Page 2 - A Closer Look, Test System
The Patriot Viper LED PC4-24000 2x8GB, being a part of the latest performance DDR4 line from the company, utilizes a set of medium profile heatspreaders. It is designed to draw attention with its black and silver color scheme. I found it quite conservative looking compared to the Viper Elite series, but let us not forget the plastic diffuser piece at the top to for its red LEDs to shine through. The Viper LED's aluminum pieces are distinctively shaped and molded to give it a little more visual flare and complexity. Aluminum is lightweight and serves as a decent heat conductor, while the ventilated heatsink design is not for heat dissipation, but rather for the LEDs to shine through. The Viper LED is only about one centimeter taller than modules with no heatspreaders at all. This is useful for systems equipped with side mounted CPU heatsink fans adjacent to the memory slots, as it can piggy-back off the generated airflow. Since the heatspreader height is relatively moderate, it is still entirely possible for the Viper LED to fit under a well-designed cooler with sufficient clearance room. Whether you like to call it marketing gimmick or whatnot, it is impossible nowadays to find performance memory without any form of a heatspreader attached, haha. They do undeniably serve a purpose in dissipating heat, but for most memory modules, unless run at a voltage significantly over designed voltages -- which you will not, special thanks to integrated memory controllers on Intel processors -- this feature is certainly not a requirement. But I will admit they look pretty cool in any windowed chassis.
The heatspreader design of the Patriot Viper LED modules is asymmetrical when looked at straight on, but symmetrical between sides, which is logical, because memory can be installed in different directions depending on your motherboard manufacturer and design. Besides functional purposes, it also improves the look. The Viper logo in silver is embossed dead center with a cool CGI pattern on both sides. Interestingly, Patriot's logo is not permanently etched anywhere at all, kind of like how Kingston works with their HyperX brand. A specification label is found on the other side. It lists the model number (PVLR416G300C5K), bandwidth, CAS latency, voltage, and the kit's memory capacity. The Patriot Viper LED PC4-24000 2x8GB's manufacturing location is not listed.
As you can see more clearly in our photo above, the Patriot Viper LED PC4-24000 2x8GB has a very nice black PCB. The LEDs are placed on the main PCB itself, and there is no option to turn them off or set lighting effects, which can be a bummer for some. Meanwhile, its heatspreader on top is composed of two separate pieces. The heatspreaders are held to the module itself by a strip of thermally conductive adhesive, and are not physically locked together. The adhesive force between the two heatspreaders and memory ICs is pretty strong as always from the company, so if you ever do take them off, keep your hair dryer around.
From our above photo, it should also be clearer on how the heatspreaders are designed. After removing the strip at the top, the heatspreaders are bent along the edge at the top and are mirror images of each other. The plastic lighting diffuser clips in between. Since the pieces are made from thin aluminum -- but thick enough to resist easy bending, so it feels solid in the hand -- it does not hold a lot of heat, therefore dissipating the heat energy relatively quickly into the surrounding environment. Either way, you will probably never remove them, since the main selling point of Patriot's Viper LED are the LED lights. If it does not clear your processor heatsink, then you might as well not buy this kit, haha.
A closer look at the memory chips on the Patriot Viper LED PC4-24000 2x8GB dual channel memory kit. The photo above should be quite clear -- it says "D9WDH" on each IC. These are Micron manufactured chips identified as MT40A2G4SA-075R:H decoded from the FBGA inscription, with eight 1GB chips on one side only for a total of 8GB on each DIMM. As mentioned on the previous page, these RAM modules run at a frequency of DDR4-3000 with 15-17-17-35 latencies. They operate at a stock voltage of 1.35V, which is right at the Core i3/i5/i7 maximum safe limit of 1.35V. Here are the listed features for the ICs, as obtained from Micron's website:
• VDD = VDDQ = 1.2V ±60mV
• VPP = 2.5V, –125mV, +250mV
• On-die, internal, adjustable VREFDQ generation
• 1.2V pseudo open-drain I/O
• TC maximum up to 95°C
– 64ms, 8192-cycle refresh up to 85°C
– 32ms, 8192-cycle refresh at >85°C to 95°C
• 16 internal banks (x4, x8): 4 groups of 4 banks each
• 8 internal banks (x16): 2 groups of 4 banks each
• 8n-bit prefetch architecture
• Programmable data strobe preambles
• Data strobe preamble training
• Command/Address latency (CAL)
• Multipurpose register READ and WRITE capability
• Write and read leveling
• Self refresh mode
• Low-power auto self refresh (LPASR)
• Temperature controlled refresh (TCR)
• Fine granularity refresh
• Self refresh abort
• Maximum power saving
• Output driver calibration
• Nominal, park, and dynamic on-die termination (ODT)
• Data bus inversion (DBI) for data bus
• Command/Address (CA) parity
• Databus write cyclic redundancy check (CRC)
• Per-DRAM addressability
• Connectivity test (x16)
• JEDEC JESD-79-4 compliant
• sPPR and hPPR capability
Our test configuration as follows:
CPU: Intel Core i7-6700K @ 4.60GHz
CPU Cooling: Noctua NH-D15 (Single fan)
Motherboard: Gigabyte GA-Z170X-UD5
Graphics: Gigabyte G1 Gaming GeForce GTX 970 4GB
Chassis: NZXT H700i
Storage: OCZ RevoDrive 350 480GB; Kingston HyperX Predator PCIe 480GB; SanDisk Extreme PRO 480GB
Power: Seasonic PRIME Ultra Titanium 850W
Operating System: Microsoft Windows 10 Pro
Compared Hardware:
- Patriot Viper LED PC4-24000 2x8GB @ DDR4-3000 15-17-17-35
- GeIL EVO X GEX416GB3200C16DC 2x8GB @ DDR4-3200 16-16-16-36
- G.Skill Ripjaws V F4-2400C15D-32GVR 2x16GB @ DDR4-2400 15-15-15-35
- Kingston HyperX Fury HX426C15FBK4/32 4x8GB @ DDR4-2666 15-17-17-35
- Kingston HyperX Savage Black HX426C15SBK4/64 4x16GB @ DDR4-2666 15-15-15-35
- Patriot Viper Elite PC4-24000 2x8GB @ DDR4-3000 16-16-16-36
Page Index
1. Introduction, Packaging, Specifications
2. A Closer Look, Test System
3. Benchmark: AIDA64 CPU
4. Benchmark: AIDA64 FPU
5. Benchmark: AIDA64 Memory
6. Benchmark: PCMark 8
7. Benchmark: 3DMark
8. Benchmark: PassMark PerformanceTest 9.0
9. Benchmark: SuperPI 1M, Cinebench R15
10. Overclocking and Conclusion
