Now that we have a base reference overclock to fall back on @3600Mhz at 1.39v, it's time to mess around with the memory timings within bios and within Memset v3.1 beta. Still using 2x512MB OCZ PC5400 Platinum XTC 3-3-3-12 memory for the tests initially then will try other memory as well.



Memory timings
Being the first time using a 680i platform, there's so many options in bios to play with. So I spent a couple of hours using 2x512MB OCZ PC5400 Platinum XTC 3-3-3-12 and just playing in memtest86+ v1.65 to get a feel of what the main and advance timings could or could not do. I started with 9x333FSB with unlinked memory clocked at 333mhz 3-3-3-12 with 2T and 2.1v as the base reference setting. Then proceeded to tweak each memory timing/advance timing and see how it changed performance.

I'll use the following to quickly test each setting and graph the average result after 3 runs of each test:


Format for testing:
Super Pi v1.50
1M run #1:
1M run #2:
1M run #3:
1M average:

2M run #1:
2M run #2:
2M run #3:
2M average:

Mbench
Access latency run #1:
Access latency run #2:
Access latency run #3:
Access latency average:

Read datarate (INT) run #1:
Read datarate (INT) run #2:
Read datarate (INT) run #3:
Read datarate (INT) average:
Write datarate (INT) run #1:
Write datarate (INT) run #2:
Write datarate (INT) run #3:
Write datarate (INT) average:

Read datarate (MMX) run #1:
Read datarate (MMX) run #2:
Read datarate (MMX) run #3:
Read datarate (MMX) average:
Write datarate (MMX) run #1:
Write datarate (MMX) run #2:
Write datarate (MMX) run #3:
Write datarate (MMX) average:

Read datarate (SSE) run #1:
Read datarate (SSE) run #2:
Read datarate (SSE) run #3:
Read datarate (SSE) average:
Write datarate (SSE) run #1:
Write datarate (SSE) run #2:
Write datarate (SSE) run #3:
Write datarate (SSE) average:
Results @9x333FSB = 3000Mhz with unlinked
2x512MB OCZ PC5400 Platinum XTC 3-3-3-12@333mhz 3-3-3-12


Bios settings Used:
Will highlight bios options in bold for any subsequent tests below which have changed from the initial settings outlined directly below.
AI Tuning: Manual
Nvidia GPU Ex: Disabled
LinkBoost: Disabled

FSB - Memory Clock Mode: Unlinked
x FSB - Memory Raio: N/A
FSB (QDR), Mhz: 1333 (means 333FSB)
Actual FSB (QDR), Mhz: 1332
MEM (DDR), Mhz: 667 (means 333mhz speeds)
Actual MEM (DDR), Mhz: 666.8

Vcore Voltage: 1.3875v
Memory Voltage: 2.100v for 1T/2T stock tests and 2.200v for 1T tweaked
1.2v HT Voltage: 1.3v
NB Core Voltage: 1.4v
SB Core Voltage: 1.55v
CPU VTT Voltage: 1.4v
DDRII Controller Ref Voltage: AUTO
DDRII Channel A Ref Voltage: AUTO
DDRII Channel B Ref Voltage: AUTO

tCL (CAS Latency): 3
tRCD: 3
tRP: 3
tRAS: 12
Command Per Clock (CMD): 2 clock (2T)

Advance Memory Settings
tRRD: AUTO
tRC: AUTO
tWR: AUTO
tWTR: AUTO
tREF: AUTO
Async Latency: AUTO

CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
MCP PCIE Spread Spectrum: Disabled
SATA Spread Spectrum: Disabled
LDT Spread Spectrum: Disabled

CPU Internal Thermal Control: Disabled
Limit CPUID MaxVal: Disabled
Enhanced C1 (C1E): Disabled
Execute Disable Bit: Disabled
Virtualization Technology: Disabled
Enhanced Intel Speedstep Tech: Disabled
LDT Frequency: 5x

PCIEX16_1 Frequency (Mhz): 100
PCIEX16_2 Frequency (Mhz): 100
PCIEX16_3 Frequency (Mhz): 100
SPP<->MCP Ref Clock, Mhz: 200
2T vs 1T vs 1T Tweaked

Graphed results with actual data further below. The graph represents the average of 3 runs for each test.





tCL (CAS Latency) - tRCD - tRP - tRAS - Command Per Clock (CMD)
tRRD - tRC - tWR - tWTR - tREF - Async Latency


3-3-3-12-2T
AUTO-AUTO-AUTO-AUTO-AUTO-AUTO




Super Pi v1.50
1M run #1: 17.188s
1M run #2: 17.187s
1M run #3: 17.187s
1M average: 17.1873s

2M run #1: 44.344s
2M run #2: 44.297s
2M run #3: 44.313s
2M average: 44.318s

Mbench
Access latency run #1: 60.0 ns (180 clocks)
Access latency run #2: 60.0 ns (180 clocks)
Access latency run #3: 60.0 ns (180 clocks)
Access latency average: 60.0 ns (180 clocks)

