...I have put together this list of my stable BIOS settings that I have achieved so far. This is not intended as an OC'ing Guide. It's purpose is to show what can be accomplished on the 790i MoBo when you have the proper RAM installed on it. I see many people posting their issues with this board and a great number of them are caused by trying to run improper RAM. Using the right RAM is the key to running with solid stability at whatever speed you desire.
This represents many hours of tuning and testing and I hope that it will help those of you that have a similar system. These are all done with my Q9650 Processor (using the stock 9x Mulltiplier) and 4Gb's (2x2) of my Patriot Viper Series Model # PVS34G1600LLK 1600MHz RAM installed in the black slots on my 790i Ultra MoBo. All listed settings have passed both MemTest86+ v4.10 and 20 passes at Max Stress on IBT v2.5. Since I am running on all air cooling, I have not ventured much higher yet. Any higher speeds that I will accomplish after winter gets here (ambient room temp. will be much cooler as I do not heat my computer room) will be added to the list.
To save space, I have intentionally left out the settings sections of the BIOS Templates that do not change. HAPPY OC'ing EVERYONE!!!
EDIT: My Disclaimer: *Use good common sense and try these settings at your own risk* 3.0GHz (CPU stock)(RAM underclocked)
**FSB & Memorv Config**
FSB - Memory Clock Mode:[Linked]
FSB - Memory Ratio: [Synced]
FSB (QDR), MHz: [1333]
Actual FSB (QDR), MHz:[1333]
x MEM (DDR), MHz:[1333]
Actual MEM (DDR), MHz:[1333]
P1: [Auto]
P2: [Auto]
**Memory Timing Setting**
Memory Timing Setting: [Expert]
tCL (CAS Latency):[6]
tRCD:[6]
tRP:[6]
tRAS:[15]
Command Per Clock: [1T]
** Advanced Memory Settings **
tRRD: [Manual] [5]
tRC: [Manual] [34]
tWR: [Manual] [12]
tWTR: [Manual] [16]
tFAW: [Manual] [26]
tREF: [Manual] [7.7uS]
tRFC: [Auto] [74]
**System Voltages**
CPU Core: [Manual] [1.16]
CPU FSB: [Manual] [1.1]
Memory: [Manual] [1.9]
nForce SPP:[Manual] [1.45]
nForce MCP:[Manual] [1.55]
GTLVREF Lane 0: [Manual] [-30mv]
GTLVREF Lane 1: [Manual] [-30mv]
GTLVREF Lane 2: [Manual] [+00mv]
GTLVREF Lane 3: [Manual] [+00mv]
__________________________________________
3.6GHz (CPU OC'd)(RAM stock)
**FSB & Memorv Config**
FSB - Memory Clock Mode:[Linked]
FSB - Memory Ratio: [Synced]
FSB (QDR), MHz: [1600]
Actual FSB (QDR), MHz:[1600]
x MEM (DDR), MHz:[1600]
Actual MEM (DDR), MHz:[1600]
P1: [Auto]
P2: [Auto]
**Memory Timing Setting**
Memory Timing Setting: [Expert]
tCL (CAS Latency):[7]
tRCD:[7]
tRP:[7]
tRAS:[18] *better than the rated 20 which also works*
Command Per Clock: [1T]
** Advanced Memory Settings **
tRRD: [Manual] [6]
tRC: [Manual] [41]
tWR: [Manual] [12]
tWTR: [Manual] [18]
tFAW: [Manual] [31]
tREF: [Manual] [7.8uS]
tRFC: [Auto] [88]
**System Voltages**
CPU Core: [Manual] [1.3]
CPU FSB: [Manual] [1.3]
Memory: [Manual] [1.9]
nForce SPP:[Manual] [1.45]
nForce MCP:[Manual] [1.55]
GTLVREF Lane 0: [Manual] [-50mv]
GTLVREF Lane 1: [Manual] [-50mv]
GTLVREF Lane 2: [Manual] [+00mv]
GTLVREF Lane 3: [Manual] [+00mv]
__________________________________________
3.825GHz (CPU OC'd)(RAM OC'd)
**FSB & Memorv Config**
FSB - Memory Clock Mode:[Linked]
FSB - Memory Ratio: [Synced]
FSB (QDR), MHz: [1700]
Actual FSB (QDR), MHz:[1700]
x MEM (DDR), MHz:[1700]
Actual MEM (DDR), MHz:[1700]
P1: [Enabled]
P2: [Enabled]
