Customer Reviews

OCZ OCZ2VU80016GQ 16 GB (4 x 4 GB) DDR2 800MHz Vista Dual Channel Quad Kit

5 star:		(5)
4 star:		(0)
3 star:		(0)
2 star:		(0)
1 star:		(0)

 

 

I deliberated for quite some time whether I wanted the absolute most memory my P45 chipset would support (16GB) - which would mean settling for the DDR2-800 speed rating - or install only 8GB of nominally faster (DDR2-1066, or DDR2-1200) DRAM. In the end, convinced that apart from synthetic benchmarks the real-world performance gain I was likely to see from -1066 or -1200 would be in the realm of 3-5%, I went with the most memory I could get my hands on. And this OCZ set had a distinct price advantage over everything else I looked at in that category. That gave me pause, because of the adage that you get what you pay for. But having read some other reviews I felt confident enough to proceed with the purchase & install and am very pleased with the results. I believe the stock SPD timings were 5-6-6-18, but I've successfully run this set at 5-5-5-15. Like another reviewer, I took it to 420MHz in terms of a successful OC, but only experimentally. Since then, I've backed it down to 400MHz because that's more than adequate for me and I'm not one to needlessly jeopardize my hardware for bragging rights.

When I refer to the RAM running successfully, I measure that by successful completion of 5 iterations of the IntelBurn utility (a wrapper around the Linpack library for solving systems of linear algebra equations; it's generally regarded as being significantly more stressful than Prime95, though I'm no mathematician). Under Win7 x64, I instructed IntelBurn to run at maximum RAM settings which caused it to consume 14.5-15GB or so. I got 50GFLOPS/sec. on my Core2 Quad Q9550 and the 5 iterations complete in about 1Hr. 40Min. or so with complete stability and surprisingly modest temperature increases from idle to full-load for the duration. It's commonly said that two hours or so on IntelBurn is like 24 hours or more in Prime95, and in any case I've also run MemTest86+ (v4.0 IIRC) for 24 hours with zero errors. My Win7 WEI score is 7.3 overall, with 7.4 on both the CPU and Memory sub-ratings, and 7.3's on both graphics scores (EVGA GTX 285 1GB GDDR3) as well as the Disk score (incidentally, also an OCZ product: the Agility 60GB SSD).

All that being said, it's awfully hard to use up this much memory under a single OS, even beating of it with apps like Photoshop CS4 and some very large multi-layer images. But I use the 16GB pool to run multiple guest OS's under VMware Server or VMware Fusion 3.0 (yes, read into that what you will). I have yet to try to install the ESXi hypervisor onto this hardware (I don't have any spare drives right now for a VMFS filesystem), but doing so as a "whitebox" experiment is on my list and based on some past success stories I expect this to be no problem. In that specific use case the 16GB will really shine. Being able to easily run around 8 or even 10 virtual servers on this platform gives you huge ROI for a lab environment, etc. All in all, I'm very happy with this RAM so far, and with OCZ in general (That Agility SSD is terrific as well, though a topic for another review).

installed in ASUS P5Q-E motherboard running x64 version of Windows Server 2008. No problems or BIOS tweaks needed, plug it in and it works!

I had my reservations about using all 4 memory banks on my Asus P5Q-EM. But after installing these I had ZERO issues. In fact in all the years of building various machines, I was 100% ready for some system beeps (memory issues). Now some believe 16gb is overkill, and well, it kind of is. If you are like me and do a lot of virtualization (IE a VMWare build machine, development machine, various testing OS's etc.) Then you will not go wrong with buying these modules.

For the overclockers, on my board i was not able to get past 841mhz, this was 1:1 with my q9650 at 420fsb. This is respectable and w/o any voltage increases.

All in all rated them 5 stars.

I have bought this ram have heard People could only get this memory to operate only at 667 mhz . This is not the case in my new build it runs sucessfully up to 934 MHZ in a Gigabyte GA-EG45M-UD2H motherboard. My FSB is 1510 at 904MHZ. I have run this at stock voltage. It runs really well . I recommend this memory it is a a great price too for 16 GB of DDR2 PC2 6400 800 mhz. My gigabyte will run it overclocked sucessfully over 900 mhz. Some people must have a problem with thier BIOS not accepting the RAM or the memory is bad itsself. Kingstion or Crucial eat your heart out your prices are too high. Thanks OZC you helped me create a Intel core 2 Quad 9550 build at a price that others just wanted for memory. This system is run with a new Radeon 5770 HD 1 GB GDDR5 video card my windows & Home Premuim 64 Bit scors as follows Processor 7.4 Memory 7.4 Graphics 7.5 Gaming 7.5 Hard disks 5.9 Drives are Hitachi 2 1TB 32 mb cache in Raid 0.

Check OZC 16 GB Vista DDR2 PC-6400 ram out great overclocking and great value.

Capible of installing 16GB on Windows Vista, so not knowing future needs, bought these to be prepared incase had the need. Price was right. So far have used less than 5GB with multiple applications running, have to consider pipeline of the other components. Would do over again if need arises. Pricing was appropriate.