XFX Speedster MERC310 RX 7900 XTX Black
The XFX Speedster MERC310 RX 7900 XTX Black is XFX’s version of the Radeon RX 7900 XTX. At 344 mm it’s 57 mm longer than the 287 mm reference design. It uses 3 8-pin rather than the reference 2 8-pin. Its video outputs (1 HDMI 2.1a, 3 Displayport 2.1) differ from the reference (1 HDMI 2.1a, 2 Displayport 2.1, 1 USB Type-C). At 3 slots it’s wider than the 2-slot reference design. Below you’ll find every current retailer price and the full spec sheet.
Prices update regularly and may differ at the retailer. This page contains affiliate links.
Gaming performance
Gaming score: geometric mean of in-game FPS, normalized so the RTX 5090 = 100. Render and synthetic scores are in the Benchmarks section below.
Gaming scores are normalised performance indexes derived from Tom’s Hardware’s published GPU benchmarks. Performance per dollar and per watt are our own calculations on top of that data.
1080p Gaming
1440p Gaming
4K Gaming
The Radeon RX 7900 XTX scores 88.1 at 1080p, 71.8 at 1440p, and 60.8 at 4K on a scale where 100 = the fastest GPU we test (RTX 5090). These scores apply to all board versions of this chip.
Benchmarks
Standardized benchmark scores for this chip, each compared to the fastest card we track and linked to its source. They apply to every board version.
3D & gaming
Render
Compute & AI
Where to buy
No in-stock prices right now — check back soon.
No in-stock prices right now
We’re not tracking a live in-stock price for this exact version at the moment. Prices refresh daily — check back soon, or compare other versions of the Radeon RX 7900 XTX below.
Specifications
GPU chip
- Chip
- Radeon RX 7900 XTX
- Architecture
- RDNA 3 Navi 31
- Process node
- TSMC N5/N6
- Shader cores
- 6,144
- SM count
- 96
- Texture units (TMUs)
- 384
- Render outputs (ROPs)
- 192
- RT cores
- 96 · 2nd gen
- Tensor / AI cores
- 192 · 1st gen
Memory
- VRAM
- 24GB GDDR6
- Memory bus
- 384-bit
- Bandwidth
- 960 GB/s
- Memory speed
- 20 Gbps
- Infinity Cache
- 96 MB
GPU die
- Foundry
- TSMC
- Die size
- 529 mm²
- Transistors
- 57.7 billion
- Generation
- Radeon RX 7000
Display & connectivity
- Max resolution
- 7680 × 4320
- Max displays
- 4
- HDCP
- 2.3
APIs & software
- DirectX
- 12 Ultimate (12.2)
- Vulkan
- 1.3
- OpenGL
- 4.6
- OpenCL
- 2.2
- Shader model
- 6.8
Platform features
- Upscaling
- FSR 4.1 (ML upscaling), FSR 3 Frame Generation
- Also runs
- XeSS 2, XeSS 2 Frame Generation
- Resizable BAR
- Yes
Video encoding & decoding
| Codec | Encode | Decode |
|---|---|---|
| H.264 / AVC | Supported | Supported |
| H.265 / HEVC | Supported | Supported |
| AV1 | Supported | Supported |
| VP9 | Not supported | Supported |
Encoder: VCN 4.0 · Decoder: VCN 4.0
Board
- Boost clock
- 2500 MHz(reference)
- Base clock
- 1900 MHz
- TDP
- 355W
- Recommended PSU
- 800W
- Power connectors
- Reference design:
2 8-pinThis card: 3 8-pin
Physical
- Cooling
- Air
- Warranty
- 3 years
- Length
- Reference design:
287 mmThis card: 344 mm - Slot width
- Reference design:
2 slotsThis card: 3 slots - Outputs
- Reference design:
1 HDMI 2.1a, 2 Displayport 2.1, 1 USB Type-CThis card: 1 HDMI 2.1a, 3 Displayport 2.1
Identifiers
- MPN
- RX-79XMERCB9
- ASIN
- B0BNLSW23M
- EAN
- 0840191500640
- UPC
- 840191500640
Chip-level specs — cores, memory, die, APIs, media engine and platform features — are shared by every version of the Radeon RX 7900 XTX. The Board, Physical and Identifier boxes are specific to this XFX variant; a struck-through value shows where it differs from the reference design.
Local AI performance
What the XFX Speedster MERC310 RX 7900 XTX Black can run on your own machine, and how fast. Capacity and speed come from the Radeon RX 7900 XTX chip, so they are the same on every board version; price per GB is this board’s own.
Largest model it can run (8K context)
- Q4 (the usual choice, near-original quality)
- ~32B
- Q8 (closer to original, half the model size)
- ~19B
- FP16 (unquantised, for training and research)
- ~10B
Parameter counts the card holds with room for an 8K conversation, counting the model weights plus its attention cache. A longer conversation needs more memory, so it lowers these figures.
Speed & value
- Speed, 8B model at Q4
- 124-146 tok/s
- Memory bandwidth
- 960 GB/s
- Price per GB of VRAM
- —
Generation speed tracks memory bandwidth, because every word produced reads the whole model from memory. Shown as a range.
Models that fit, at Q4
| Model | Size | Memory needed | Est. speed |
|---|---|---|---|
| Llava 34B | 34.8B | 21.5GB | 31-36 tok/s |
| Yi 34B | 34.4B | 21.5GB | 31-36 tok/s |
| Nous Hermes2 34B | 34.0B | 21.6GB | 31-36 tok/s |
Popular models small enough for this card at Q4, one per family. Speed is left blank for mixture-of-experts models, where a bandwidth estimate is not reliable enough to publish.
Choosing a card for AI? Compare every GPU for local AI, including setups that pool the memory of two or more cards.
Across generations
Where the Radeon RX 7900 XTX sits in XFX’s lineup — the generation before and after.
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