Memory compatibility ddr2 pc8000 with pc8500

actionjksn · 08-19-2009, 07:35 AM

I have a evga 780i ftw, with 4 gigs of 0cz pc 8000 SLI ram. I want to go with a 64 bit Win 7 OS. So I want to install 4 more gigs of memory. I found 4 gigs of OCZ pc 8500 ram. Will these two pairs be compatible? Will I need to change some bios settings? here are the specs of both rams.

1000MHz DDR2
EPP 5-4-4-15*
(CAS-TRCD-TRP-TRAS)
Available in 2GB (2048MB) modules and 4GB (2x2048MB) D/C Kits
Unbuffered
SLI-Ready XTC Heatspreader**
Lifetime Warranty
2.1 Volts
240 Pin DIMM

# Cas Latency: 5
# Timing: 5-5-5-18
# Voltage: 2.2V
# Multi-channel Kit: Dual Channel Kit
# Heat Spreader: Yes
# Features: Platinum-Mirrored XTC Heatspreader 2.15V EVP
# Recommend Use: High Performance or Gaming Memory
# Parts: Lifetime limited
# Model #: OCZ2P10664GK
# Item #: N82E16820227298

**Tyree** · 08-19-2009, 08:32 AM

They "might" work together. Mixing RAM is a crap shoot.
The faster RAM will default to the slower RAM speed.
Filling all RAM slots on a Mobo can cause voltage issues.
4GB is more than you will use.

actionjksn · 08-19-2009, 08:43 AM

I was thinking I could adjust voltages on the one with lower voltage. I have a very tweekable bios, it's a pretty high end motherboard, and I have a 1000 watt Antec power supply. So it should have no trouble supplying enough juice. My cpu is an Q 9550 core 2 quad.

**Tyree** · 08-19-2009, 09:46 AM

That can be done but the other issues I posted are still relevant and
you will see no performance increase with 8GB of RAM.

08-19-2009, 07:35 AM	#1 (permalink)
actionjksn Registered User Join Date: Aug 2007 Posts: 2 OS: windows xp pro	Memory compatibility ddr2 pc8000 with pc8500 I have a evga 780i ftw, with 4 gigs of 0cz pc 8000 SLI ram. I want to go with a 64 bit Win 7 OS. So I want to install 4 more gigs of memory. I found 4 gigs of OCZ pc 8500 ram. Will these two pairs be compatible? Will I need to change some bios settings? here are the specs of both rams. 1000MHz DDR2 EPP 5-4-4-15* (CAS-TRCD-TRP-TRAS) Available in 2GB (2048MB) modules and 4GB (2x2048MB) D/C Kits Unbuffered SLI-Ready XTC Heatspreader** Lifetime Warranty 2.1 Volts 240 Pin DIMM # Cas Latency: 5 # Timing: 5-5-5-18 # Voltage: 2.2V # Multi-channel Kit: Dual Channel Kit # Heat Spreader: Yes # Features: Platinum-Mirrored XTC Heatspreader 2.15V EVP # Recommend Use: High Performance or Gaming Memory # Parts: Lifetime limited # Model #: OCZ2P10664GK # Item #: N82E16820227298 Last edited by actionjksn; 08-19-2009 at 07:38 AM.

08-19-2009, 08:32 AM	#2 (permalink)
Tyree Mentor Hardware Team Join Date: May 2009 Location: Illinois Posts: 5,444 OS: XP Pro-7RC-Mandriva My System	Re: Memory compatibility ddr2 pc8000 with pc8500 They "might" work together. Mixing RAM is a crap shoot. The faster RAM will default to the slower RAM speed. Filling all RAM slots on a Mobo can cause voltage issues. 4GB is more than you will use. __________________ Posting your PC specs will help us to help you quicker and more efficiently.

08-19-2009, 08:43 AM	#3 (permalink)
actionjksn Registered User Join Date: Aug 2007 Posts: 2 OS: windows xp pro	Re: Memory compatibility ddr2 pc8000 with pc8500 I was thinking I could adjust voltages on the one with lower voltage. I have a very tweekable bios, it's a pretty high end motherboard, and I have a 1000 watt Antec power supply. So it should have no trouble supplying enough juice. My cpu is an Q 9550 core 2 quad.

08-19-2009, 09:46 AM	#4 (permalink)
Tyree Mentor Hardware Team Join Date: May 2009 Location: Illinois Posts: 5,444 OS: XP Pro-7RC-Mandriva My System	Re: Memory compatibility ddr2 pc8000 with pc8500 That can be done but the other issues I posted are still relevant and you will see no performance increase with 8GB of RAM. __________________ Posting your PC specs will help us to help you quicker and more efficiently.