shine 4, CODE WASD, Deck Legend, G710+ EVGA SuperNova G2 850W 
CaseMouseMouse PadAudio
Phanteks Enthoo Evolv ATX Mid-Tower Ducky Secret SteelSeries Fostex Purple Heart TH-X00 
Audio
AKG K553 Pro, Philips SHP9500, Superlux 668B, S... 
  hide details  
Reply
Skylake Is Here!
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 6700K Batch #L535B021 4.7Ghz @ 1.296V GIGABYTE G1 Gaming GA-Z170X-Gaming 7 EVGA Geforce GTX 970 SSC ACX 2.0+ G.SKILL TridentZ 16GB DDR4 3000 
Hard DriveHard DriveHard DriveCooling
Samsung 950 Pro M.2 512GB  Crucial BX100 250 GB SanDisk SSDPlus 240 GB NZXT Kraken X61  
OSMonitorKeyboardPower
Windows 8.1 & 10 Dell UltraSharp 2913WM 21:9 2560x1080 Ducky Shine 4, CODE WASD, Deck Legend, G710+ EVGA SuperNova G2 850W 
CaseMouseMouse PadAudio
Phanteks Enthoo Evolv ATX Mid-Tower Ducky Secret SteelSeries Fostex Purple Heart TH-X00 
Audio
AKG K553 Pro, Philips SHP9500, Superlux 668B, S... 
  hide details  
Reply
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