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Athlon 64 FX & CAS 2.0 Memory

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pitsi   09-30-2003 at 01:29:41 PM

THG used in his benchmarks 2 x 512 MB CL 2.5-3-3-7 (200 MHz) on the MSI K8T mobo. Recently, Corsair has released <A HREF="http://www.corsairmemory.com/corsair/products/specs/cmx512re-3200ll.pdf" target="_new">CMX512RE-3200LL</A>, that are registered memory DIMMS @ 2-3-2-6-T1. Do you believe that an Athlon 64 FX paired with this memory would offer a significan increase in performance or nothing too special?

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pitsi   09-30-2003 at 01:36:36 PM
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I thought I'd check at Newegg, and look what I found out:

CMX512RE-3200LL: $166 (Registered Memory w/ ECC @ 200MHz 2-3-2-6)
CMX512-3200LL: $142 (DDR Memory @ 200MHz 2-3-2-6)

Only $24 difference. I thought registered memory was supposed to be much more expensive than normal DDR400 memory, not to mention those low timings (2-3-2-6). What's up with that?

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speeduk   09-30-2003 at 02:46:30 PM
- 0 +

The performance difference will be fairly big on a system with an A64 FX when going from cl2.5 to cl2. Prabably a couple hundred marks in 3dmark and a few frames a second in games. We need to see some good reviews of an A64 FX rig with a 9800pro and some cl2 memory...

<A HREF="http://service.futuremark.com/compare?2k1=7000747" target="_new"> 3D-2001 </A>
<A HREF="http://service.futuremark.com/compare?2k3=1284380" target="_new"> 3D-03 </A>
<font color=red> 120% overclocker </font color=red> (cheapskate)

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pitsi   09-30-2003 at 02:50:15 PM
- 0 +

I just wish there was a review of the P4EE vs A64 FX, both using DDR400 memory with the same timings (2-3-2-6), and paired with a R9800Pro. Maybe (or probably?) the results would be quite different than the ones we have today.

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speeduk   09-30-2003 at 03:00:04 PM
- 0 +

The guys over at tbreak used cl2 memory with the normal 3200 A64 and got good results at stock speeds. The main reason why the FX51 isn't blowing the 3200 away is because of the slack memory timings of normal registered memory they use in benchmarks. Even on my nforce 2 system, 200mhz @ 2/3/3/10 is faster than 215 @ 2.5/3/3/10. And going from cl2 to 2.5 @ 200mhz its about 250 3dmarks slower in 2001se which is fairly big if not amazing. And on a platform such as the A64, which is very sensitive to latency, it could make twice the difference...

<A HREF="http://service.futuremark.com/compare?2k1=7000747" target="_new"> 3D-2001 </A>
<A HREF="http://service.futuremark.com/compare?2k3=1284380" target="_new"> 3D-03 </A>
<font color=red> 120% overclocker </font color=red> (cheapskate)

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