2240MHz Mushkin Ridgeback RAM W/ Phenom II X6 1090T & 890FXA-UD5

[Slappa]

I was really surprised to see what these lovely sticks did today. This is the Mushkin Ridgeback 1600MHz 6-8-6-24 kit. On AMD, it is extremely difficult to run any ram above 2000MHz. Well today I broke a personal record and clocked these sticks all the way up to 2240MHz 8-10-6-15-1T. I used my trusty Gigabyte 890FXA-UD5 & Phenom II X6 1090T Setup.

I did not expect these results at all, actually I did not expect my IMC to allow speeds this high. Turns out I have a great hardware combination. When I was in the BIOS the speeds just kept going up and up. I eventually tightened the timings down to CAS8...which I thought was amazing for a frequency of 2240MHz.

PS, Video should be up and live in 25 min

http://www.youtube.com/watch?v=ifsKLBmhC9U


Validated

 

[TridenT]

Just because it's validated via CPU-Z doesn't really mean it's worth anything in realistic terms though. :/ Does it pass memtest, ORTHOS, etc?

 

[Slappa]

Just because it's validated via CPU-Z doesn't really mean it's worth anything in realistic terms though. :/ Does it pass memtest, ORTHOS, etc?

Yeah, it's just a suicide overclock. Not stable at all.

You have to understand that it is extremely difficult to attain clocks like these on AMD. The chips and boards are tuned more for running 1333MHz-1800MHz.

The WR ram clock on the AMD platform is 2500MHz.

I was just seeing how far my ram+ board would go.

Stability testing comes later tonight.

 

[Idontcare]

It definitely speaks to the headroom, suicide stable @2240 might translate into 24/7 stable @2000 or @2050 which would still be awesome. But to be sure if you can't hit 2100 for suicide OC then you sure ain't going to hit 2000 for 24/7 stable...its all correlated.

 

[BD231]

We've got DDR3 @ 2000+ and Intel/AMD are still releasing processors that only support 1066/1333.

What up with that?

 

[busydude]

My ripjaws I have are duds.. very little OC head room.

 

[AdamK47]

Bah! Dual channel. How about triple channel kits?

 

[Martimus]

Bah! Dual channel. How about triple channel kits?

His memory controller only supports dual channel memory. He cannot run triple channel.

 

[AdamK47]

Right.

I just want to see 2200+ triple channel kits.

 

[exar333]

We've got DDR3 @ 2000+ and Intel/AMD are still releasing processors that only support 1066/1333.

What up with that?

Because actual performance gains outside of benchmarks doesn't mean very much above 1333. This is especially true of i7 setups with triple channel memory, it is absolutely not bandwidth starved in almost all occasions.

 

[Idontcare]

Because actual performance gains outside of benchmarks doesn't mean very much above 1333. This is especially true of i7 setups with triple channel memory, it is absolutely not bandwidth starved in almost all occasions.

^ this.

The truth of the matter is that the CPU architecture guys gave up on the memory guys long ago, the day they started integrating on-die cache was the day the cpu guys basically said "it is an unacceptable risk to our performance that we let you memory guys be a potential bottleneck".

Ever since then the cpu architecture guys have invested millions if not billions into developing more and more superior cache architectures and hierarchies as well as prefetching algorithms.

The last thing AMD or Intel wants is for their otherwise stellar performing CPU to perform like a dog because the memory industry still has 10ns latency 200MHz base clockspeeds on the dram cells.

To put it differently, from a speed-path performance perspective the memory guys have been nearly engineered out of the critical path.

Personally I'd rather the cpu guys threw those xtor budgets at compute circuits rather than cache sram, but that would require the cpu guys having some confidence that the memory guys will actually have a compelling performance solution in the market for their cpu's to use. That just isn't the reality of the industry. So the cpu guys spend less time being cpu guys and more time being cache memory guys so as to engineer the memory guys out of the picture as best they can afford to.

 

[Slappa]

My ripjaws I have are duds.. very little OC head room.

Wrong.

Youre on a 555 Athlon II ?
If I recall that is a callisto core.
Meaning you have an older IMC revision.

Your ram sticks aren't duds, its just the old IMC's were tuned to run ram below 1700MHz. In most cases good luck getting your ram to run above 1700MHz with any old IMC revision based chips (deneb, callisto, heka). In your case however, I'd run at 1600MHz with the tightest timings possible.

 

[busydude]

In your case however, I'd run at 1600MHz with the tightest timings possible.

I managed to get it to 8-9-8-22-1T.. from the original 9-9-9-24-2T.. with a voltage bump of 0.5. Any tighter than that it would BSOD.. Don't mean to hijack your thread, but any suggestions?

You are right about the IMC though.

 

[Slappa]

I managed to get it to 8-9-8-22-1T.. from the original 9-9-9-24-2T.. with a voltage bump of 0.5. Any tighter than that it would BSOD.. Don't mean to hijack your thread, but any suggestions?

You are right about the IMC though.

First question is what BIOS version are you using?

 

[busydude]

First question is what BIOS version are you using?

I'll let you know after I get back from school. I did not upgrade my BIOS, but I know that it was the BIOS revision that added support for C3 stepping processors.