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GSkill 2800 with Haswell Refresh

Hopper64
Level 15
I have some GSkill memory left over from last year I could never use (F3-2800C12D-16GTXDG) because of the Haswell CPU I was using. Never got it stable at 2800, or at 2400, etc for that matter. Ended up replacing both the CPU and the memory with what's in my sig. Now that we will have the i7 4790K soon, does anyone know yet if I can use this 2800 stuff? Be nice to get the memory to that speed. Thanks.
MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro
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7 REPLIES 7

Sabishii_Hito
Level 7
It will depend on your individual CPU's integrated memory controller more so than on the board, though I've never heard of a Haswell chip that couldn't do DDR3-2400 at least while keeping the core clock at stock speed.

Hopper64
Level 15
Yea, the first 4770K I had last year was so unstable at anything above 1600. It was quite frustrating. I hope the new chip is better with this. I had seen rumors that the memory controller was moved back to the board and off the CPU, but I don't think that's accurate. Thanks for your reply.
MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

I have G.SKill 2800 memory, and it works fine on my 4770K. I even clocked it down from 2 to 1 T. I did have to bump the SA and Digital and Analog IO voltages up quite a bit for it to even post, and then be stable. (Nothing crazy though)

Hopper64
Level 15
Yea, I tried everything with mine. Spoke with GSkill techs and still never had a stable system. Messed with the voltages as well, still no luck. Hoping the new chips will solve this.
MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

Nate152
Moderator
37355



Here is my 3770k doing 2800Mhz. on the RAM. My first 3770k could not do it. It does depend on the imc on the cpu whether it can hit 2800MHz.

jab383
Level 13
When having trouble with higher DRAM clocks, check Vccsa first then a few other things. A Vccsa step-up of 0.1 to 0.2 often works wonders. See the guide:

http://rog.asus.com/254052013/maximus-motherboards/recommended-settings-for-overclocking-maximus-vi-...

I don't see any reason the 4790K would be much better than 4770K on the average. There's the rub. Haswells have such a wide range of performance that they can't be compared to each other. I think you have as much chance getting a good performing 4790K as with any other dip into the lottery. The 4790K advantage is supposed to be in the internal TIM and cooling, which is the deciding factor for me.

Jeff

Hopper64
Level 15
Thanks. I will try this memory when I have the new hardware. I hate having this just sit around this long.
MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro