Hey guys, I recently got a set of the “new” Redline XP4000 (part #991493) to test. This stuff uses Infineon CE-5 chips which seem to clock better than CE-6 and as far as I can see have no 3d stability issues. The RAM came from Mushkin and is a retail set, not hand picked; I’ve been told the recent batch of CE-5 is clocking quite well. I am going to share my results, suggested timings/tweeks, and impressions of the mem. First off a pic of the RAM:
Test bed:
DFI LP NF4 Ultra D (BIOS 0704-2BTA)
FX-57
BFG GeForce 7800GTX @ 540/1385
OCZ PowerStream 520W
Windows Server 2003
Cooling - Custom H20
I started at DDR510 and 2.65v and once I got the drive strength and secondaries nailed down moving up from there was easy. Unlike XP4000 UCCC chips, CE-5 scales somewhat with voltage. 2.67v got DDR560, 2.77v got DDR566.
Secondary timings and drive strength are important w/ this RAM, the wrong drive strength or 1 secondary off and you cant boot. See the settings below or my tweeker screenie to see what settings worked for me. *Note these settings are the TIGHTEST possible that still maintain stability at the speeds I am running the RAM. Some can be relaxed a bit, YRMV. Also what settings work for me may differ slightly for you because of system differences.*
BIOS Settings:
Command Per Clock Enable
TCL-3.0
TRCD-03
TRAS-06
TRP-2
TRC-7
tRFC-13
TRRD-02
tWR-02
tWTR-01
TRWT-03
tREF-4708
tWCL-01
DRAM Bank Interleave-enabled
DQS Skew Control - auto
DQS Skew Value- 0
DRAM Drive Strength - Level 7
DRAM Data Drive Strength - Level 3
Max Async Latency- 8ns
DRAM Response Time - Normal
Read preamble Time- 5ns
Idle Cycle Limit- 00clks
Dyanamic Counter - Enable
r/w Queue bypass: 16X
Bypass Max - 07X
32 Byte Granularity - Auto
Vdimm-2.6v + 0.03v in BIOS
OCing summary
3-3-2
2.69v – 280Mhz
2.80v – 283Mhz
2.88v – 287Mhz
2.5-3-2
2.95v - 260Mhz
*Notes*
- Voltages are actual as measured by DMM
- Results are 32M and 3DMark 05 stable
- See next post for screenshots
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