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Will adding RAM of different brand/CAS latency cause instability?

post #1 of 5
Thread Starter 
Greetings all.
I want to know, will adding a ram stick of a different brand and CAS latency (6) to a board that already has three sticks of RAM that are the same brand and CAS latency (5)?

They'll be the same size (2GB per stick) and is DDR 2 800MHz

Thanks in advance.
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Apollo
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Juan
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post #2 of 5
Most likely yes as it will stress the memory controller much more to run ram out of spec. running at the lower rams settings would be your best bet.
post #3 of 5
Some mobo BIOS will automatically lower the RAM frequency to the lowest setting and increase latencies - all in an effort to run mis-matched RAM. This is why it's never recommended to mix RAM.

As far as system stability is concerned the only way to tell is to stress test with prime 95, OCCT, Linpack or similar. I'd first run Memtest86+ to see if the RAM even will run without errors with the mix.
post #4 of 5
same density, same speed, just different CAS.. it may not be too much of an issue but if you do get instability you could match your timings and latency in the BIOS perhaps but as abouv posted said it will place stress on your IMC but not much in this case smile.gif
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Going to be chaep
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Wife's Rig
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1.67Ghz Atom stock 1GB DDR2 2 x 500GB Western Digital Cavier Blacks [RAID 1] 
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stock DSM3.2 [built on linux] stock stock 
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post #5 of 5
Thread Starter 
Alright...I'll give it a try and see what happens. Cheers. Rep'd all. smile.gif
Apollo
(16 items)
 
Project Greyscale
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Juan
(16 items)
 
CPUMotherboardGraphicsRAM
Intel Core i7-5930K Asus Sabertooth X99 ASUS GeForce GTX 1080 8GB ROG STRIX  Corsair Vengeance 32GB (4x8GB) DDR4 3000 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 500GB Samsung 850 EVO 1TB Samsung SH-224BB CM Hyper 212 EVO 
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Windows 8.1 x64 Pro Asus PB278Q (1440p) Gigabyte Aivia Osmium (Cherry Red) Corsair AX850 
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Cooler Master HAF X Gigabyte Aivia Krypton Razer Goliathus Extended Speed Edition Realtek ALC1150 8-Channel + Logitech z906 + Sam... 
CPUMotherboardGraphicsGraphics
i7-4790K EVGA Z97 Classified EVGA GTX 780Ti EVGA GTX 780Ti 
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Dominator Platinum Spinpoint F3 Spinpoint F3 510 Series 
Hard DriveHard DriveCoolingCooling
510 Series 320 Series XSPC AX120 XSPC AX360 
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XSPC AX240 EK Supremacy EK FC780 GTX Ti WIndows 8.1 
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OS X 10.9.3 Yamaski Catleap 120Hz HCP-1200 Air 540 
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Razer Deathadder Table Avid Fast Track Duo HiFIMan HE-400 
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AMD FX-8120 @4.5GHz GIGABYTE GA-990FXA-UD7 GIGABYTE Radeon HD 7950 CrossFired G.SKILL Sniper 1600MHz 2x4GB 
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OSMonitorKeyboardPower
Windows 8.1 x64 Pro Asus PB278Q (1440p) Gigabyte Aivia Osmium Corsair AX850 
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Apollo
(16 items)
 
Project Greyscale
(24 items)
 
Juan
(16 items)
 
CPUMotherboardGraphicsRAM
Intel Core i7-5930K Asus Sabertooth X99 ASUS GeForce GTX 1080 8GB ROG STRIX  Corsair Vengeance 32GB (4x8GB) DDR4 3000 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 500GB Samsung 850 EVO 1TB Samsung SH-224BB CM Hyper 212 EVO 
OSMonitorKeyboardPower
Windows 8.1 x64 Pro Asus PB278Q (1440p) Gigabyte Aivia Osmium (Cherry Red) Corsair AX850 
CaseMouseMouse PadAudio
Cooler Master HAF X Gigabyte Aivia Krypton Razer Goliathus Extended Speed Edition Realtek ALC1150 8-Channel + Logitech z906 + Sam... 
CPUMotherboardGraphicsGraphics
i7-4790K EVGA Z97 Classified EVGA GTX 780Ti EVGA GTX 780Ti 
RAMHard DriveHard DriveHard Drive
Dominator Platinum Spinpoint F3 Spinpoint F3 510 Series 
Hard DriveHard DriveCoolingCooling
510 Series 320 Series XSPC AX120 XSPC AX360 
CoolingCoolingCoolingOS
XSPC AX240 EK Supremacy EK FC780 GTX Ti WIndows 8.1 
OSMonitorPowerCase
OS X 10.9.3 Yamaski Catleap 120Hz HCP-1200 Air 540 
MouseMouse PadAudioAudio
Razer Deathadder Table Avid Fast Track Duo HiFIMan HE-400 
CPUMotherboardGraphicsRAM
AMD FX-8120 @4.5GHz GIGABYTE GA-990FXA-UD7 GIGABYTE Radeon HD 7950 CrossFired G.SKILL Sniper 1600MHz 2x4GB 
Hard DriveHard DriveOptical DriveCooling
Crucial 64GB m4 1TB WD Black Samsung SH-224BB CM Hyper 212+ 
OSMonitorKeyboardPower
Windows 8.1 x64 Pro Asus PB278Q (1440p) Gigabyte Aivia Osmium Corsair AX850 
CaseMouseMouse PadAudio
CM 690II Gigabyte Aivia Krypton Razer Goliathus Extended Speed Edition Realtek ALC889 + Logitech z906 + Samson SR850 
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