Patriot PVS32G1866LLK Viper Series PC3-15000 2GB Page: 1
Just over 3 weeks ago we were given the opportunity to taste the delights of Patriot's latest DDR3 kit. Rated at PC3-15000 speeds, the kit sounded like a performance junkie's dream come true. However, during the review we run into some issues with the kit that prevented us from even running at stock settings with any level of stability. Despite OC3D and Patriot's best efforts to find a resolution to this problem, it was eventually deemed that the kit may have been faulty.
Of course, even the tightest of quality control cannot prevent the occasional product slipping thought the net. So when Patriot asked if we'd be willing to give them another chance to prove that their top-of-the-range kit could still deliver the goods, we was more than willing to oblige.
So why start an entirely new review for the PC3-15000 kit? Well since the release of the original PDC32G1866LLK Patriot have made several cosmetic changes to the modules - including furnishing them with some very sexy finned heatspreaders and making a slight change to their part number (now PVS32G1866LLK). Of course, you'll have to excuse me if any parts of this review mirror that of the PDC32G1866LLK, but you can rest assured that the modules will be thoroughly re-tested and the newer results posted over the next few pages.
About Patriot...

Founded in 1985, a member of JEDEC, PDP Systems has been a value-added global technology solutions provider. PDP manufacturers and distributes DDR2, DDR, SDRAM and Flash memories. PDP's services include worldwide OEM contract manufacturing and private label.

PDP's state-of-the-art Fremont, California, facility is composed of multiple production lines, and a highly skilled production staff. This gives PDP the ability and resources necessary to provide a full line of memory module solutions.

Considered by many as one of the top memory manufacturers in the market, Patriot certainly have a lot of fierce competition on their hands. By taking a quick browse of the specifications available on their website, we should be able to find out what attributes (if any) separate Patriot from the rest of the crowd.
Patriot Extreme Performance (EP) Low Latency line is engineered to expand your gaming options. These modules are designed to operate at 1866MHz at 8-8-8-24 timings and is available in 2GB kit capacity. Equipped with Patriot ACC (Aluminum Copper Composite) technology, these modules are designed for maximum performance and stability under extreme overclocking conditions. Engineered with quality and Performance in mind, Patriot Extreme Performance line is the ultimate solution for extreme overclockers, gamers, and PC enthusiasts.

• Extreme Performance PC3-15000 (1866MHz)
• Low Latency (8-8-8-24)
• Equipped Patriot Viper Heat Shields with integrated ACC (Aluminum Copper Composite) technology
• 100% Tested and Verified
• Lifetime Warranty
• RoHS Compliant
• XMP Ready
• Tested and compatible with Intel P35 and X38 chipsets
Patriot PVS32G1866LLK PC3-15000 IC's Patriot PVS32G1866LLK PC3-1500 Specs Sticker
As you'd expect from a top memory manufacturer, Patriot have furnished the PVS32G1866LLK kit with a lifetime warranty. Unfortunately Patriot have not specified if this warranty covers the modules past their stock voltage of 1.9v, and as a result this may deter overclockers who want to put extra voltage through the modules to achieve a higher overclock.
In our previous review of the PDC32G1866LLK kit, we were unable to remove the heatspreaders in order to find out what memory IC's had been used on the kit. However, this time around (aided by a little heat) we were able to prize the heatspreaders off to reveal some overclocker friendly Micron D9GTR IC's. Previous reviews at Overclock3D have seen modules using these IC's hit close to DDR3-2000, so with any luck we should see some similar results from the Patriot kit.

Patriot PVS32G1866LLK Viper Series PC3-15000 2GB Page: 2
Back in our review of the PDC32G1866LLK kit I had a little moan about how unintuitive and boring the packaging was for such an expensive product. However, it looks like Patriot may have been listening, and as a result the Viper Series come in a very attractive white cardboard box complete with a window. This is a welcome change to the boring and over-used plastic blister pack packaging used on almost all other memory and certainly adds a level of 'class' to the modules.
Patriot PVS32G1866LLK Viper Series Box Front Patriot PVS32G1866LLK Viper Series Box Back
Around the back of the box, Patriot have printed a few paragraphs on the engineering methods and ethics that have gone into making the modules. Also included are details of the lifetime warranty and available methods of contacting Patriot to receive support.
Patriot PVS32G1866LLK Viper Series Box Patirot PVS32G1866LLK Viper Series Packaging
To ensure that the modules arrive in tip-top condition; Patriot have placed the modules inside their own individual plastic blister packs. This combined with the cardboard outer packaging should provide more than enough protection against rough couriers.
With many manufacturers moving to "fin" design heatspreaders in order to take maximum advantage of the airflow inside the average PC case, it's certainly no surprise to see Patriot following suit. The Viper Series has an entirely re-worked heatpreader design that features a total of 25 fins at the top of each module, which will undoubtedly yield improvements over Patriots older "ribbed" design.
Patriot PVS32G1866LLK Viper Series Front Patriot PVS32G1866LLK Viper Series Back
Patriot PVS32G1866LLK Viper Series Crossed Patriot PVS32G1866LLK Viper Series Close
It has to be said that the Viper heatspreaders don't feel quite as substantial as "finned" modules from other manufacturers such as OCZ (FlexXLC) and Corsair (Dominators). However, in their defence they keep the weight of the modules to a minimum resulting in less stress to the motherboard memory slots. It is also worth noting that the heatspreaders are manufactured from a combination of aluminium and copper for improved thermal performance.
Patriot PVS32G1866LLK Viper Series Top Patriot PVS32G1866LLK Viper Series Bottom
Patriot OVS32G1866LLK Viper Series Side Patriot PVS32G1966LLK Viper Series Nekkid!
From the various birds-eye views of the kit above, we can see that the IC's are placed on only one side of the modules. This is pretty standard for a 2GB DDR3 kit, and should mean that with only one bank of IC's and a fairly low operation voltage of 1.9v, the PVS32G1866LLK kit will run pretty cool.

