9800X3D vs 9950X3D (and the 9950X3D2): Which X3D CPU to Build Around
AMD's X3D chips are some of the most popular gaming processors right now. The question is which one. For a lot of people the cheapest of the three is the right answer, and the most expensive one is overkill. Here's how I match them to what a customer actually does at my Somerville, NJ shop.
The Three X3D Chips Side by Side
Same socket, very different jobs.
| Ryzen 7 9800X3D | Ryzen 9 9950X3D | Ryzen 9 9950X3D2 | |
|---|---|---|---|
| Cores / threads | 8 / 16 | 16 / 32 | 16 / 32 |
| Max boost | Up to 5.2 GHz | Up to 5.7 GHz | Up to 5.6 GHz |
| L3 cache | 96MB | 128MB | 192MB (V-Cache on both chiplets) |
| Default TDP | 120W | 170W | 200W |
| Socket | AM5 | AM5 | AM5 |
| Best fit | Gaming-first builds | Gaming plus heavy work | Maximum cache, budget no object |
Specs from AMD's 9800X3D and 9950X3D product pages and Club386's 9950X3D2 review.
Why the Cache Matters for Games
The X3D part is the reason these chips are popular.
X3D means AMD stacked an extra layer of L3 cache onto the chip. Games reuse a lot of the same data frame after frame, and the more of it that sits right next to the cores, the less the processor waits on memory. You feel that as fewer stutters and steadier frame rates, especially in big open-world, simulation and strategy games.
Past a point, games don't use more cores. That's why the 8-core 9800X3D keeps pace with the 16-core chips in most games: the extra cores sit mostly idle. Where the 16-core chips pull ahead is everything outside games: video exports, 3D rendering, compiling code, running a stream and a game at once.
On the regular 9950X3D, only one of its two core chiplets has the extra cache, so Windows has to steer games to the right cores. Keeping the AMD chipset driver current is what makes that work. The 9950X3D2 puts cache on both chiplets, which removes that juggling, but Club386's review found its real-world gains over the 9950X3D small for the higher price and power draw.
Which X3D CPU Should You Build With?
The questions I ask at the consultation.
🎮 Pick the 9800X3D if
- The PC is mostly for gaming
- You'd rather put the difference into the graphics card
- You want a cooler, quieter build
- Your "work" is browsing, school and office apps
⚙ Pick a 9950X3D if
- You also edit video, render 3D or compile code
- You stream and play on the same PC
- The PC earns money and time saved matters
- Consider the X3D2 only if you want the most cache possible and the budget covers it
What I See at the Consultation Table in New Jersey
Composite examples, built from the kinds of builds I plan at my Somerville shop.
The gamer who didn't need 16 cores. A Somerset customer came in set on the top chip for a gaming-only PC. We went with the 9800X3D and put the savings into a stronger graphics card. He got higher frame rates than the original plan would have.
The editor who games. A Bridgewater video editor wanted one PC for client work and weekend gaming. The 9950X3D cut her export times and still games as well as the 8-core chip.
Not sure which chip fits? Book a $150 consultation, credited toward the build when you approve it. Tell me what you play and what else the PC does, and you'll get two build ideas within your budget. My guide to the best CPU and GPU for a custom PC is a good read first.
📞 Call (908) 428-955875 N Bridge St, Somerville NJ · Mon-Fri 10-5, Sat 9-2
Directions to Dave's Computers in Somerville, NJ
Downtown Somerville, one block off Main Street, behind Bank of America.
From Bridgewater
Route 22 or Route 202/206 to the Somerville Circle, then Route 28 east (West Main Street) into downtown. Left onto N Bridge St.
Open in Google MapsFrom Hillsborough
Route 206 north into Somerville, right onto West Main Street, then left onto N Bridge St.
Open in Google MapsFrom Bound Brook
Route 28 west straight into downtown Somerville. Right onto N Bridge St.
Open in Google MapsFrom Piscataway
I-287 north to Exit 17 (Route 202/206 south), then Route 28 east into downtown Somerville.
Open in Google MapsFrom Flemington
Route 202 north to the Somerville Circle, then Route 28 east into downtown. Left onto N Bridge St.
Open in Google MapsFrom Princeton
Route 206 north through Montgomery and Hillsborough into Somerville. Right onto West Main Street, then left onto N Bridge St.
Open in Google MapsTimes are typical drives outside rush hour. Call 908-428-9558 before a long drive if you want to confirm I'm at the counter.
X3D CPU Questions From NJ Customers
What comes up when we pick the processor.
Is the 9800X3D or 9950X3D better for gaming?
For a PC that is mostly for gaming, the Ryzen 7 9800X3D is the better value. Its 8 cores and 96MB of L3 cache cover games well, and the 9950X3D's extra cores add little in most games. The 9950X3D makes sense when the same PC also does heavy multi-core work.
What does X3D mean on an AMD CPU?
X3D means the processor uses AMD 3D V-Cache, an extra layer of L3 cache stacked on the chip. Games reuse a lot of the same data every frame, and keeping more of it close to the cores reduces stutter and raises frame rates, especially in big open-world and simulation games.
What is the 9950X3D2?
The Ryzen 9 9950X3D2 is a 16-core AM5 processor with 3D V-Cache on both of its core chiplets, for 192MB of L3 cache and a 200W TDP. Independent reviews found its gains over the regular 9950X3D small in most tests, so it suits builders who want the most cache possible more than value buyers.
Do these X3D CPUs work in the same motherboard?
Yes, all three use AMD's AM5 socket and work on 600 and 800 series AM5 boards, with DDR5 memory. Older boards may need a BIOS update first to recognize them, so check the board's CPU support list before installing.
How much does a custom X3D gaming PC cost in New Jersey at Dave's Computers?
My custom gaming builds start at $2,750, and the processor choice is one part of that. It starts with a $150 consultation where you get two build ideas based on what you play and do, credited toward the build when you approve it.
Building Around an X3D Chip? Sit Down With Dave in Somerville, New Jersey
Bring your budget and a list of what the PC needs to do. You'll leave the $150 consultation with two build ideas, and the fee comes off the build when you approve it. Upgrading an existing AM5 PC instead? See my CPU upgrade service.
📞 (908) 428-9558