P4 2.8C @ 240fsb 1.55v (1:1 CPU/RAM Ratio)
Abit AI7 17 bios
128MB Gigacube 9800PRO Extreme (R350) @ 398/351 stock
2x 256MB Kingston HyperX KHX3200K2/512 BH-5 @ 240mhz 2-2-2-6 at 3.2v vdimm
80GB WD 800JB
240mhz 2226
  
Sandra 2004 Pro SP1
Aida32 v3.93
NB Strap 667fsb
PAT
Buffered Int
Buffered Float

Unbuffered Int
Unbuffered Float

Aida Read
Aida Write
A-A-A-D-D
Y
NB Strap 800fsb
A-A-A-D-D
N
T-A-A-D-D
Y
SR-A-A-D-D
Y
F1-E-A-D-D *
Y
240mhz 2226
  
PCMark04 v120
      
NB Strap 667fsb
PAT
CPU
Mem
CTIAW (MB/s)
Hexus Pifast
Thelab Pifast
A-A-A-D-D
Y
NB Strap 800fsb
A-A-A-D-D
N
T-A-A-D-D
Y
SR-A-A-D-D
Y
F1-E-A-D-D *
Y
* GAT had to be set at F1-E-A-D-D as F1-A-A-D-D will hang half way into pc boot sequence.  How Abit's GAT settings behave depends on the brand, speed and SPD programming of the memory modules. Kingston HyperX KHX3200K2/512 BH-5 has an SPD programmed as 2-2-2-5/6.  In this case, setting GAT refresh rate at AUTO was too tight for the ram as it reads the memory's SPD which is 2-2-2-5/6.  While setting GAT refresh rate to Enhanced loosened the ram enabling system to boot.  Now if you have memory modules with SPD of 2-3-3-7 and set GAT refresh to AUTO it will be easier on the chipset and ram so when you set GAT refresh rate to Enhanced it will tighten the memory with SPD of 2-3-3-7 instead. This is how I understand it. Please correct me if I'm wrong :)