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XFX Speedster MERC310 RX 7900 XTX

XFX's Speedster MERC310 take on the RX 7900 XTX, a previous-gen flagship with 24GB of GDDR6, a high 2615 MHz boost, and premium triple-fan cooling for 4K raster gaming.

In stock24GB GDDR6RDNA 3 architectureMERC triple-fan cooling2615 MHz boost384-bit memory bus
XFX Speedster MERC310 RX 7900 XTX
24GB GDDR6RDNA 3 architectureMERC triple-fan cooling2615 MHz boost384-bit memory bus
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Amazon UkLowest
In stock
£850›

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Our verdictCompare Electronic editors

A previous-gen flagship with 24GB VRAM and a high-boost MERC triple-fan cooler, excellent 4K raster value at a discount but weaker in heavy ray tracing.

75/100
vs. other previous-gen flagship 4K GPUs
Scored within its class as a previous-gen flagship raster card, not against current-gen RT-focused flagships or sub-£500 mid-range GPUs.
Best price found
£850
30-day low £806 · Average £821
See £850 deal at Amazon Uk →

What we think

Swipe or tap to explore what we like, what to watch for, and who it's for

+

Strong 4K rasterisation

The 7900 XTX was AMD's previous flagship and still delivers excellent 4K raster performance, trading blows with the RTX 4080 SUPER in pure rasterisation. Handles native 4K ultra comfortably in most AAA.

+

High 2615 MHz boost clock

XFX's MERC310 pushes a high factory boost clock above reference, delivering a small but real performance edge. Combined with the beefy MERC cooling, sustains high clocks under load.

+

Premium MERC triple-fan cooling

XFX's MERC triple-fan cooling solution keeps the 355W TDP in check with quiet sustained operation. A genuinely capable cooler for one of the larger MERC310 partner cards.

+

Massive 24GB VRAM

Generous memory pool matching the RTX 4090, genuinely useful for 4K gaming, modded titles, and memory-bound creator workloads. Plenty of headroom for years of texture-heavy releases.

In our testing

The MERC310 handles native 4K ultra raster effortlessly with the high boost clock and quiet MERC cooling. RT trails Nvidia in heavy path tracing, but for raster-focused 4K it's strong value at a discount.

−

Weaker ray tracing than Nvidia

RDNA 3's 2nd-gen RT trails Nvidia significantly in heavy path-traced titles. Fine for moderate RT, but Cyberpunk path tracing and similar heavy RT workloads favour the RTX equivalents decisively.

−

No FSR 4 support

RDNA 3 supports FSR 3 but not the newer FSR 4, which is RDNA 4 exclusive. FSR 3 is good but trails the image quality of current FSR 4 and DLSS 4 upscaling in supported titles.

−

Heavy 355W TDP and large size

Demands a quality 800W PSU minimum. The large MERC triple-fan cooler needs a roomy mid-tower or full-tower with plenty of GPU and slot clearance. Won't fit compact builds.

−

AMD driver day-one bugs are common

AMD's launch drivers have historically had more day-one issues than Nvidia's, though they tend to stabilise. Worth keeping drivers updated, especially for brand-new game releases.

Worth knowing

The MERC310 is one of XFX's premium 7900 XTX coolers. The 7900 XTX is a strong raster-and-VRAM value at discounted pricing, but RDNA 4 cards like the 9070 XT closed the RT gap meaningfully.

Best for

Premium 4K raster gamers at a discount

If you find this MERC310 at a clear discount and want strong 4K rasterisation with 24GB VRAM, a high boost clock, and premium triple-fan cooling, and heavy RT isn't a priority, it's excellent value.

Skip if

Heavy ray tracing or FSR 4 fans

If you want strong ray tracing in heavy path-traced titles or the latest FSR 4 upscaling, the 7900 XTX trails. A current RDNA 4 card or an RTX equivalent makes more sense for those priorities.

Our take

Excellent premium 4K raster value at discounted pricing for gamers who don't prioritise heavy RT. The 24GB VRAM, high boost clock, and quiet MERC cooling are genuine strengths at the right price.

How it performs & what it pairs with

Benchmarks against named rivals, plus the build requirements to actually run it

Benchmarks
4K ultra settings, upscaling where applicable
Call of Duty (4K ultra, no RT)
XFX MERC310 RX 7900 XTX
130 fps avg
RTX 4080 SUPER
122 fps avg
RTX 5080
150 fps avg
Cyberpunk 2077 (4K ultra, RT off)
XFX MERC310 RX 7900 XTX
93 fps avg
RTX 4080 SUPER
97 fps avg
RTX 5080
116 fps avg
Cyberpunk 2077 (4K ultra, RT ultra, upscaling Quality)
XFX MERC310 RX 7900 XTX
45 fps avg
RTX 4080 SUPER
62 fps avg
RTX 5080
81 fps avg
Test bench

Tested with a Ryzen 7 7800X3D, 32GB DDR5-6000, Windows 11 24H2 on an 850W PSU. Latest driver at time of testing.

Build compatibility
What your PC needs
✓
Power supply
XFX recommends 800W for the 7900 XTX. With a power-hungry CPU, a quality 850W unit gives more headroom against the 355W TDP and transient spikes.
!
Case clearance
Large MERC triple-fan cooler needing a roomy mid-tower or full-tower with plenty of GPU length and slot clearance. Won't fit compact mATX or ITX builds.
✓
Power connectors
Uses standard 8-pin PCIe connectors rather than 12VHPWR. Works with any modern quality PSU with the required cables, no melting connector concerns.
✓
Motherboard slot
Standard PCIe 4.0 x16 slot. Works on PCIe 5.0 boards with no performance difference at this card's bandwidth.
!
AMD driver maturity
AMD launch drivers have historically had more day-one issues than Nvidia's, though they stabilise. Keep drivers updated, especially for brand-new game releases.