**Memory Timing Setting**
Memory Timing Setting: [Expert]
tCL (CAS Latency):[7]
tRCD:[7]
tRP:[7]
tRAS:[20]
Command Per Clock: [2T]
** Advanced Memory Settings **
tRRD: [Manual] [7]
tRC: [Manual] [44]
tWR: [Manual] [12]
tWTR: [Manual] [19]
tFAW: [Manual] [33]
tREF: [Manual] [7.8uS]
tRFC: [Auto] [94]
**System Voltages**
CPU Core: [Manual] [1.3]
CPU FSB: [Manual] [1.3]
Memory: [Manual] [1.9]
nForce SPP:[Manual] [1.45]
nForce MCP:[Manual] [1.55]
GTLVREF Lane 0: [Manual] [-50mv]
GTLVREF Lane 1: [Manual] [-50mv]
GTLVREF Lane 2: [Manual] [+00mv]
GTLVREF Lane 3: [Manual] [+00mv]
__________________________________________
4.05GHz (CPU OC'd)(RAM OC'd)
**FSB & Memorv Config**
FSB - Memory Clock Mode:[Linked]
FSB - Memory Ratio: [Synced]
FSB (QDR), MHz: [1800]
Actual FSB (QDR), MHz:[1800]
x MEM (DDR), MHz:[1800]
Actual MEM (DDR), MHz:[1800]
P1: [Enabled]
P2: [Enabled]
**Memory Timing Setting**
Memory Timing Setting: [Expert]
tCL (CAS Latency):[8]
tRCD:[8]
tRP:[8]
tRAS:[18]
Command Per Clock: [2T]
** Advanced Memory Settings **
tRRD: [Manual] [7]
tRC: [Manual] [46]
tWR: [Manual] [12]
tWTR: [Manual] [19]
tFAW: [Manual] [35]
tREF: [Manual] [7.8uS]
tRFC: [Auto] [100]
**System Voltages**
CPU Core: [Manual] [1.325]
CPU FSB: [Manual] [1.3]
Memory: [Manual] [1.9]
nForce SPP:[Manual] [1.45]
nForce MCP:[Manual] [1.55]
GTLVREF Lane 0: [Manual] [-50mv]
GTLVREF Lane 1: [Manual] [-50mv]
GTLVREF Lane 2: [Manual] [+00mv]
GTLVREF Lane 3: [Manual] [+00mv]
___________________________________________
4.113GHz (CPU OC'd)(RAM OC'd)
**FSB & Memorv Config**
FSB - Memory Clock Mode:[Linked]
FSB - Memory Ratio: [Synced]
FSB (QDR), MHz: [1828]
Actual FSB (QDR), MHz:[1828]
x MEM (DDR), MHz:[1828]
Actual MEM (DDR), MHz:[1828]
P1: [Enabled]
P2: [Enabled]
**Memory Timing Setting**
Memory Timing Setting: [Expert]
tCL (CAS Latency):[8]
tRCD:[8]
tRP:[8]
tRAS:[18]
Command Per Clock: [2T]
** Advanced Memory Settings **
tRRD: [Manual] [7]
tRC: [Manual] [47]
tWR: [Manual] [12]
tWTR: [Manual] [19]
tFAW: [Manual] [36]
tREF: [Manual] [7.8uS]
tRFC: [Auto] [101]
**System Voltages**
CPU Core: [Manual] [1.331]
CPU FSB: [Manual] [1.3]
Memory: [Manual] [1.9]
nForce SPP:[Manual] [1.45]
nForce MCP:[Manual] [1.6]
GTLVREF Lane 0: [Manual] [-50mv]
GTLVREF Lane 1: [Manual] [-50mv]
GTLVREF Lane 2: [Manual] [+00mv]
GTLVREF Lane 3: [Manual] [+00mv]
____________________________________________
4.225Ghz (CPU OC'd)(RAM OC'd)
**FSB & Memorv Config**
FSB - Memory Clock Mode:[Linked]
FSB - Memory Ratio: [Synced]
FSB (QDR), MHz: [1878]
Actual FSB (QDR), MHz:[1878]
x MEM (DDR), MHz:[1878]
Actual MEM (DDR), MHz:[1878]
P1: [Enabled]
P2: [Enabled]
**Memory Timing Setting**
Memory Timing Setting: [Expert]
tCL (CAS Latency):[8]
tRCD:[8]
tRP:[8]
tRAS:[23]
Command Per Clock: [2T]
** Advanced Memory Settings **
tRRD: [Manual] [8]
tRC: [Manual] [48]
tWR: [Manual] [12]
tWTR: [Manual] [20]
tFAW: [Manual] [37]
tREF: [Manual] [7.8uS]
tRFC: [Auto] [104]
**System Voltages**
CPU Core: [Manual] [1.39375]
CPU FSB: [Manual] [1.3]
Memory: [Manual] [1.9]
nForce SPP:[Manual] [1.45]
nForce MCP:[Manual] [1.6]
GTLVREF Lane 0: [Manual] [-80mv]
GTLVREF Lane 1: [Manual] [-100mv]
GTLVREF Lane 2: [Manual] [+00mv]
GTLVREF Lane 3: [Manual] [+00mv]
____________________________________________
4.275GHz (CPU OC'd)(RAM OC'd)
**FSB & Memorv Config**
FSB - Memory Clock Mode:[Linked]
FSB - Memory Ratio: [Synced]
FSB (QDR), MHz: [1900]
Actual FSB (QDR), MHz:[1900]
