Testing / comparing : Intel D975XBX2 / Asus P5B DX ***56K WARNING***

[ChaosMinionX]

Exactly.
At 400 MHz, your FSB thoughput is 12.8 GB/s.
At 1:1 your memory throughput is 6400 MB/s.
At 4:5 your memory throughput is 8000 MB/s.

It's simple math. 8000 is better than 6400.

Yes, but of course running a higher memory is going to be faster regardless of 1:1 or 4:5, but 400fsb 1:1 DDR2 800mhz on 533 is going to run faster than say 319fsb 4:5 DDR2 800mhz on 667 mem frequency.

So Its not necessarily an ideal comparison just that your memory is being overclocked by doing so, so of course it would be faster. Or am I interpreting your statement wrong gtj?


EDIT: However to Contribute to your statement regarding bandwidth..... heres a quick bench I did.

FSB: 400mhz / ref freq. 266 / mem ref 533 DDR2 800 1:1 3-3-3-6

--------[ EVEREST Ultimate Edition 2007 (c) 2003-2007 Lavalys, Inc. ]---------------------------------------------------

Version EVEREST v3.80.951 Beta
Benchmark Module 2.1.184.0
Homepage http://www.lavalys.com/
Report Type Quick Report
Computer DEUSEXMACHINA
Generator AjaX
Operating System Microsoft Windows XP Professional 5.1.2600 (WinXP Retail)
Date 2007-04-03
Time 23:28


--------[ Memory Read ]-------------------------------------------------------------------------------------------------

Xeon 3060 3600 MHz Intel Bad Axe 2 D975XBX2 i975X Dual DDR2-800 3-3-3-6 9917 MB/s
--------[ Memory Write ]------------------------------------------------------------------------------------------------

Xeon 3060 3600 MHz Intel Bad Axe 2 D975XBX2 i975X Dual DDR2-800 3-3-3-6 7270 MB/s
--------[ Memory Copy ]-------------------------------------------------------------------------------------------------

Xeon 3060 3600 MHz Intel Bad Axe 2 D975XBX2 i975X Dual DDR2-800 3-3-3-6 7210 MB/s
--------[ Memory Latency ]----------------------------------------------------------------------------------------------

Xeon 3060 3600 MHz Intel Bad Axe 2 D975XBX2 i975X Dual DDR2-800 3-3-3-6 43.5 ns



FSB: 400mhz / ref freq 266 / mem ref 667 DDR2 1000 4:5 4-4-4-12

--------[ EVEREST Ultimate Edition 2007 (c) 2003-2007 Lavalys, Inc. ]---------------------------------------------------

Version EVEREST v3.80.951 Beta
Benchmark Module 2.1.184.0
Homepage http://www.lavalys.com/
Report Type Quick Report
Computer DEUSEXMACHINA
Generator AjaX
Operating System Microsoft Windows XP Professional 5.1.2600 (WinXP Retail)
Date 2007-04-03
Time 23:32


--------[ Memory Read ]-------------------------------------------------------------------------------------------------

Xeon 3060 3600 MHz Intel Bad Axe 2 D975XBX2 i975X Dual DDR2-1000 4-4-4-12 10014 MB/s
--------[ Memory Write ]------------------------------------------------------------------------------------------------

Xeon 3060 3600 MHz Intel Bad Axe 2 D975XBX2 i975X Dual DDR2-1000 4-4-4-12 7293 MB/s
--------[ Memory Copy ]-------------------------------------------------------------------------------------------------

Xeon 3060 3600 MHz Intel Bad Axe 2 D975XBX2 i975X Dual DDR2-1000 4-4-4-12 7749 MB/s
--------[ Memory Latency ]----------------------------------------------------------------------------------------------

Xeon 3060 3600 MHz Intel Bad Axe 2 D975XBX2 i975X Dual DDR2-1000 4-4-4-12 44.0 ns


For me DDR800 3-3-3-6 is rock solid on orthos for 24hrs+, with 2.32v
DDR2 1000 wont even boot cas 3 with anything around that voltage, so I went with the usual 4-4-4-12 and thats what I came up with marginal increases if at all between using either 1:1 or 4:5 however the timings of my DDR2 800 is very very tight for 24/7 thats why I paid for the domc3's but if you dont I suppose 4-4-4-12 DDR2 800 would get pounded by DDR2 1000. So I will go ahead and agree with Gtj on his statement