Patriot PVS32G1866LLK Viper Series PC3-15000 2GB Page: 3
Test Setup
With DDR3 speeds ramping up on an almost weekly basis, It's extremely difficult to obtain two or more memory kits with similar specifications to perform any kind of worthwhile comparison. Therefore, the Patriot PC3-15000 kit will be placed up against the recently reviewed OCZ Platinum PC3-12800 kit with it's stock frequency, latencies and voltage changed to match the Patriot kit.
Patriot PVS32G1866LLK PC3-15000
OCZ Platinum PC3-12800
ProcessorIntel Core 2 Quad Q6600 "G0" 2.4GHz 2x4MB
Motherboard Asus P5K3 Deluxe
Graphics Card  Sapphire Ultimate X1950 Pro 256mb PCI-E
Hard Disk Hitachi Deskstar 80GB 7K80 SATA2 7200RPM 8mb
CPU Cooling Stock Intel Aluminium Cooler
Operating System Microsoft Windows Vista Ultimate (Latest Updates)
Graphics Drivers ATI Catalyst 7.4.44981
Motherboard Drivers Intel INF 8.300.1013
To guarantee a broad range of results, the following benchmark utilities will be used:
Synthetic Memory Subsystem
• Sisoft Sandra XII 2008c
• Lavalys Everest 4.0

File Compression & Encoding
• 7-Zip File Compression
• River Past ViMark

3D / Rendering Benchmarks
• Cinebench 10
• 3DMark05
• 3DMark06

3D Games
• Quake 4
• Bioshock
• F.E.A.R
Test Settings & Overclocking
As with all memory reviews on Overclock3D the Viper PC3-15000 modules were subjected to a series of benchmark tests under several different configurations. The configurations used tested the memory's ability to run at high frequencies with stock timings, high frequencies with loosened timings and also ensured that that the modules could run with 100% stability at their advertised speed, latency and voltage settings.
Stock Frequency & Timings
DDR3-1866 / 8-8-8-24 / 1.90v 
Patriot PVS32G1866LLK CPU-Z Patriot PVS32G1866LLK CPU-Z
It is an unfortunate fact that many memory kits tested here at Overclock3D fall at the first hurdle by not being able to run with 100% stability at their advertised stock settings. A recent example of this was when we tested Patriot's PDC32G1866LLK kit and failed to perform any level of overclocking due to stability issues.
However, after several hours of intense gaming benchmarks coupled with SuperPI and Prime95 stability testing, I'm pleased to say that the Patriot Viper kit didn't falter once, managing to run at advertised speeds with 100% stability. This is extremely good news, and shows that our previous experience with Patriot's PDC1866LLK kit was more than likely an isolated incident.
Highest Frequency @ Stock Timings
DDR3-1964 / 8-8-8-24 / 1.95v
Patriot PVS32G1866LLK CPU-Z Patriot PVS32G1866LLK CPU-Z
With the Viper kit already running at an extremely nippy 1866mhz, I certainly wasn't expecting to see much in the way of overclocking from these modules. However, with a little bit of extra voltage and some additional tweaking, the kit managed to hit DDR3-1964 with relative ease. This is actually the highest speed we've obtained from any DDR3 kit tested on Overclock3D without changing the manufacturers stated timings.
For those interested in getting the maximum memory overclocks out of their Asus DDR3 boards, please try the following as these proved extremely beneficial on the Patriot kit:
- Moving ram to A2 / B2 memory slots
- Set Transaction Booster to "Relaxed Level 3"
Highest Frequency @ Relaxed Timings
DDR3-1972 / 8-9-9-24 / 2.0v
Patriot PVS32G1866LLK CPU-Z Patriot PVS32G1866LLK CPU-Z
Loosening the timings to 8-9-9-24 allowed the modules to be pushed even further with system stability only becoming a limiting factor at DDR3-1972 (just 28mhz short of 1ghz!!). I have no doubts in my mind that by increasing the voltage to 2.1/2.2v, we could have easily seen Viper kit hit DDR3-2000 (1000mhz) and possibly even beyond!

