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Corsair Twin2X2048-6400C4 Memory Review
Corsair Twin2X2048-6400C4 Memory Review - PCSTATS
Abstract: When running in dual channel mode, the Corsair Twin2X2048-6400C4 provides 12.8GB/s worth of memory bandwidth which happens to be exactly what the dual core Socket AM2 Athlon64 X2/FX processors need. What a coincidence.
 90% Rating:   
Filed under: Memory Published:  Author: 
External Mfg. Website: Corsair May 24 2006   C. Sun  
Home > Reviews > Memory > Corsair Twin2X2048-6400C4

Socket AM2/DDR2 Overclocking!

Overclocking Results:
4-4-4-12 5-5-5-15
memory speed: 254 MHz 276 MHz

If you're new to Overclocking and not sure what to do, check out these two excellent Guides for some pointers:
Overclocking the CPU and Memory
Overclocking the Videocard

Overclocking DDR2 memory on the AMD platform is slightly different than with Intel since here you want to keep timings as tight as possible. Before the overclocking session began, the CPU clock multiplier was first set to 8x, this way the processor would not hold the memory back.

Starting at 200 MHz the clock speed of the motherboard was increased in 4-6 MHz intervals. The Corsair Twin2X2048-6400C4 was definitely up to the overclocking challenge and didn't run into much difficulty till we hit the 242 MHz mark. Anything higher and the Foxconn nForce 590 SLI motherboard refused to POST. Increasing the memory voltage to 2.0V stabilized things and we continued to push the motherboard further.

At 250 MHz, the system again showed some signs of instability but that was due to the high HyperTransport speed and not the memory. Lowering the HTT multiplier from 5x to 4x solved that issue. Continuing up, the memory seemed to top out at 254 MHz, anything higher and the system had difficulty booting into Windows no matter the voltage. 254 MHz with 4-4-4-12 is definitely awesome, the memory is running at over 1000 MHz with tight timings!

Loosening up the timings to 5-5-5-15, I thought it would be interesting to see how high the memory could clock with more conservative settings. The Corsair Twin2X2048-6400C4 had no problems reaching the Foxconn C51XEM2AA motherboard's top speed of 276 MHz. The memory could probably go higher but we'll need another board before we find out. ;-)

Prelude to Benchmarks

The details of how the Corsair Twin2X2048-6400C4 memory test system was configured for benchmarking, including the specific hardware, software drivers, operating system and benchmark versions are indicated below. In the second column are the general specs for the reference platforms this pair of DDR-2 memory is to be compared against. Please take a moment to look over PCSTATS test system configurations before moving on to the individual benchmark results.

PCSTATS Test System Configurations
test system reference system

amd athlon64 fx-62

clock speed:

14 x 200 mhz = 2.8 ghz
11 x 254 mhz = 2.78 ghz


foxconn c51xem2aa (nf 590 sli)


msi NX7800GTX-VT2D256E

Memory: 2x 1024MB Corsair CM2X1024-6400C4

2x 1024MB Super Talent T800UX2GC4
2x 1024MB Patriot PDC22G8000+XBLK

Hard Drive: 74GB Western Digital Raptor WD740
CDROM: AOpen Combo 52x
PowerSupply: PC Power & Cooling TurboCool 510 SLI
Heatsink: Athlon64 FX-62 Reference Heatsink
Software Setup:

Microsoft WindowsXP SP2
nVIDIA Forceware NF4 9.34
nVIDIA Forceware 91.27


Business Winstone 2004
Content Creation 2004
SiSoft Sandra 2005
Doom 3
Quake 4
Battlefield 2

Office Productivity Source: Zdnet

Business Winstone 2004 runs real applications through a series of scripted activities and uses the time a PC takes to complete these activities to produce its performance scores.

Content Creation Winstone 2004 is a system-level, application-based benchmark that measures a PC's overall performance when running top, Windows-based, 32-bit, content creation applications in Windows XP.

Office Productivity
Business Winstone 2004: Points Ranking
2x 1024MB Super Talent T800UX2GC4 (200/800) 36.2
2x 1024MB Patriot PDC22G800+XBLK (200/800) 36.3
2x 1024MB Corsair CM2X1024-6400C4 (200/800) 36.3
2x 1024MB Corsair CM2X1024-6400C4 (254/1008) 36.8
Content Creation 2004: Points Ranking
2x 1024MB Super Talent T800UX2GC4 (200/800) 46.3
2x 1024MB Patriot PDC22G800+XBLK (200/800) 46.7
2x 1024MB Corsair CM2X1024-6400C4 (200/800) 46.2
2x 1024MB Corsair CM2X1024-6400C4 (254/1008) 47.3

In the Office Productivity tests we see that a heavy memory overclock only increases the scores slightly. That should not surprise anyone, the system is generally user limited here.

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Contents of Article: Corsair Twin2X2048-6400C4
 Pg 1.  Corsair Twin2X2048-6400C4 Memory Review
 Pg 2.  — Socket AM2/DDR2 Overclocking!
 Pg 3.  Benchmarks: SiSoft Sandra, PCMark05, 3DMark05
 Pg 4.  Benchmarks: Doom 3, Quake 4, Battlefield 2
 Pg 5.  Corsair's PC2-6400 C4... Good?

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