Poll: Ryzen 7950X3D, 7900X3D, 7800X3D

[Aeryn]

Do you use more than 32GB ever? If so get 64GB if not get the lower latency 32GB. No point buying extra capacity if you ain't gonna use it.

Especially when that extra capacity is achieved by having 2 memory ranks per channel instead of 1. This is harder on the motherboard and the memory controller, generally causing more frequency loss and OC troubles than it's worth on DDR5.

For example on most of MSI's X670/E boards they have EXPO profiles validated up to 6600mt/s with 1DPC 1RPC but only 6000mt/s with 1DPC 2RPC. (DPC = DIMMs per channel, RPC = Ranks per channel)

There was a YouTube video saying you should really really use 6000MT/s CL30 (not 36!), and the difference is massive can be massive. Ryzen has always been very latency sensitive. Let me try and find the video.

CL doesn't have a huge impact by itself. You get much larger latency and throughput differences from other factors like the infinity fabric clock and the memory controller clock. The box timings on a kit can sometimes indicate what type of memory chips it has though and that can be important.

 

[BigBANGtheory]

Honestly don’t know if I should go 64gb 6000 c40 or 32gb c36 (these are the only options I have at the retailer I use) hmmmmm

You want 6000 CL30 (CAS), why pair a modern CPU with junk memory. Pay the import if you need to order elsewhere.

 

[keyser van someone]

I'm maybe upgrading to AM5 next year, it'll be interesting if/when faster RAM comes out with even better performance, if the price is right of course.

The X3D chips are great but I'll be going with non-X I think for less power and heat and 90% of the gaming performance.

 

[Iron Man]

Checked the OCUK 7950x3d page and it says ‘This is a Pre-Order Item which means not in stock and we expect to fulfill your pre order by end of March’.

Looks like there will be none for sale in the afternoon then….

 

[rexehuk]

5950x to 7950x thinking about jumping up again, Depending on the DCS performance

Your money but that seems a bit nuts!

 

[Aeryn]

I'm maybe upgrading to AM5 next year, it'll be interesting if/when faster RAM comes out with even better performance, if the price is right of course.

The X3D chips are great but I'll be going with non-X I think for less power and heat and 90% of the gaming performance.

Really just depends what you play. Some games are no faster (or even marginally worse) on x3d, but others are >50% faster. WoW and the Clausewitz engine games (e.g. Stellaris) stand out for that, so does MS Flight Sim 2020.

 

[malachi]

Great missed out because they listed early

They will be relisted (at a higher price!)

 

[delta0]

Checked the OCUK 7950x3d page and it says ‘This is a Pre-Order Item which means not in stock and we expect to fulfill your pre order by end of March’.

Looks like there will be none for sale in the afternoon then….

That message wasn’t there earlier so I think they sold all their stock.

 

[muziqaz]

Checked the OCUK 7950x3d page and it says ‘This is a Pre-Order Item which means not in stock and we expect to fulfill your pre order by end of March’.

Looks like there will be none for sale in the afternoon then….

End of March? Yeah, nah. Might as well go with 7800x3d when that comes out

 

[Aeryn]

That message wasn’t there earlier so I think they sold all their stock.

I can confirm that it didn't show up until quite a while after my order

 

[Aeryn]

End of March? Yeah, nah. Might as well go with 7800x3d when that comes out

100% that thing is gonna get backordered way harder than the 950. Good luck

 

[muziqaz]

100% that thing is gonna get backordered way harder than the 950. Good luck

Yeah, I'm going for 7950x3d primarily. Will see if I have more luck elsewhere. This slip up by ocUK messed up with my work day schedule

 

[Deleted member 258511]

You want 6000 CL30 (CAS), why pair a modern CPU with junk memory. Pay the import if you need to order elsewhere.

I thought with the 3d CPU it didn’t matter so much what memory was used. That’s the only reason I would consider CL 36 memory. I can get CL 30 but I don’t want rgb and they have it.

 

[01001101]

100% that thing is gonna get backordered way harder than the 950. Good luck

7800X3D launch day is starting to sound like a feeding frenzy with people who have been waiting to get their hands on one..

If I were in the business I would definitely start pre orders where possible. I think it would be good to secure say a pallet load, paid for in advance, and then buy extra couple to show AMD supply, demand and also have available stock.

 

[muziqaz]

I thought with the 3d CPU it didn’t matter so much what memory was used. That’s the only reason I would consider CL 36 memory. I can get CL 30 but I don’t want rgb and they have it.

You talking about Corsair Vengeance? I was sad they did not have nonRGB version of that, so had to buy them

 

[LtMatt]

Both sides benefit from tuned RAM, Intel more so as it can go higher, but the differences are not huge.

With X3D, you will get a nice benefit (as shown via TPU) from tuning the CPU using curve optimiser. You will also get some extra performance from tuning the memory, but how much remains to be seen. I saw nice gains on the 7950X by going from EXPO I 6000C30 to 6000C28 with all timings tuned. Reduction in latency from 68ns or so down to 54-55ns in aida64 and games like the lower latency.

Backing up my point above.

Spoiler

Taken from: AMD Ryzen 9 7950X3D im Test: King of the Gaming-Hill

 

[BigBANGtheory]

I thought with the 3d CPU it didn’t matter so much what memory was used. That’s the only reason I would consider CL 36 memory. I can get CL 30 but I don’t want rgb and they have it.

...but you want the performance so you can't have it both ways. Memory timing will matter its not true to say that it doesn't matter, it will matter less in cases where the data is in cache but will it always be in cache? No it won't is the simple answer.

 

[bthitman]

You want 6000 CL30 (CAS), why pair a modern CPU with junk memory. Pay the import if you need to order elsewhere.

Really? (i'll watch that video in a bit) i knew the 6000 was the sweet-spot, but didn't think CAS mattered massively.

I have been buying parts these past few weeks, in the run up to the release of the 7950X3D, and I went with TeamGroup Delta Alpha (AMD 'specific', compared to their Delta range) https://www.teamgroupinc.com/en/product/delta-alpha-ddr5

6000 CL38

My 'thing' is i am looking for white DDR5 hard to find the perfect RAM (white, DDR5, 6000, CL30, 2x16GB, EXPO) - something had to give (in this case, it was CL38 vs CL30)

*EDIT* -> if someone knows of / can point me to the 'utopia' RAM, that would be great!

 

[Deleted member 258511]

You talking about Corsair Vengeance? I was sad they did not have nonRGB version of that, so had to buy them

Yep those are the ones. Would have gone with the Dominator Platinums but they are CAS 36. Thought I might have been able to get away with them but clearly not. I’ll just try and get them elsewhere.

 

[Deleted member 258511]

...but you want the performance so you can't have it both ways. Memory timing will matter it’s not true to say that it doesn't matter, it will matter less in cases where the data is in cache but will it always be in cache? No it won't is the simple answer.

That’s not what has been shouted about on here though is it let’s be honest. I have no problem tuning memory. It’s either “plug and play” or you need 6000mhz at CL30. Which one is it?