Patriot PVS32G1866LLK Viper Series PC3-15000 2GB Page: 4
Sisoft Sandra

Sisoft Sandra is a synthetic benchmark utility capable of reporting and benchmarking a wide range of system components. For the OCZ Platinum PC3-12800 and Patriot PC3-15000 memory kits we run both the Memory Bandwidth and Memory Latency benchmarks 3 times to ensure accuracy of results.
Sisoft Sandra Memory

Sisoft Sandra memory

Sisoft Sandra Memory


Everest is in many ways similar to Sisoft Sandra. Focusing mainly on Software and Hardware information reporting, Everest also comes with a benchmark utility suitable for testing the read, write and latency performance of the memory subsystem.
Lavalys Everest Memory Read

Lavalys Everest Memory Write

Lavalys Everest Memory Latency

Patriot PVS32G1866LLK Viper Series PC3-15000 2GB Page: 5

ViMark is the latest addition to the OC3D testing process and a relatively new benchmarking application in general. Designed to take the inaccuracies and guesswork out of measuring the time taken to encode video files, ViMark produces easily comparable and consistent results for encoding Windows Media, Quicktime, AVI and Gif files.
ViMark - Windows Media

ViMark - Apple Quicktime

ViMark - AVI

ViMark - GIF


7-Zip is an open source winzip-style file compression utility that has the ability to compress and decompress many file formats including it's own .7z compression scheme. 7-Zip also comes complete with its own benchmarking utility for gauging the compression and decompression speed of the system that it is installed on.
7-Zip - Compression

7-Zip - Decompression

Patriot PVS32G1866LLK Viper Series PC3-15000 2GB Page: 6

Cinebench 10 is a benchmarking tool based on the powerful 3D software Cinema 4D. Consequently, the results of tests conducted using Cinebench carry significant weight when analysing a computer’s performance in everyday use.
Cinebench Rendering

Cinebench Rendering

Cinebench OpenGL


3DMark is a popular synthetic gaming benchmark used by many gamers and overclockers to gauge the performance of their PC's. All 3DMark runs were performed 3 times with averages being calculated from each of the results.


Patriot PVS32G1866LLK Viper Series PC3-15000 2GB Page: 7

Quake 4 is a game built on the Doom 3 engine. Benchmarking was performed using Quake4Bench and a custom timedemo recording along with 0xAA, 0xAF settings at a resolution of 1024x768.
Quake 4


F.E.A.R. is a game based on the Lithtech Jupiter EX engine. It has volumetric lighting, soft shadows, parallax mapping and particle effects. Included in the game is a benchmark facility that taxes the entire PC system. This benchmark was run 3 times to ensure uniformity of results.


Bioshock is a recent FPS shooter by 2K games. Based on the UT3 engine it has a large amount of advanced DirectX techniques including excellent water rendering and superb lighting and smoke techniques. All results were recorded using F.R.A.P.S with several identical runs through the same area of the game.

Patriot PVS32G1866LLK Viper Series PC3-15000 2GB Page: 8
Falling just 28mhz shy of DDR3-2000 on slightly relaxed 8-9-9-24 timings, the Patriot PVS32G1866LLK "Viper" kit is certain to fulfil any bandwidth hungry overclockers "need for speed" ; and has actually earned it's place as the fastest DDR3 kit we've tested on Overclock3D to date. More importantly, the kit managed to run at stock PC3-15000 / 8-8-8-20 settings with 100% stability on three of our test configurations and with no additional "tweaking" aka "faffing around" required.
We also need to remember that all overclocking results obtained from the modules were achieved with a measly 1.95v. Adding some extra voltage and/or active cooling to the modules would have undoubtedly seen the PVS32G1866LLK kit overclock much higher. However, as Patriot do not provide any kind of "extended voltage warranty" on the Viper kit, overclockers will have to experiment at their own risk.
Priced at around £270 on websites such as Aria, the Patriot PVS32G1866LLK comes in at an extremely competitive price point for a DDR3 kit of this speed and even beats the price of some lower rated kits from other respectable manufacturers. Good work patriot!
The Good
• Manages to hit DDR3-1964 on stock timings with only 1.95v.
• Loosening timings to 8-9-9-9 allowed us to overclock to DDR3-1972.
• Sexy finned "Viper" heatspreaders.
• Lifetime Warranty.
• Very good price for a DDR3 kit.
• Unique packaging. Not your usual blister pack affair!
The Mediocre
• No "extended voltage warranty" to give overclockers extra piece of mind.
The Bad
• Diddly squat
Performance Award
Thanks to Patriot for making this review possible. Discuss in our forums.