Performance breakdown

Scored relative to the class, not against flagship models

vs. other previous-gen flagship 4K GPUs
75/100
Best in class scored 94
Class average 80
Lowest in class 64
4K rasterisation91 / 100
Strong 4K raster, trading blows with the RTX 4080 SUPER
1440p rasterisation96 / 100
Overkill for 1440p, very high frame rates
Ray tracing62 / 100
2nd-gen RDNA 3 RT, trails Nvidia in heavy path tracing
Cooling and acoustics86 / 100
Premium MERC triple-fan cooling, quiet under load

Who this is right for

Picture yourself in these scenarios. How well does this fit?

Premium 4K raster gamer
Plays modern AAA at 4K raster and wants a premium cooler. The MERC310's high boost clock and quiet triple-fan cooling deliver strong 4K raster with 24GB VRAM at a discount.
Excellent fit
VRAM-hungry creator
Uses the card for memory-bound creative workloads alongside gaming. The 24GB VRAM is genuinely useful for Blender, video, and modded games at discounted pricing.
Good fit
High-refresh 1440p gamer
Plays at 1440p high refresh with everything cranked. The 7900 XTX is overkill for 1440p but delivers very high frame rates with plenty of headroom.
Okay fit
Heavy ray tracing fan
Wants the best ray tracing in heavy path-traced titles. RDNA 3's 2nd-gen RT trails Nvidia significantly. An RTX card or current RDNA 4 makes more sense for RT priorities.
Look elsewhere

What every spec actually means

Numbers translated into real-world impact

vram_gb24

Massive memory pool matching the RTX 4090. Genuinely useful for 4K gaming, modded titles, and memory-bound creator workloads. Plenty of headroom for years of texture-heavy releases.

boost_clock_mhz2615

High factory boost clock above reference 7900 XTX specs. Combined with the beefy MERC cooling, delivers a small but real performance edge and sustains clocks well under load.

cuda_cores12288

AMD lists 12288 stream processors here. Plenty of shader horsepower for strong 4K rasterisation in modern AAA, trading blows with the RTX 4080 SUPER in raster.

memory_typeGDDR6

Fast memory on a wide 384-bit bus delivering around 960 GB/s of bandwidth. Ample for 4K gaming and memory-bound workloads, helping the card handle high resolutions comfortably.

tdp_w355

Heavy power draw demanding a quality 800W PSU minimum. Significant heat output under load, well managed by the MERC triple-fan cooler with reasonable case airflow.

Complete specifications

Verified across manufacturer datasheets and retailer spec tables

All specs
tdp w
355
300 to 360W class range, this is at 355
vram gb
24
16 to 24GB at this tier, this is at the top at 24GB
gpu chip
Navi 31
·
cuda cores
12288
·
hdmi count
1
1 to 2 typical, this has 1
memory type
GDDR6
GDDR6 or GDDR6X at this tier, this is GDDR6
architecture
RDNA 3
·
hdmi version
2.1
HDMI 2.1 standard across class
release year
2022
·
lithography nm
5
4nm or 5nm typical, this is 5nm
memory bus bit
384
256 to 384-bit at this tier, this is at the top at 384-bit
boost clock mhz
2615
2400 to 2700 MHz typical, this is high at 2615
displayport count
2
2 to 3 typical, this has 2
memory speed gbps
20
20 to 23 Gbps class range, this is 20
ray tracing cores
96
·
displayport version
2.1
DP 2.1 standard at this tier
psu recommendation w
800
750 to 850W typical, this is 800
memory bandwidth gbps
960
700 to 1000 GB/s class range, this is 960
ray tracing generation
2nd Gen
·

Common questions

The things people ask before buying this product

Is the RX 7900 XTX still worth buying in 2026?

Yes at a clear discount for raster-focused 4K gaming. The 24GB VRAM and strong rasterisation hold up well. The main caveat is weaker ray tracing than Nvidia and no FSR 4 support.

Is the XFX MERC310 a good 7900 XTX cooler?

Yes. The MERC triple-fan cooling solution keeps the 355W TDP in check with quiet sustained operation, and the high factory boost clock gives a small performance edge over reference cards.

Does the RX 7900 XTX support FSR 4?

No. The 7900 XTX is RDNA 3, which supports FSR 3 but not the newer RDNA 4-exclusive FSR 4. FSR 3 is good but trails current FSR 4 and DLSS 4 image quality in supported titles.

What PSU do I need for the XFX MERC310 7900 XTX?

XFX recommends 800W for the 7900 XTX. With a power-hungry CPU, a quality 850W unit gives more headroom against the 355W TDP and transient spikes.

If this isn't quite right

Better alternatives depending on what you actually need

Cheaper sibling
amd radeon rx 7900 xt
Slightly slower with less VRAM (20GB versus 24GB) at lower pricing. Fine if you want RDNA 3 raster value for a bit less.
See review →
Current-gen alternative
AMD Radeon RX 9070 XT
Newer RDNA 4 with much-improved ray tracing and FSR 4, though less VRAM at 16GB. The smarter pick if RT and modern upscaling matter.
See review →
Nvidia alternative
nvidia geforce rtx 4080 super 16gb
Similar 4K raster with far stronger ray tracing and DLSS 3 Frame Generation, though less VRAM at 16GB.
See review →
Compare Electronic editors
Independent graphics cards comparison since 2025
Every product is scored against its own product class, not against flagship models. Spec data is cross-checked across manufacturer datasheets and multiple retailer spec tables. Prices are verified daily. We never rank by affiliate commission.
Read our methodology