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Old November 30, 2007, 06:36 PM
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Eldonko Eldonko is offline
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Join Date: Apr 2007
Location: Calgary, AB
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Default Reviewer Tryouts: Mushkin 4GB HP2-6400

Mushkin 4GB HP2-6400 Review

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Test Bed
Testing Methodology
Test Results
Testing Summary
Conclusions and Impressions


In May 2007, Mushkin launched a new 4gb kit, HP2-6400 5-4-4 modules, designed for both high-performance and value. Mushkin includes a lifetime warranty and the specifications are as follows:

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In the spring of 2007, Mushkin has changed their branding and packaging to a more modern look with the white and green making a nice crisp color contrast. Heatspreaders range in color with blue, black, red, and green being some of the more popular choices. A few of the Mushkin flavors using the new packaging and logo:

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A closer look at the HP2-6400 packaging:

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The HP2-6400 uses the FrostByte™ (blue) heatspreader spreaders. I like this color alot, more than the Red for the Redline and Black used in the PC8500.

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Test bed:

For testing, I’m using an E6600 Conroe setup with a DFI LANParty UT ICFX3200-T2R (RD600). Additional specs are as follows:

BFG GeForce 7800GTX @ stock
Mushkin XP-650
Windows XP, 32bit, untweaked
CPU Cooling - Custom H20 and stock cooler on the NB
RAM Cooling – 120mm Panaflo

Testing methodology:

Mushkin rates this RAM at 2.0v, but who needs a warranty right? ;) I spoke with Brian Flood, head of R&D at Mushkin and he recommends keeping voltage at max 2.3v for prolonged use, so that is what I'll use for the time being.

Also, I realize that I am only using a 32bit OS which can only test a lil over 3gb at a time, however I don’t have a 64bit at the moment so that will have to do for now.

Benches used:
Super PI v1.5 (two instances of 32M)

AMD System Manager (clockgen and mem tweeking tool)
Smart Guardian

I am going to test 4-3-3, 4-4-4, and 5-4-4 using 2.0v, 2.1v, 2.2v, and 2.3v for the mem.


Now for some test results:

4-3-3 – 2.1v – 435Mhz

4-3-3 – 2.2v – 451Mhz

4-3-3 – 2.3v – 460Mhz


4-4-4 – 2.0v – 411Mhz

4-4-4 – 2.1v – 435Mhz

4-4-4 – 2.2v – 457Mhz

4-4-4 – 2.3v – 472Mhz


5-4-4 – 2.0v – 478Mhz

5-4-4 – 2.1v – 505Mhz

5-4-4 – 2.2v – 534Mhz

5-4-4 – 2.3v – 538Mhz


I test alot of memory so I always like to add a few suggestions that may help others get that extra few Mhz. Here are some tips that may help with this kit.

1) For secondaries I found that this RAM is quite responsive to loosening trp and trcd a bit. Don’t expect to run the same settings as GMH.
2) tras should be kept above 10 for best results, it actually effects stability in this case
3) Lower drive strength seems to be better than high.
4) CAS has a huge impact on clock speed

Testing Summary:


I thought it was important to mention that I have been running this kit 24/7 for 6 months now at 2.1-2.15v. This is above spec voltage and shows us that this kit is quite durable if ran at reasonable voltages. It has also been active cooled, which is feel is important with all memory.


When the 4GB craze
started, 4GB kits of memory were retailing at $500-600 for anything that would overclock to a decent level. This kit found it niche as a reasonably priced kit of memory that would also oc just a few mhz below kits retailing for double the price. For the enthusiast, this is the holy grail, anytime you can find something cheap that clocks well.

Clocks great
Cheap compared to other 4GB kits
Lifetime warranty
Looks cool
Excellent compatibility (works great on RD600, P35, 965p chipsets)

May be tough to find now

Overall I think you can't go wrong with this kit if you are looking for a 4GB option. It gives great bang for the buck, overclocks near the level of a good 2GB kit, and is quite durable.

I personally test more kits of memory than an average user and this kit is still running my 24/7 machine, and for that reason Mushkin 4GB HP2-6400 gets:

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