Read datarate (INT) run #1: 6876 MB/s
Read datarate (INT) run #2: 6873
Read datarate (INT) run #3: 6840
Read datarate (INT) average: 6863 MB/s
Write datarate (INT) run #1: 2246 MB/s
Write datarate (INT) run #2: 2291
Write datarate (INT) run #3: 2123
Write datarate (INT) average: 2220 MB/s

Read datarate (MMX) run #1: 7344 MB/s
Read datarate (MMX) run #2: 7294
Read datarate (MMX) run #3: 7335
Read datarate (MMX) average: 7324.33 MB/s
Write datarate (MMX) run #1: 2226 MB/s
Write datarate (MMX) run #2: 2278
Write datarate (MMX) run #3: 2035
Write datarate (MMX) average: 2179.67 MB/s

Read datarate (SSE) run #1: 7816 MB/s
Read datarate (SSE) run #2: 7756
Read datarate (SSE) run #3: 7764
Read datarate (SSE) average: 7778.67 MB/s
Write datarate (SSE) run #1: 6005 MB/s
Write datarate (SSE) run #2: 6012
Write datarate (SSE) run #3: 5998
Write datarate (SSE) average: 6005 MB/s

Reboot system and set 1T in bios
3-3-3-12-1T
AUTO-AUTO-AUTO-AUTO-AUTO-AUTO




Super Pi v1.50
1M run #1: 17.109s
1M run #2: 17.141s
1M run #3: 17.094s
1M average: 17.1157s

2M run #1: 43.078s
2M run #2: 43.015s
2M run #3: 43.047s
2M average: 43.0467s

Mbench
Access latency run #1: 55.7 ns (167 clocks)
Access latency run #2: 55.7 ns (167 clocks)
Access latency run #3: 55.7 ns (167 clocks)
Access latency average: 55.7 ns (167 clocks)

Read datarate (INT) run #1: 7114 MB/s
Read datarate (INT) run #2: 7145
Read datarate (INT) run #3: 7138
Read datarate (INT) average: 7132.33 MB/s
Write datarate (INT) run #1: 2476 MB/s
Write datarate (INT) run #2: 2482
Write datarate (INT) run #3: 2373
Write datarate (INT) average: 2443.67 MB/s

Read datarate (MMX) run #1: 7644 MB/s
Read datarate (MMX) run #2: 7656
Read datarate (MMX) run #3: 7664
Read datarate (MMX) average: 7654.67 MB/s
Write datarate (MMX) run #1: 2473 MB/s
Write datarate (MMX) run #2: 2478
Write datarate (MMX) run #3: 2371
Write datarate (MMX) average: 2440.67 MB/s

Read datarate (SSE) run #1: 8096 MB/s
Read datarate (SSE) run #2: 8165
Read datarate (SSE) run #3: 8168
Read datarate (SSE) average: 8143 MB/s
Write datarate (SSE) run #1: 6018 MB/s
Write datarate (SSE) run #2: 5998
Write datarate (SSE) run #3: 5982
Write datarate (SSE) average: 5999.33 MB/s
Reboot system and set 1T in bios and tightened advance memory timings in bios and memset.
3-3-3-12-1T
4-12-4-5-AUTO-AUTO




Super Pi v1.50
1M run #1: 17.109s
1M run #2: 17.109s
1M run #3: 17.110s
1M average: 17.1093s

2M run #1: 42.469s
2M run #2: 42.469s
2M run #3: 42.469s
2M average: 42.469s

Mbench
Access latency run #1: 55.7 ns (167 clocks)
Access latency run #2: 55.7 ns (167 clocks)
Access latency run #3: 55.7 ns (167 clocks)
Access latency average: 55.7 ns (167 clocks)

Read datarate (INT) run #1: 7170 MB/s
Read datarate (INT) run #2: 7150
Read datarate (INT) run #3: 7095
Read datarate (INT) average: 7138.33 MB/s
Write datarate (INT) run #1: 2651 MB/s
Write datarate (INT) run #2: 2643
Write datarate (INT) run #3: 2578
Write datarate (INT) average: 2624 MB/s

Read datarate (MMX) run #1: 7676 MB/s
Read datarate (MMX) run #2: 7659
Read datarate (MMX) run #3: 7618
Read datarate (MMX) average: 7651 MB/s
Write datarate (MMX) run #1: 2643 MB/s
Write datarate (MMX) run #2: 2638
Write datarate (MMX) run #3: 2564
Write datarate (MMX) average: 2615 MB/s

Read datarate (SSE) run #1: 8178 MB/s
Read datarate (SSE) run #2: 8175
Read datarate (SSE) run #3: 8179
Read datarate (SSE) average: 8177.33 MB/s
Write datarate (SSE) run #1: 5997 MB/s
Write datarate (SSE) run #2: 6000
Write datarate (SSE) run #3: 5999
Write datarate (SSE) average: 5998.67 MB/s