RAM Issue: Low memory read/write/copy speeds

[blkwzrd]

Hi there. Anyone know what I've done wrong?

My memory is posting terrible speeds from this Aida64 Cache & Memory benchmark.

Corsair Vengeance LPX 32GB (4 x 8GB) DDR4 DRAM 2400MHz (PC4-19200) C14 (CMK32GX4M4A2400C14))

Quad channel configured in A1 B1 C1 D1.
I have done a BIOS flash to the latest version (2101).

On both BIOS versions I have tried default factory RAM setup (2133) in BIOS
as well as the XMP 2400 profile @ 14, 16, 16, 31 2T that it was sold and packaged as.

I've tried removing all overclocks and doing the original "Optimised defaults".

CPU-Z screenshots of Memory & SPD tabs can be seen here >> http://i.imgur.com/sHnSDzu.jpg

AIDA64 system report >> http://i.imgur.com/vEpu53u.jpg

AIDA64 Memory benchmark result >> http://i.imgur.com/zLMRmc9.jpg

My FPS in games has been about 50% of what it should be. I noticed in Firestrike my CPU Physics test was very poor and initially I thought it was the CPU. But now that I've seen this stuff going on with the RAM it looks like it could be the culprit?



PC Specs:
**CPU** Intel Core i7 5820k (OC 4.4ghz @ 1.22v)
**CPU COOLER** Corsair H110i GTX
**MOTHERBOARD** Asus X99-A/USB 3.1 ATX LGA2011-3
**MEMORY** Corsair Vengeance LPX 32GB DDR4-2400
**VIDEO CARD** EVGA GeForce GTX 980 Ti 6GB HYBRID
**STORAGE** Samsung 850 EVO-Series 500GB SSD
**PSU** EVGA SuperNOVA 1000G2 1000W

 

[Tradesman1]

Do you have the latest BIOS? What does it show in CPU-Z under the memory tab for frequency and channels (also what timings? What is the model # of the DRAM?

 

[blkwzrd]

Do you have the latest BIOS? What does it show in CPU-Z under the memory tab for frequency and channels (also what timings? What is the model # of the DRAM?

Hey mate, firstly thanks for responding!

I've updated the original post to answer your questions and provided all new screenshots of CPU -Z Memory & SPD tabs.

Basically I've tried default and XMP profiles on 2 versions of BIOS with no luck.

Corsair Vengeance LPX 32GB (4 x 8GB) DDR4 DRAM 2400MHz (PC4-19200) C14 (CMK32GX4M4A2400C14)

 

[Tradesman1]

Try raising the DRAM voltage first to 1.25 and try, can also try raising the VCCSA (System Agent voltage) up about the same - add + 0.05

 

[lindsay24]

Give memtest86+ a go. First off, it will tell you if you have a defective DIMM, and secondly, it also shows what bandwidth it can get from your memory in the top left of the screen. This eliminates Windows as a variable if nothing else.

 

[blkwzrd]

Try raising the DRAM voltage first to 1.25 and try, can also try raising the VCCSA (System Agent voltage) up about the same - add + 0.05

Thanks, will try this tonight and post results. Currently manually set at 1.2v as per the RAM specs.

Give memtest86+ a go. First off, it will tell you if you have a defective DIMM, and secondly, it also shows what bandwidth it can get from your memory in the top left of the screen. This eliminates Windows as a variable if nothing else.

Thanks for the comment. I've made the bootable USB for this and will let it run overnight.
I started a test before realising how long it takes and noticed that at the bottom of the top left info it said the speed was around 3000 mb/s again. Cache info looked real high and normal.

It's also using the XMP Profile #2 @ 2666mhz to test despite BIOS using profile #1 @ 2400mhz and CPU-Z / HWinfo showing I'm using 2400mhz.

I'll confirm these comments when I retest tonight.

 

[blkwzrd]

Try raising the DRAM voltage first to 1.25 and try, can also try raising the VCCSA (System Agent voltage) up about the same - add + 0.05

No luck with this unfortunately. Same result.

 

[Tradesman1]

Might try with XMP enabled, profile 1 then raise the CL to 15 manually

 

[blkwzrd]

Might try with XMP enabled, profile 1 then raise the CL to 15 manually

Was already using XMP Profile 1 but I had it all set manually instead of using the EZ auto method.
XMP Profile 1 - 2440mhz. 14-16-16-31 @ 1.200v

Then I changed it to 1.25v as you suggested along with the VCC (+0.05) from 1.05v to 1.1v

So I kept these settings you suggested in your previous response and tried changing to CL to 15 instead of 14 and it didn't like it.
Turned off and on 3 times before posting and it's reset all my OCs to factory.

 

[Tradesman1]

Yes

 

[blkwzrd]

Give memtest86+ a go. First off, it will tell you if you have a defective DIMM, and secondly, it also shows what bandwidth it can get from your memory in the top left of the screen. This eliminates Windows as a variable if nothing else.

Memtest86+ results:

http://i.imgur.com/Sn5lNXQ.jpg

10 hrs. 11/10 tests completed. 0 errors.
Does that seem right?

Memory @ 1924 mb/s

 

[Tradesman1]

Sounds good

 

[blkwzrd]

Sounds good

Haha yes. Other than the 1924 mb/s speed I guess.

 

[Tradesman1]

A step forward - what timings are they running at?

 

[blkwzrd]

A step forward - what timings are they running at?

Before starting memtest86 I had reverted back to optimised defaults in BIOS to ensure that it's not the OC causing anything.
It's currently on the factory JEDEC settings 2133mhz 15-15-15-36 2T. Everything else like voltages on Auto.

 

[Tradesman1]

Is the BCLK at 100?

 

[blkwzrd]

Is the BCLK at 100?

Yeah. I've tried BCLK 100 & 102 configurations.