X2 4800 hates command rate T2!

ahxnguyen

Member
Nov 12, 2004
25
0
0
Please help.
I just replaced an AMD 3500 with x2 4800 and couldn't make it work with T2. Blue screens then reboot by itself.
When the 3500 was there, T1 worked just fine even @ 2714.
Does anyone have any idea to make it work with T1?
Thanks.

MSI K8N Neo4 Plat.
AMD x2 4800 with stock HSF
Corsair XMS 3200C2 Pro
PSU Tagan 4800w 12v @ 28A
BIOS 1.D0
 

cmrmrc

Senior member
Jun 27, 2005
334
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0
are you using 2t because 1t doesnt boot or something?...because if 1t works fine go for it...

like me, i can't boot on 1t so im just running it on 2t...
 

CaiNaM

Diamond Member
Oct 26, 2000
3,718
0
0
Originally posted by: ahxnguyen
Please help.
I just replaced an AMD 3500 with x2 4800 and couldn't make it work with T2. Blue screens then reboot by itself.
When the 3500 was there, T1 worked just fine even @ 2714.
Does anyone have any idea to make it work with T1?
Thanks.

MSI K8N Neo4 Plat.
AMD x2 4800 with stock HSF
Corsair XMS 3200C2 Pro
PSU Tagan 4800w 12v @ 28A
BIOS 1.D0

what doesn't work, t1 or t2? neither?

Originally posted by: gersson
Are you using 2T because you have your ram heavily OCed? Cos i'd avoid running 2T @ any cost.

this has been discussed to death, but there's nothing wrong with running 2t; there's no noticeable difference, altho in certain benchmarks you may see a few % pts in favor of 1t timings (1.1 - 2.1% or 30mb/s)... in fact, if 2t allows you a greater overclock, it can even make up the difference and then some. it's of little significance with a64's architecture. forget cas latency, ram dividers, etc: cpu MHz is still king.

i have the same mem you have (xms512-3200c2pro), and the difference in memory bandwidth between cas2 and cas3 latency was basically non-existent (within a reasonable margin of error of less the 1%, or 3-4mb/s). realworld tests doing video encoding, file compression/decompression, and gaming showed no measurable difference either.

running the same "real world" applications @ 5/4 divider or 1t/2t again only showed differences within a margin of error - differences which were more than compensated for by the higher overclocks avail by running "looser" memory timings.

not that there's anything wrong with being anal about a 1-2% difference in a particular benchmark. there is certainly nothing wrong with trying to squeeze out a couple of % pts, as long as it's not creating a greater disadvantages in another area (like CPU or ram MHz, or having to run fewer sticks of ram - 1gb instead of 2gb for example).

 

LittleNemoNES

Diamond Member
Oct 7, 2005
4,142
0
0
Originally posted by: CaiNaM
Originally posted by: ahxnguyen
Please help.
I just replaced an AMD 3500 with x2 4800 and couldn't make it work with T2. Blue screens then reboot by itself.
When the 3500 was there, T1 worked just fine even @ 2714.
Does anyone have any idea to make it work with T1?
Thanks.

MSI K8N Neo4 Plat.
AMD x2 4800 with stock HSF
Corsair XMS 3200C2 Pro
PSU Tagan 4800w 12v @ 28A
BIOS 1.D0

what doesn't work, t1 or t2? neither?

Originally posted by: gersson
Are you using 2T because you have your ram heavily OCed? Cos i'd avoid running 2T @ any cost.

this has been discussed to death, but there's nothing wrong with running 2t; there's no noticeable difference, altho in certain benchmarks you may see a few % pts in favor of 1t timings (1.1 - 2.1% or 30mb/s)... in fact, if 2t allows you a greater overclock, it can even make up the difference and then some. it's of little significance with a64's architecture. forget cas latency, ram dividers, etc: cpu MHz is still king.

i have the same mem you have (xms512-3200c2pro), and the difference in memory bandwidth between cas2 and cas3 latency was basically non-existent (within a reasonable margin of error of less the 1%, or 3-4mb/s). realworld tests doing video encoding, file compression/decompression, and gaming showed no measurable difference either.

running the same "real world" applications @ 5/4 divider or 1t/2t again only showed differences within a margin of error - differences which were more than compensated for by the higher overclocks avail by running "looser" memory timings.

not that there's anything wrong with being anal about a 1-2% difference in a particular benchmark. there is certainly nothing wrong with trying to squeeze out a couple of % pts, as long as it's not creating a greater disadvantages in another area (like CPU or ram MHz, or having to run fewer sticks of ram - 1gb instead of 2gb for example).

im aware but if he's going to stay in the same place, then 1t>2t
 

Pederv

Golden Member
May 13, 2000
1,903
0
0
Works fine for me.
The only problem I had, when I dropped in my 4800, was on the first time I shut the system down I got an IRQ_NOT_EQUAL_TO_OR_LESS_THAN blue screen. After that, smooth sailing.
 

5t3v0

Senior member
Dec 22, 2005
508
0
0
If I understand your post correctly, you cant get your 4800+ to work at 1T? If so, I have exactly the same problem posted here. Mine locks up or BSODs during stress testing with 1T even at stock cpu & ram speeds. Nothing I have done has helped. I've had vcore over 1.5v but still cant get 1T CPC (although I have a seperate voltage issue on this board - common with Epox it would seem).

Now I'm OC'd to 2.5GHz with 2T and I'm getting lousy benchmarks on the synthetic tests (Everest, Sandra) compared to the equivalent overclock on this same system with the Opteron 144 (which was 1T). PCMark (cpu & memory) and 3DMark, on the other hand, are better (because of the second core). As many say, you can get too caught up on the numbers when in reality it has very little real world affect. I'm resigned to living with it but if you find a way to fix it, please post.
 

ahxnguyen

Member
Nov 12, 2004
25
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0
Didd you mean "work fine with T1"?
If T1 work with x2 4800 on your motherboard, I would think I have problem with either my motherboard or bios on that board. I have the latest bios for my MSI K8N neo4 Plat though.
 

5t3v0

Senior member
Dec 22, 2005
508
0
0
I installed the latest BIOS for my board prior to intalling the X2 but didnt test on the old cpu. Since we have different boards and memory, there's no link there. The problem might be the cpu memory controller. What cpu 'stepping' do you have? Mine's a LDBFE 0611.

Edit: I seriously doubt the impact of 2T is that drastic. Granted, my synthetic scores are lower, but real-word use is no different. I really wouldnt worry about a lower Everest score if games or encoding or whatever you do still perform as well or better.

I was able to tighten my memory timings up to CL 2.5 as a result of the 2T CPC which I couldn't do on the last system at a similar frequency (229MHz).
 

myocardia

Diamond Member
Jun 21, 2003
9,291
30
91
Originally posted by: ahxnguyen
Didd you mean "work fine with T1"?
If T1 work with x2 4800 on your motherboard, I would think I have problem with either my motherboard or bios on that board. I have the latest bios for my MSI K8N neo4 Plat though.
If you're running four sticks of any RAM with an Athlon 64, then you're going to be forced to use a 2T command rate. So, how many sticks are you running?