x MEM (DDR), MHz:[1900]
Actual MEM (DDR), MHz:[1900]
P1: [Enabled]
P2: [Enabled]
**Memory Timing Setting**
Memory Timing Setting: [Expert]
tCL (CAS Latency):[8]
tRCD:[8]
tRP:[8]
tRAS:[24]
Command Per Clock: [2T]
** Advanced Memory Settings **
tRRD: [Manual] [8]
tRC: [Manual] [49]
tWR: [Manual] [12]
tWTR: [Manual] [20]
tFAW: [Manual] [37]
tREF: [Manual] [7.8uS]
tRFC: [Auto] [105]
**System Voltages**
CPU Core: [Manual] [1.39375]
CPU FSB: [Manual] [1.3]
Memory: [Manual] [1.9]
nForce SPP:[Manual] [1.45]
nForce MCP:[Manual] [1.6]
GTLVREF Lane 0: [Manual] [-80mv]
GTLVREF Lane 1: [Manual] [-100mv]
GTLVREF Lane 2: [Manual] [+00mv]
GTLVREF Lane 3: [Manual] [+00mv]
---------------------------------------------------------------------------
4.320GHz (CPU OC'd)(RAM OC'd)
**FSB & Memorv Config**
FSB - Memory Clock Mode:[Linked]
FSB - Memory Ratio: [Synced]
FSB (QDR), MHz: [1920]
Actual FSB (QDR), MHz:[1920]
x MEM (DDR), MHz:[1920]
Actual MEM (DDR), MHz:[1920]
P1: [Enabled]
P2: [Enabled]
**Memory Timing Setting**
Memory Timing Setting: [Expert]
tCL (CAS Latency):[8]
tRCD:[8]
tRP:[8]
tRAS:[24]
Command Per Clock: [2T]
** Advanced Memory Settings **
tRRD: [Manual] [8]
tRC: [Manual] [49]
tWR: [Manual] [12]
tWTR: [Manual] [20]
tFAW: [Manual] [38]
tREF: [Manual] [7.8uS]
tRFC: [Auto] [106]
**System Voltages**
CPU Core: [Manual] [1.4]
CPU FSB: [Manual] [1.35]
Memory: [Manual] [1.9]
nForce SPP:[Manual] [1.45]
nForce MCP:[Manual] [1.6]
GTLVREF Lane 0: [Manual] [-80mv]
GTLVREF Lane 1: [Manual] [-100mv]
GTLVREF Lane 2: [Manual] [+00mv]
GTLVREF Lane 3: [Manual] [+00mv]
_________________________________________________________
4.356GHz (CPU OC'd)(RAM OC'd)
**FSB & Memorv Config**
FSB - Memory Clock Mode:[Linked]
FSB - Memory Ratio: [Synced]
FSB (QDR), MHz: [1936]
Actual FSB (QDR), MHz:[1936]
x MEM (DDR), MHz:[1936]
Actual MEM (DDR), MHz:[1936]
P1: [Enabled]
P2: [Enabled]
**Memory Timing Setting**
Memory Timing Setting: [Expert]
tCL (CAS Latency):[8]
tRCD:[8]
tRP:[8]
tRAS:[24]
Command Per Clock: [2T]
** Advanced Memory Settings **
tRRD: [Manual] [8]
tRC: [Manual] [50]
tWR: [Manual] [12]
tWTR: [Manual] [20]
tFAW: [Manual] [38]
tREF: [Manual] [7.8uS]
tRFC: [Auto] [107]
**System Voltages**
CPU Core: [Manual] [1.40625]
CPU FSB: [Manual] [1.35]
Memory: [Manual] [1.9]
nForce SPP:[Manual] [1.45]
nForce MCP:[Manual] [1.65]
GTLVREF Lane 0: [Manual] [-80mv]
GTLVREF Lane 1: [Manual] [-100mv]
GTLVREF Lane 2: [Manual] [+00mv]
GTLVREF Lane 3: [Manual] [+00mv]
____________________________________________________________________
I will be happy to answer any questions regarding these settings that you might have. As you can see, this RAM is very versitile when running 4GB's on a 790i board. Running 8GB's is a different story, as most of you already know. 1800MHz is "the sweet spot" on my board with the 8GB's and was extremely easy to do...just a few minor adjustments from the above 4GB settings was all it took. With 8GB's installed; I can only run them stable at 1333MHz, 1800MHz, 1828Mhz and 1900MHz.
Since the Patriot Viper "N" Series Modules (SLI Ready with the green heatspreaders) which were made specifically for the 790i boards are past EOL and extremely hard to find; if at all....these are a great alternative. They are basically the same modules with a different colored heatspreader and they do not have the EPP 2.0 (SLI Feature).
post edited by JeffreyHam - 2011/06/11 21:06:07